Scielo RSS <![CDATA[Bragantia]]> http://www.scielo.br/rss.php?pid=0006-870519700001&lang=en vol. 29 num. UNICO lang. en <![CDATA[SciELO Logo]]> http://www.scielo.br/img/en/fbpelogp.gif http://www.scielo.br <![CDATA[<B>Effects of micronutrients on potato crops production in hidromorfic soils of Paraíba Valley</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100001&lng=en&nrm=iso&tlng=en Trabalho executado para estudar a influência, na produção e no tipo dos tubérculos, dos micronutrientes - ferro, cobre, zinco, molibdênio, manganês e boro - sobre a cultura da batata (Solanum tuberosum, L.), em solos de várzea do Vale do Paraíba. Os resultados de produção mostraram elevado efeito do boro e do molibdênio. Os outros micronutrientes não apresentaram efeito algum.<hr/>The influence of the micronutrients iron, copper, zinc, molybdenium, manganese and boron added to the basic fertilizer on yield and quality of potato (Solatium tuberosum L.), growing on alluvial soils was studied. An increase in the yield of 40% in soils of Avareí series and 50% of Paraiba series, was associated with application of boron and molybdenium to the soil. The effect of boron was much more pronounced than that of molybdenium. Application of iron, copper, zinc and manganese have no significant effect on potato yield. <![CDATA[<B>Bamboo as a raw material for the paper industry</B>: <B>studies of three cooking processes with <I>Bambusa tuldoides </I>Munro</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100002&lng=en&nrm=iso&tlng=en Três processos de cozimento - soda, soda-enxôfre e sulfito neutro de sódio - com várias dosagens de reagente, foram estudados para a obtenção de pasta crua para papel, com material de Bambusa tuldoides Munro. Os maiores rendimentos foram obtidos com o sulfito neutro, seguido do soda-enxôfre. O emprego exclusivo da soda, em dosagem igual ou superior a 20% do pêso sêco dos cavacos, trouxe queda no rendimento. Nos testes físico-mecânicos, os papéis se mostraram altamente porosos e resistentes ao rasgo, mostrando-se o material promissor na produção de pasta não branqueada, semelhante a "kraft" de pinheiros. As diferenças, entre os diversos cozimentos, com relação às características do papel foram pouco acentuadas. Para aprodução de celulose branqueada, o processo soda-enxôfre, com 22% de NaOH e 2,2% de S, foi o mais promissor.<hr/>A comparison was made of three cooking processes - soda, soda-sulfur, and neutral sodium sulfite - using four different amounts of alkalis to extract the pulp from Bambusa tuldoides Munro. Yields superior to 50% were obtained in the majority of cookings; but they decreased when 20% or more of NaOH, in relation to the dry weight of chips, were employed. The highest rate of pulp to raw material was obtained with the neutral sodium-sulfite process. The paper produced was highly porous, very good in the tearing and reasonable in folding, tensile-and bursting strength. <![CDATA[<B>Effect of application of granular or ground fertilizers on the development and yield of cotton plants in different types of soils of the State of São Paulo</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100003&lng=en&nrm=iso&tlng=en São relatados resultados de dez experimentos de adubação do algo-doeiro conduzidos em diferentes unidades de solo do Estado de São Paulo. Misturas de adubos que continham 12, 43 e 25 kg/ha de N, P(2)0(5) e K2O, respectivamente, e misturas com o dobro das referidas doses, ministradas às plantas sob as formas granulada e moída, foram estudadas face ao comportamento de parcelas testemunhas. Ensaios conduzidos em solos argilosos apresentaram efeito evidente de adubação, quer na produção, quer em certas características do produto algodoeiro, como pêso de 1 capulho, pêso de 100 sementes, porcentagem de fibra e índice de fibra. O efeito da adubação sôbre a produção foi menor nos ensaios conduzidos em solos arenosos. Dentre as características citadas, apenas a porcentagem de fibra mostrou-se influenciada estatisticamente pela aplicação de adubos. De maneira geral, as misturas granulada e moída de adubos influenciaram igualmente o desenvolvimento e a produção do algodoeiro.<hr/>The effects of granulated or ground fertilizer mixture (at two levels: 12:43:25 or 24:86:50 kg/ha of N, P2O5, K2O) were compared with untreated plots in different types of soils in the State of São Paulo (Brazil). Results of ten such experiments showed that in the clay soils, the fertilizer increased significantly the yield, weight of boll and seeds, lint percentages and lint index. In sandy soils the effect of fertilizer on cotton yield was less pronounced, and lint percentage was the only characteristic of the product that was influenced by the application of fertilizer. In general, both granulated or ground fertilizers influenced similarly the development and the yield of cotton plants. <![CDATA[<B>Effect of fused phosphates and plain superphosphate on the cotton production in different soils of the State of São Paulo</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100004&lng=en&nrm=iso&tlng=en Efeito dos termofosfatos "Fertiminas", Foscal, Fosleucal e Foscadu foi comparado ao do superfosfato simples, no que se refere à produção de algodão em caroço, no ano da adubação, em quatro ensaios efetuados em duas unidades de solo do Estado de São Paulo. Superfosfato simples apresentou maior efeito sôbre a produção; Foscal o menor. Influenciaram regularmente, "Fertiminas", Fosleucal e Foscadu. Em vista do pequeno número de ensaios, é recomendável o prosseguimento do estudo dêstes três últimos termofosfatos, principalmente.<hr/>The effect on cotton yield of fused phosphates "fertiminas", foscal, fosleucal and foscadu was compared with that of plain superphosphate in two types of soil in the State of São Paulo (Brasil). The best response of cotton plants to phosphorus was obtained with plain superphosphate and the worst with foscal. "Fertiminas", fosleucal and foscadu had an intermediate effect. <![CDATA[<B>Effect of liming and phosphate manuring on wheat cultivated in a soil of low pH and fertility</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100005&lng=en&nrm=iso&tlng=en São apresentados resultados experimentais, em cultura de trigo (Triticum sativum, L.), da aplicação de calcário e adubação fosfatada, em diferentes níveis e formas de aplicação, em Latossolo Vermelho Escuro-Orto, da Estação Experimental de Capão Bonito, de baixa fertilidade e ainda não adubado anteriormente. Mostraram-se elevados os efeitos do corretivo e do fertilizante fosfatado. A dose mínima de calcário, ou seja, 2 t/ha, provocou o mesmo efeito que a dose dupla. Com o fósforo, a produção cresceu com o aumento de fertilizante.<hr/>The effect of phosphate manuring associated with liming on wheat yield was tested in an Ortho-Dark Red Latosol, at Capão Bonito Experimental Station. There was a significant response on the wheat grain yield following application of phosphorus and lime. The yield increase was positively correlated to the phosphorus concentration, but 2 t/ha or 4 t/ha of lime had similar effect. Limestone applied prior to plowing resulted in better yield than after. <![CDATA[<B>Selection of cotton plants resistant to fusarium wilt in a plot where similar disease occurs on hyacinth bean (<I>Dolichos lablab</I> L.)</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100006&lng=en&nrm=iso&tlng=en Em área de Latossolo Roxo, localizada na Estação Experimental "Theodureto de Camargo", em Campinas, verificou-se incidência de doença provocando "murcha", com sintomas internos caracterizados pelo escurecimento dos vasos, sucessivamente em plantas de labelabe e em algodoeiro. Em ambas as espécies vegetais determinou-se a presença de fungos do gênero Fusarium, mediante isolamento feito em plantas doentes. Seleções, feitas na referida área, de plantas pertencentes a linhagem de algodoeiro suscetível à murcha de Fusariumderam origem a linhagens que revelaram apreciável resistência quando testadas em solo infestado por Fusarium oxysporum f.vasinfectum (Atk.) Snyder & Hansen. São discutidos aspectos relacionados com a possível descoberta de nova fonte genética de resistência à doença e com a existência desse fungo sob infestação natural na Estação Experimental mencionada. Também é apontada a possibilidade de serem o algodoeiro e a leguminosa em questão hospedeiras do mesmo agente patogênico.<hr/>The occurrence of wilt disease, successively in plants of hyacinth bean (Dolichos lablab L.) and cotton, was observed in a plot of latosolic B (Terra Roxa) soil at the "Theodureto de Camargo" Experiment Station at Campinas, where no Fusarium wilt has been recorded before. Both species presented internal symptoms consisting in darkened vessels. Fungi of the genus Fusarium were isolated from these plants. Plant selection for wilt resistance was made in the above mentioned area where a Fusarium - susceptible variety (IAG 51/1104) of cotton had been planted. The progenies when tested in soils infested by Fusarium oxysporum f. vasinfectum Atk.) Snyder & Hansen revealed fair resistance to wilt. IAG 51/1104 comes from a cross between the varieties Delfos and Delta Pineland-10, both wilt susceptible under field conditions of the State of São Paulo. It is likely that the wilt resistance of some of its progeny might have originated by recombination. It is also pointed out that the wilting agent (F. oxysporum f. vasinfectum) might occur in the "Theodureto de Camargo", Experiment Station and be responsible for the wilt in hyacinth bean and cotton plants. <![CDATA[<B>Comparative reactions of some cotton varieties to Verticillium wilt in field conditions</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100007&lng=en&nrm=iso&tlng=en Foi estudado o comportamento de variedades paulistas de algodoeiro em terreno infestado pelo fungo causador da "murcha de Verticillium", no Estado de São Paulo. As variedades IAC RM3 e IAC RM4, resistentes à Fusariose, destacaram-se em produção e apresentaram as menores porcentagens de plantas com sintomas externos da doença estudada. Os resultados sugerem que tais variedades constituem também fontes genéticas de resistência à murcha verticilar.<hr/>A study was made on the reactions of the cotton varieties commonly cultivated in the State of São Paulo (Brazil) to Verticillium wilt under field conditions. The effects of the disease were evaluated by determining the percentages of plants showing the symptoms of the Verticilliumwilt and by measuring the yield of each variety. The Fusarium resistant varieties IAC RM3 and IAC RM4 gave the highest yields and the lowest percentages of plants infected by Verticilliumwilt. It is suggested that these varieties might represent sources of resistance to Verticillium wilt. <![CDATA[<B>Fertilizing soybeans VIII</B>: <B>effects of increasing doses of lime, phosphorus and potassium on a Red-Yellow Podzolic soil</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100008&lng=en&nrm=iso&tlng=en O efeito de doses crescentes de calcário magnesiano, fósforo e potássio sôbre a produção de soja foi estudado por dois anos em solo Podzólico Vermelho Amarelo, variação Piracicaba, com pH 5,5, adubado com fósforo nas três culturas anteriores à experiência. Não houve resposta à adubação potássica. A reação ao calcário só se manifestou no segundo ano, quando a dose menor, de 1 t/ha, aumentou a produção em 9%. O efeito do fósforo foi significativo e linear; contudo, em média dos dois anos, o aumento proporcionado pela dose maior, de 100 kg/ha de P2O5, correspondeu a apenas 9%.<hr/>The effects of increasing doses of magnesian lime, phosphorus and potassium on the yield of soybeans were studied during two years on a red-yellow podzolic soil with pH 5,5, fertilized with phosphorus in the previous three crops. No response to potassium was obtained. The effect of lime manifested only in the second year, when the smaller dose, of 1 metric ton per hectare, caused an yield increase of 9 per cent. The responses to phosphorus were linear; however, the increase due to the larger dose, of 100 kg/ha of P2O5, corresponded to 9 per cent only. <![CDATA[<B>Diagnosis and prevention treatment, of zinc defficiency in upland rice, cultivated in soils with pH below 7, in São Paulo State, Brazil</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100009&lng=en&nrm=iso&tlng=en No ano agrícola de 1965/66, em plantas de arroz cultivadas em terras altas, sem irrigação e com pH que variava entre 5,75 e 6,90, localizadas nos municípios de Miguelópolis, Leme e Campinas, foram notadas anomalias que se caracterizavam por afetar as plantas desde duas semanas após a germinação, causando morte a algumas delas. As fôlhas mais velhas apresentavam-se com coloração castanho-escura, exceto ao longo dos bordos e da nervura principal, que conservavam a côr verde normal. Algumas fôlhas, além dêsses sintomas, apresentavam o têrço inferior com tonalidade verde-amarelada; outras mostravam-se partidas no sentido do seu comprimento. Resultados obtidos com adubações qualitativas e quantitativas de zinco e pela análise química das plantas evidenciaram que os sintomas descritos eram provocados pela deficiência de zinco quando os teores dêsse elemento eram inferiores a 15 ppm na matéria sêca. Uma dose de 5 kg/ha de sulfato de zinco, aplicada no sulco de plantio, foi suficiente para evitar o aparecimento da deficiência de zinco na planta.<hr/>An abnormality in rice plants was recently noticed in Miguelopolis, Leme and Campinas counties (São Paulo State, Brazil) in soils with pH below 7. It affected the plants soon after germination, killing most of them. The surviving plants had their normal development delayed. Affected plants had their older leaves with brown color, except along the rim and the main vein which continued green. In some cases, leaves split along its length. Younger leaves, however, appeared normal. The cause of these symptoms was attributed to zinc deficiency. Chemical analyses of the whole plant indicated that symptoms appear on rice plants when zinc content was below 15 ppm in dry matter. Application of 5 kg/ha of zinc sulfate in the soil, at the planting time, was enough to avoid manifestation of defficiency signs. <![CDATA[<B>The development of the root system of tomato plants</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100010&lng=en&nrm=iso&tlng=en São apresentados os resultados de estudo do desenvolvimento do sistema radicular de tomateiro (Lycopersicon esculentum Mill.) com 25, 50 e 75 dias do transplante, em solo Latossolo Vermelho Amarelo, fase argilosa, série Barão, localizado no município de Campinas. Os resultados revelaram que cerca de 63% das raízes (média das três determinações) localizaram-se nos 10 primeiros centímetros de profundidade do solo. As profundidades atingidas foram de 1,30, 1,90 e 2,50 metros, respectivamente para as idades acima mencionadas.<hr/>A study was made on the development and distribution of the root system of tomato plant (Lycopersicon esculentum Mill.), var. Santa Cruz IAC-2731, at 25, 50 and 75 days after transplanting in a reddish-yellow latossol, "fase argilosa, série Barão - Campinas", State of São Paulo. About sixty three percent of roots were found in the upper 10 cm layer of the soil, at the three ages considered. The root system of plants was already fully development at the 25th day when reached a depth of 1.30 m; it reached 1.90 m by 50 days and 2.50 m by 75 days. It is suggested that application of fertilizers and irrigation might be confined to the upper 10 cm layer of the soil for the best utilization by tomato plants. <![CDATA[<B>Effects of Nitrogenous and phosphorous fertilization on rice cultivated in flooded soils</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100011&lng=en&nrm=iso&tlng=en São apresentados resultados experimentais de adubação do arroz (Oryza sativa, L.) em solos irrigados de várzea do Vale do Paraíba. Foram estudados, em cinco níveis, os efeitos do nitrogênio em solos argilosos e os do fósforo em solos orgânicos. Aumentos significativos de produção, provocados tanto pelo nitrogênio como pelo fósforo, foram obtidos na maioria dos ensaios efetuados.<hr/>A study was made on the effects of phosphorous and nitrogenous fertilization on rice (Oryza sativa) cultivated in flooded soils in the State of São Paulo (Brazil). Experiments for nitrogen were carried out in clayey lowland and for phosphorus, in organic lawland soils. A significant increase in production of rice was obtained either with nitrogenous or phosphorous fertilizer applications in most of the experiments. <![CDATA[<B>Interplanting indicator plants to determine leaf roll spread in certified seed potato fields</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100012&lng=en&nrm=iso&tlng=en Foi verificado haver correlação entre a manifestação de sintomas nas plantas indicadoras intercaladas no batatal para semente e a disseminação, nêle, do vírus do enrolamento das fôlhas. Médias de 12 ensaios realizados em vários pontos do Estado de São Paulo deram os seguintes valores: 49,6% em Datura stramonium, 34,0% em Physalis sp. e 28,5% em tomateiro Santa Cruz. Somente 0,9% das plantas de batata mostraram sintomas de infecção primária pelo vírus, embora a infecção no campo tenha realmente sido de 23,6%. É sugerida a introdução do uso de plantas indicadoras na legislação que regulamenta a produção de batata-semente certificada como método auxiliar para estimativa do teor do vírus do enrolamento nos tubérculos produzidos.<hr/>Leaf roll infection on the interplanted indicator plants, jimson weed, tomato, and a non-identified Physalis species is correlated to spread of the disease in the seed potato field. Result from twelve tests carried out at several localities gave the following infection averages: jimson weed, 49.6%; Physalissp., 34.0%; tomato plants, 28.5%. Potato plants showed an average of 0.9% primary leaf roll, but tuber tests indicated that field spread had been 23.6%. Potato virus Y infected 45.1% of the tobacco plants, 37.3% of Physalissp., and 18.1% of the tomato plants. Potato plants were not infected with this virus because the Ycomplex present was the one that infects tomato and pepper plants and very seldom potato plants in the field. The viruses of tomato curly top and Brazilian tobacco streak infected jimson weed at the average rates of 16.1% and 2.7%, respectively. Tomato plants showed an average of 4.1% of curly top, but no infection with the Brazilian tobacco streak virus. Potato plants were not affected by these viruses. Tomato spotted wilt virus infected several of the indicator species and also the potato plants, but there was no perpetuation of the virus through the tubers. Interplanting indicator plants in the certified seed potato fields is suggested as a means to estimate the extent of leaf roll spread in the crop. <![CDATA[<B>Effect of exclusive and continuous application of mineral fertilizers on the fertility of a soil</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100013&lng=en&nrm=iso&tlng=en Com o objetivo de verificar se o uso contínuo de adubações minerais pesadas, desacompanhadas de adubações orgânicas, poderia prejudicar o solo, foi executado um experimento em vasos "Mitcherlich", com capacidade para 6 kg de terra, nos quais se empregou solo do tipo Podzolizado de Lins e Marília, variação Marília. Nesses vasos foram feitas 10 culturas sucessivas de milho, cujas plantas foram cortadas e pesadas ao atingirem cerca de 80 cm de altura. Os resultados demonstraram que as plantas dos vasos, através dos quais haviam passado quantidades exageradas de adubos minerais, se desenvolveram melhor do que aquelas dos vasos testemunhas.<hr/>Although largerly employed for economical reasons, it has been suggested that a continuous and exclusive application of mineral fertilizers is deleterious to coffee plantation. To investigate such a possibility, an experiment was carried out in Mitcherlich pots filled with Podzolized soil on Calcareous Sandstone, Marilia variation, which is one of the most commonly used soil for coffee. Ten plantings of corn, used as indicator plants, were made successively in these pots. Plants were harvested when about 80 cm high, and after each harvesting the soil of individual pot was removed, sifted, replaced and heavily fertilized. Prior to new planting, the soil was well watered, dried, then excess o salts being removed by a generous supply of water. A balanced mixture of fertilizer was applied to the plants, as done normally in field cultures. At the end of the experiment, each pot has received a maximum of 440 g of mineral fertilizer which is equivalent to ca. 880 kg of fertilizer applied to an individual coffee plant, under field conditions, in a period of 10 years. Such amount represents roughly a hundredfold dose usually recommended for coffee crop. Nevertheless, corn planted in soils treated with such heavy excess of mineral fertilizer, grew better than those cultivated in control pots. These received only normal level of fertilizers, and had the soil replaced several times during the experiment. <![CDATA[<B>Response of Phormium tenax to different phosphorus fertilizers</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100014&lng=en&nrm=iso&tlng=en A eficiência de quatro fosfatos sôbre a produção de fôlhas e fibras de fórmio foi estudada em experiência conduzida no Estado de São Paulo, em solo de baixada cultivado pela primeira vez. Os quatro fosfatos aumentaram a produção. Dando o valor 100 à produção de fôlhas proporcionada pela farinha de ossos, os índices referentes ao superfosfato simples, ao superfosfato triplo e à fosforita de Olinda corresponderiam a, respectivamente, 96, 87 e 75. Na produção de fibras brutas, as posições ocupadas pelos quatro fosfatos pouco diferiram das observadas na de fôlhas.<hr/>The effects of four phosphorus fertilizers on the yield of leaves and fibres of Phormium tenaxForster were tested in an experiment conducted on a low-land soil of the State of São Paulo. The four fertilizers increased considerably the yield of leaves. Giving the value 100 to the yield obtained with bone meal, the values corresponding to ordinary superphosphate, treble superphosphate and Olinda-phos-phate (a rock phosphate) were 96, 87, and 75, respectively. In the yield of fibres, the positions of the four phosphates did not differ essentially from those observed in the yield of leaves. <![CDATA[<B>Soybean varieties insensible to photoperiodism and tolerant to low temperatures</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100015&lng=en&nrm=iso&tlng=en Experiências com variedades de soja foram conduzidas na Estação Experimental Central "Theodureto de Camargo", em Campinas, e no Campo de Pesquisas do Serviço do Vale do Paraíba, em Água Preta, Pindamonhangaba, visando a produção de grãos ou de forragem, durante o inverno. Nesse período, em que prevalecem dias curtos e baixas temperaturas, verificou-se que o cultivar Aliança Preta-1 pode fornecer excelente produção de grãos (1.700 kg/ha) e que o cultivar Santa Maria-1 tem comportamento muito bom como forrageira, apresentando produção de massa verde da ordem de 22 toneladas por hectare. O comportamento dos cultivares mencionados sugere a existência de germoplasma indiferente ao fotoperiodismo e tolerante a baixas temperaturas.<hr/>In a preliminary trial conducted at Campinas, during the winter of 1957, it was found that a few soybean varieties could grow and produce grains and hay relatively well during that time of the year. During the winter of 1958, a trial including 12 varieties selected according to the informations obtained in 1957, was conducted at Pindamonhangaba (Vale do Paraíba - SP) in irrigated fields. The cultivar "Aliança Preta-1" produced 1.700 kg/ha of grains and had a life cycle of 120 days. The cultivar "Santa-Maria-1" flowered irregularly 90-120 days after emergence, produced 22 ton/ha of mass and was 0,82 m tall. This behavior was unexpected and the cultivar "Santa Maria-1" is apparently insensible to the short days which induce early flowering. <![CDATA[<B>A new species in the genus <I>Stifftia</I> Mikan</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100016&lng=en&nrm=iso&tlng=en É apresentada a descrição de uma nova espécie arbórea do gênero Stifftia, nativa em matas primárias do litoral Norte do Estado de São Paulo. A referida espécie apresenta porte de 2,0-3,0 metros de altura, com fôlhas simples alternas, lanuginosas. Flores dispostas em inflorescência terminal sub-séssil, com 1-5 capítulos em cada ramo. O invólucro dos capítulos apresenta 8-10 séries de brácteas, externamente lanuginosas. Flores com corola amarelada. O fruto é um aquênio de coloração escura, quase preta, encimado por papus unisseriado e vermelho. A nova espécie é conhecida há, pelo menos, quarenta anos, como pode ser demonstrado pelas exsicatas depositadas nos herbários do Instituto Agronômico e Instituto de Botânica. Sob cultivo, a nova Stifftia é encontrada apenas na Seção de Floricultura, do Instituto Agronômico.<hr/>A new species of the genus Stifftia, native in the northern coast of the State of São Paulo, and cultivated at the Instituto Agronômico, Campinas, is described. The new species is 2 - 3 meters high, showing simple and lanate, alternate leaves. Flowers are disposed in terminal inflorescences with 1 - 5 heads at 10 - 15 flowers each. The involucrum of the heads is made up of 8 - 10 seriate bracts. The flowers are yellow. The fruit is an acquenium, with a dark color and a red uniseriate pappus. The new species was named Stifftia Grazieli sp. nov., and is dedicated to the distinguished botanist Graziela Maciel Barroso of the Jardim Botânico of Rio de Janeiro. <![CDATA[<B>Particle morphology and intracellular behavior of cole latent virus</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100017&lng=en&nrm=iso&tlng=en Partículas alongadas de 15 mµ de diâmetro e 650 mµ de comprimento normal foram consistentemente detectadas em exames electrono--microscópicos de preparações "leaf dip" de 6 espécies diferentes de plantas infetadas pelo vírus latente da couve (Brassica oleracea L. var. acephala) (VLC). Tais partículas são consideradas como sendo de um vírus que poderia ser incluído no grupo do vírus S da batata, na classificação dos vírus alongados de Brandes. Exames de secções ultrafinas de tecidos foliar e radicular de couve infetada pelo VLC, demonstraram a ocorrência do VLC, formando agregados mais ou menos organizados no citoplasma. Não se notou alterações citológicas sensíveis como conseqüência da infecção, o que está de acordo com a ausência de sintomas externos em couve infetada pelo VLC.<hr/>Electron microscopic examination of leaf dip preparations made from cole (Brassica oleraceaL. var. acephala), Chenopodium amaranticolorCoste & Reyn., radish (Raphanus sativusL.), mustard(Brassica albaBoiss. Rabenh.), bean (Phaseolus vulgaris L.)and Gomphrena globosaL. plants infected with cole latente virus (CLV) demonstrated consistently the presence of slender rods. These particles, considered as CLV, were about 15 mµ wide and 650 mµ in normal length (NL). The NL was determined in a series of comparative measurements using turnip mosaic virus (NL = 750 mµ) as a standard. Morphological characteristics of CLV permit its inclusion in the potato virus S group, in Brandes' system of classification of elongated plant viruses. Thin section profiles of root and leaf tissues, from CLV-infected cole, showed the frequent occurrence of fibrillar aggregates in the cytoplasm. The particles component of these aggregates were identified as CLV in situ due to the constant association with the infection and their mophological similarities with the particles found in leaf dip preparations. CLV-particles appeared with their longer axis laying side--by-side within these aggregates, often forming a spiral arrangement. Vesiculated areas were occasionally seen in the cytoplasm, with virions in or around them. Virus particles were found in most of the examined cells, except within the tracheids and sieve tubes in the leaf, and within the meristematic zone, in th root. Besides these abnormalities, no other remarkable changes in normal cell structure could be noticed, in agreement with the lack of external symptoms. <![CDATA[<B>Fertilizer experiments with corn XXVI</B>: <B>Trials with various phosphorus sources (9<SUP>th</SUP> SERIES)</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100018&lng=en&nrm=iso&tlng=en Quatro ensaios de adubação do milho com diversos fosfatos na presença de NK foram conduzidos em 1961-62, em diferentes localidades do Estado de São Paulo. No conjunto dos quatro ensaios e dos seis fosfatos estudados, as doses de 60 e 120 kg/ha de P2O5 total proporcionaram aumentos de, respectivamente, 24 e 35 por cento. Em média das duas doses, o aumento devido ao superfosfato simples correspondeu a 1030 kg/ha de grãos. Atribuindo-se valor 100 a êsse aumento, os índices referentes aos outros fosfatos seriam: superfosfato triplo, 98; fosfato bicálcico, 71; fosfato Alvorada, 51; fosforita de Olinda, 50; apatita de Araxá, 40.<hr/>Four experiments comparing six phosphate fertilizers for the production of corn were conducted in 1961-62 at different localities of the State of São Paulo. As an average of the four trials and the six phosphates, the yield increases due to the doses of 60 and 120 kg/ha of total P2O5 corresponded to 24 and 35 per cent, respectively. The average increase due to ordinary superphosphate was 1030 kg/ha of grain. Giving the value 100 to this increase, the relative efficiencies of the other phosphates were: triple superphosphate, 98; dicalcium phosphate, 71; "Alvorada" phosphate, 51; "Olinda" phosphate, 50; "Araxá" phosphate, 40; The last three phosphorus sources are local rock phosphates. <![CDATA[<B>Effects of mineral fertilizers on peanut pod production</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100019&lng=en&nrm=iso&tlng=en Três experiências foram conduzidas no Estado de São Paulo, para estudar o efeito dos elementos fertilizantes essenciais sobre a produção de amendoim em solos Podzolizados de Lins e Marília. O fósforo aumentou apreciàvelmente a produção nas três experiências; o nitrogênio, somente em uma; o potássio, em nenhuma.<hr/>Three factorial experiments were designed to compare the effects of N-P-K fertilizers on peanut (Arachis hypogaea L.) pod production on a Podzolized (Lins and Marilia) soil in the State of São Paulo. Besides the untreated controls nitrogen, phophorus and potassium were tried at the levels: 30, 45 and 30 kg/ha and 60, 90 and 60 kg/ha of N, P2O5 and K2O respectively. An increase in the yield of peanut pods was associated with phosphorus in all experiments and with nitrogen in one out of three. Yield was depressed by potassium fertilizer in all experiments. <![CDATA[<B>Occurrence of the main coffee beans deffects in several stages of ripening</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100020&lng=en&nrm=iso&tlng=en A ocorrência dos principais defeitos do café - grãos de película verde, grãos prêtos e grãos ardidos - foi estudada nos anos de 1967 e 1968, em Campinas, colhendo-se plantas, mensalmente, de abril a março do ano seguinte. Em cada colheita a produção total foi separada nas frações frutos verdes, meio maduro, maduro, passa, sêco normal, "sêco anormal" e café do chão. Nessas frações foi determinada a presença dos referidos defeitos. O defeito, "grão verde", em várias tonalidades, foi encontrado com maior freqüência nas frações de frutos verdes e, em ordem decrescente, nas frações sêco anormal, meio maduro, maduro, passa, sêco normal e sêco do chão. Os dados mostram que os chamados grãos verdes na verdade não provêm exclusivamente de frutos colhidos verdes, pois ocorreram com freqüência em tôdas as frações estudadas. Os grãos ardidos tiveram freqüência mais elevada na fração sêco do chão e decresceram nas frações sêco normal, sêco anormal, verde, meio maduro, maduro e passa. Essa ocorrência, em tôdas as frações estudadas, indica que tal defeito deve resultar de várias causas, e não apenas de fermentações anormais, como geralmente é considerado. O defeito "grão prêto" apareceu com maior freqüência no café sêco do chão e, em ordem decrescente, nos frutos sêco normal e sêco anormal, não ocorrendo nas demais frações. Os resultados mostram a conveniência de colhêr apenas o café maduro, quando então se verificar a menor quantidade dos defeitos estudados. Sugerem também ser recomendável uma revisão na designação dos defeitos, a fim de evitar interpretações errôneas na classificação comercial.<hr/>The occurrence of green-coated beans, brown and black beans was studied in samples of green fruits, under-riped (plant stage) fully riped and over-riped berries, as well as in the normal and abnormal fruits which were dried on the trees and also in the fruits fallen on the ground. The samples were monthly collected during the year 1967 and 1968. The so-called abnormal dried fruits have a dull black exocarp, whereas the normal ones have bright black colored shells. The total production of three plants was harvested every month, separated according to the different ripening stages, and then, after drying, were shelled and the proportion of defective beans was scored. The data showed that the so-called green coated beans appear in significant proportions in all stages studied. The highest percentage of these was found in the unriped fruits and in the abnormal dried fruits. Its occurrence decreases as the fruits become more and more mature. The lowest percentage was found in the samples of dried fruits which had fallen on the ground. The green color is produced by the silver skin which retains the green pigment, probably chrolophyll. The brown beans appear more frequently in the fallen fruits and they also occur in a decreasing proportion in the normal and abnormal dried berries and from unriped to over-riped fruits. This type have been considered to be caused by over-fermentation, however our results indicate that it may have other causes, due to their appearance even in the unriped fruits. The high percentage of brown beans in the fruits dried on the tree indicates that the berries must be harvested in the cherry stage to have a high quality product. The black beans, characterized exclusively by the black endosperm, were more frequently found in the berries dried on the tree or in the dried fruits fallen on the ground. It seems reasonable to assume that the black beans represent a more advanced stage of deterioration of the endosperm. The initial stages would, probably, be characterized by the different shades of brown. Based on these findings it is proposed a revision on the defective beans nomenclature in Brazil. Considering the Brazilian system of coffee classification it was suggested that for the nomenclature of the defective beans more emphasis should be made in the origin of such defects rather than in the general aspect of the beans. <![CDATA[<B>Behavior of São Paulo cotton varieties under different levels of N, P and K fertilization on Lattossolic B "Terra Roxa" soils</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100021&lng=en&nrm=iso&tlng=en São relatados resultados de três ensaios de variedades paulistas de algodoeiro adubadas com diferentes doses dos elementos N, P e K, conduzidos em Latossolo Roxo não infestado pelo fungo causador da murcha de Fusarium, em 1965/66. As variedades IAC 13 e IAC 12 apresentaram ciclo vegetativo mais longo que a IAC RM3. A variedade IAC 13 superou em produção a IAC 12, e a variedade IAC RM3, que apresentou sintomas mais intensos de deficiência de potássio, obteve a menor média de produção. A dose básica de adubação, correspondente a 20, 45 e 40 kg/ha de N, P2O5 e K2O, aumentou significativamente a produção. Em média, a dose dupla proporcionou pequeno aumento, quando comparada com a básica, nas variedades IAC 12 e IAC 13. Em um dado ensaio, essa dose mostrou--se inferior à básica, quando aplicada à variedade IAC RM3. A variedade IAC 12 apresentou a mais alta média de porcentagem de fibra. A IAC 13 foi a melhor quanto aos índices Micronaire e Pressley. A adubação utilizada não concorreu para melhorar nenhuma dessas características; contribuiu entretanto para aumentar o pêso dos capulhos e das sementes.<hr/>The behavior of three São Paulo cotton varieties (IAC 12, IAC 13 and IAC RM3), which differ themselves in vegetative cycle and nutrient requirements, after receiving three levels of complete N, P and K fertilization, were compared under cultivation on latossolic B "Terra Roxa" soils. The inclusion of the variety IAC RM3, resistant to Fusarium wilt, was made considering a possible spreading of this disease, now common in sandy soils, to clay soils. A basic dose of NPK fertilizer, containing 20, 45 and 40 kg/ha of N, P2O5 and K..O respectively, induced a significant increase in cotton yield, in relation to control plots, where no fertilizer was added. Among the varieties, IAC 13, with longest life cycle, presented the highest yield, followed by IAC 12, with intermediate cycle length. IAC RM3 was the less productive. There was also a significant increase in the weight of seeds and bolls due to this basic dose. No appreciable effect of a possible interaction between varieties and fertilization could be noticed. A double dose of fertilizer produced further increase in yield, except in the case of IAC RM3, in which additional amount of fertilizer induced a slight yield reduction and many plants showed signs of potassium defficiency. Considering the fiber characteristics the tested varieties differed significantly. IAC 12 had the highest mean of lint percentage, while IAC 13, on the average, was the best for Micronaire and Pressley indices, confirming previous unpublished determinations. <![CDATA[<B>Survey of the nutritional condition of the coffee in the State of São Paulo through foliar analyses</B>: <B>II - Podzolized soils of Lins and Marilia, Latosolic B "Terra Roxa" and Ortho-Red Yellow Podzol</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100022&lng=en&nrm=iso&tlng=en Em amostras de 134 cafèzais, distribuídos nos principais grupos de solos do Estado de São Paulo, colhidas em três estações do ano, foram determinados 12 elementos químicos essenciais, sódio e alumínio. A percentagem de cafèzais deficientes em nitrogênio foi superior a 80% em todos os solos. No Podzolizado de Lins e Marília, o segundo elemento em falta foi o ferro. No Latossolo Roxo, depois do nitrogênio, a maior deficiência foi a de potássio e zinco; no Podzólico Vermelho Amarelo-Orto, a de boro.<hr/>Roughly, coffee fields are distributed on. the main types of soil in the State of São Paulo as follows: Podzolized Soils of Lins and Marilia, 70%; latosolic B "Terra Roxa", 15%; Ortho-Red Yellow Podzol, 10%; other types, 5%. This paper presents and discusses data on foliar analyses of coffee, plants cultivated on the 3 first soil types. It complements a previous survey made on red-yellow ortho podzol. Leaf samples were collected in the spring, summer and fall, from 134 "Mundo Novo" coffee fields. Besides the content of 12 essential elements, amount of Na and Al were also determined in these samples. Fe, Zn, Mn, and Cu were determined by atomic absorption spectrophotometry. The first 3 elements were determined in a wet digest of 0.5 g of dry plant material with a mixture of HNO3-H2SO4-HC10(4), in a final volume of 20 ml. Determination of Cu, on the other hand, required an extract obtained by dissolving in 10 ml of 0.25N HC1, ashes from 1.25 g of dry leaf tissue, incinerated at 500°C for 2 hours. The same extract used for Fe, Zn and Mn analyses served for Na and Al determination. However, content of Al was estimated by colorimetric method of Aluminon (1) whereas amount of Na was determined by flame emission photometry (2). The remaining elements - N, P, K, Ca Mg, S-S0(4), B and Mo - were determined according to the process described by Lott et al (4, 5). Evaluation of the nutritional condition of the coffee fields in each soil type was based upon the amount of the elements present in the leaf tissue sampled in the summer, compared to the levels considered as critical (4). The results of these evaluations showed a high proportion of plants defficient in nitrogen, in all soil types, indicating the importance of nitrogen fertilization. In Podzolized Soils of Lins and Marilia, attention should be given to Fe, Ca and Zn defficiency; there is also the possibility of toxic effects induced by excess of Mn in such soils. Besides N defficiency, latosolic B "Terra Roxa" had frequently defficiency of K and Zn, while Ortho-Red Yellow Podzol, of boron. <![CDATA[<B>Morphological characters and chromosome numbers in <I>Pelargonium</B></I>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100023&lng=en&nrm=iso&tlng=en O presente trabalho reune observações morfológicas e citológicas em dez cultivares e cinco espécies de Pelargonium aromático e em onze cultivares ornamentais. Os cultivares aromáticos são, morfològicamente, muito semelhantes ao P. x asperum, do qual possivelmente devem ter-se originado; apresentam meiose irregular, com alta freqüência de monovalentes. Os cultivares ornamentais pertencem todos à espécie P. zonale, e dentre êles uns são diplóides e outros tetraplóides. Das espécies em coleção algumas se identificam com as descrições anteriores, mas outras devem ter sido introduzidas erroneamente classificadas. Considerando o material estudado, foram encontrados, para Pelargonium, três números básicos de cromossomos: x = 8, x = 9 e x = 11.<hr/>Morphological characters and chromosome number of ten cultivars and five species of aromatic Pelargonium, as well as ornamental cultivars, were compared. The oil cultivars are very alike morphologically and they are supposed to be clones of P x asperum. They have irregular meiosis with high frequency of univalents and are male sterile; their chromosome number is 2n=77. Some of the species (P. graveolens from Italy, P. odoratissimum, P. tomentosuni and P. grossularioides) agree with previous descriptions, but others, as P. graveolens from Argentina and P. radula from Italy, were probably introduced with a wrong classification. Their chromosome number were counted and compared to previous determinations with excelent agreement. No data was found concerning P. grossularioides; the present chromosome counting seems to be the first. The ornamental cultivars studied here belong to the species P. zonale; some are diploid, others tetraploid; in the diploid cultivars mixoploidy is frequent. As chromosome number is concerned, three basic numbers were established; x=8 for P. odoratissimum, x = 9 for P. grossularioides cv. cocoanut, P. graveolens from Italy and P. zonale (ornamental cultivars), and x=11 for P. graveolens from Argentina, P. tomentosuni, P. radens and P. x asperum (aromatic cultivars). <![CDATA[<B>Effect of different nitrogen fertilizers on the productivity of flooded rice</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100024&lng=en&nrm=iso&tlng=en Foi estudado o efeito, na cultura de arroz (Oryza sativa L.) irrigado, de diferentes doses e tipos de fertilizantes nitrogenados, bem como a conveniência da construção de diques separando as parcelas. Foram estudados três níveis de nitrogênio e três tipos de fertilizantes, na presença de fósforo e potássio constantes. A variedade utilizada foi a Iguape-agulha. Os dados mostraram grande efeito da adubação nitrogenada, no aumento da produção do arroz. O maior aumento foi apresentado pela torta de mamona, seguida do sulfato de amônio e do nitrocálcio. A presença de diques de separação de canteiros não se mostrou necessária, para evitar a interferência da adubação nitrogenada, em canteiros vizinhos, mesmo utilizando adubos altamente solúveis.<hr/>A study on the response of flooded rice crops to different kind and doses of nitrogen fertilizers was made. Also the necessity of separating experimental plots with a dike to avoid possible interference among treatments due to solubilization and movement of fertilizers was verified. The experience was carried out at the Experimental Station of Paraíba Valley Service, at Pindamonhangaba, S.P. The fertilizers tested were: castor bean mead, ammonium sulfate and Cal-Nitro in 3 different levels. A constant amount of potassium and phosphorus was applied to all treatments. The rice variety used was Iguape Agulha. Results indicated that there was a significative increase on rice grain production after application of nitrogen fertilizers. Castor bean mead was the most effective in increasing the yield, followed by Ammonium Sulfate and Cal-Nitro. The data also showed that dike construction is unnecessary, because no interference of one treatment on another could be detected. <![CDATA[<B>Rice fertilization: study of the effect of nitrogen, phosphorus, micronutrients and lime</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100025&lng=en&nrm=iso&tlng=en Efeitos das adubações nitrogenada e fosfatada, da calagem e da aplicação de micronutrientes foram investigados através de ensaios de campo em cultura de arroz (Oryza sativa L.), em solos do Vale do Paraíba, no Estado de São Paulo. Os níveis de nitrogênio e fósforo foram de 0, 40 e 80 kg/ha; para o calcário, em solos orgânicos, de 5 t/ha, e nos argilosos de 3 t/ha; os micronutrientes entraram nas dosagens usuais. Os resultados mostraram sempre grande reação ao nitrogênio, inclusive à dose de 80 kg/ha. Para o fósforo, as reações foram muito menores, e somente em parte dos casos houve aumento de produção. Não se observou reação ao calcário e aos micronutrientes.<hr/>Thirtheen experiments were carried out at several places in the Paraíba Valey, São Paulo State, to study the effects of nitrogen, phosphorus and micronutrients fertilization, as well as of liming, on rice production. Nitrogen and phosphorus were applied at the levels of nihil, 40, and 80 kg/ha. Lime was applied at the levels of 5 and 3 t/ha in the organic and clayey soils, respectively. Seeds of the variety "Iguape-agulha" were utilized. Cultivation was under flooding system. Planting was done directly with the seeds. The results showed a great response of rice production to nitrogen fertilizer, wich was considerable even at higher dosis. Only in 6 out of the thirteen experiments, there was some response to phosphorus. No response to micronutrients or to liming could be noticed. <![CDATA[<B>Preliminary results in clonal pear rootstock selection</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100026&lng=en&nrm=iso&tlng=en Efeitos das adubações nitrogenada e fosfatada, da calagem e da aplicação de micronutrientes foram investigados através de ensaios de campo em cultura de arroz (Oryza sativa L.), em solos do Vale do Paraíba, no Estado de São Paulo. Os níveis de nitrogênio e fósforo foram de 0, 40 e 80 kg/ha; para o calcário, em solos orgânicos, de 5 t/ha, e nos argilosos de 3 t/ha; os micronutrientes entraram nas dosagens usuais. Os resultados mostraram sempre grande reação ao nitrogênio, inclusive à dose de 80 kg/ha. Para o fósforo, as reações foram muito menores, e somente em parte dos casos houve aumento de produção. Não se observou reação ao calcário e aos micronutrientes.<hr/>Thirtheen experiments were carried out at several places in the Paraíba Valey, São Paulo State, to study the effects of nitrogen, phosphorus and micronutrients fertilization, as well as of liming, on rice production. Nitrogen and phosphorus were applied at the levels of nihil, 40, and 80 kg/ha. Lime was applied at the levels of 5 and 3 t/ha in the organic and clayey soils, respectively. Seeds of the variety "Iguape-agulha" were utilized. Cultivation was under flooding system. Planting was done directly with the seeds. The results showed a great response of rice production to nitrogen fertilizer, wich was considerable even at higher dosis. Only in 6 out of the thirteen experiments, there was some response to phosphorus. No response to micronutrients or to liming could be noticed. <![CDATA[<b>Studies with lime and organic matter on paddy rice</b>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100027&lng=en&nrm=iso&tlng=en Foi conduzido experimento, no qual se procurou determinar as reações da cultura de arroz (Oryza sativa L.) à aplicação de calcário, matéria orgânica e adubos químicos minerais em solo de várzea irrigada, localizado no Vale do Paraíba. Os resultados obtidos em dois anos não mostram qualquer reação da cultura à aplicação de calcário ou de matéria orgânica, somente sendo observada resposta para a aplicação de fertilizantes minerais nitrogenados, fosfatados e potássicos.<hr/>An experiment was carried out in 1964 and 1965 in a clayey soil to determine the influence of lime and organic matter on rice (Oryza sativa L.) production, at Pindamonhangaba Experiment Station, Paraíba Valley. Organic matter (cow manure) was applied at the basis of 30 ton/ha/year. Lime was applied at the basis of 6 ton/ha in the first year and 2.5 ton/ha in the second year. There were also applications of fertilizer (NPK), in presence or absence of organic matter and lime. The results did not show response of rice production to lime or organic matter applications. These was, however, a clear response to the mineral fertilizers applied. <![CDATA[<B>Fertilizer experiments with corn XXVII</B>: <B>trials with various phosphorus sources (10<SUP>th</SUP> Series)</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100028&lng=en&nrm=iso&tlng=en Em 1962-63 foram conduzidas, em diferentes localidades do Estado de São Paulo, quatro experiências de adubação do milho com diversos fosfatos na presença de NK. Em uma das experiências, o efeito do fósforo foi praticamente nulo. Em média das outras três e dos seis fosfatos estudados, as doses de 60 e 120 kg/ha de P9O5 total proporcionaram aumentos de, respectivamente, 13 e 18 por cento. Em média das duas doses, o aumento devido ao superfosfato simples correspondeu a 683 kg/ha de grãos. Dando-se valor 100 a êste aumento, os índices referentes aos demais fosfatos seriam: termo fosfato, 127; mistura de 2/3 de superfosfato com 1/3 de apatita de Araxá, 75; fosforita de Olinda, 71; fosfato Alvorada, 56; apatita de Araxá, 37.<hr/>Four trials comparing six phosphorus fertilizers for the production of corn (Zea mays L.) were conducted in 1962-63 at different localities of the State of São Paulo. Practically no effect of phosphorus was observed in one of the trials. As an average of the other three experiments and of the six phosphates tested the yield increases due to the doses of 60 and 120 kg/ha of total P2O5 corresponded to 13 and 18 per cent, respectively. The average increase due to ordinary superphosphate was 683 kg/ha of grain. Giving the value 100 to this increase, the relative efficiencies of the other phosphates were: thermophosphate, 127; mixture of 2/3 of ordinary superphosphate and 1/3 of Araxá phosphate, 75; Olinda phosphate, 71; Alvorada phosphate, 56; Araxá phosphate, 37. The last three carriers are local rock phosphates. <![CDATA[<B>Interrelationship between cotton fiber quality and field properties as related to cotton yield, yarn strength and appearance</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100029&lng=en&nrm=iso&tlng=en As características tecnológicas da fibra - comprimento (UHM), uniformidade, resistência e índice micronaire - e mais a porcentagem de fibra, o pêso de 1 capulho e o pêso de 100 sementes foram estudados em relação à produção do algodão em caroço, resistência e aparência do fio. Foram calculadas várias equações, através de análises de regressão múltipla, para mostrar o grau de associação entre as três características consideradas respostas e as sete variáveis independentes mencionadas. Através da análise de regressão múltipla foi possível determinar a ordem de importância de cada variável em relação a uma resposta específica. O estudo foi realizado em 57 algodões diferentes, compreendendo variedades e linhagens, num total de 801 amostras, provenientes de nove localidades do Estado de São Paulo.<hr/>A study is presented regarding the relationship between cotton fiber and field properties and three responses: cotton yield yarn, strength and yarn appearance. Fiber properties such as upper half mean length, length uniformity, strength and micronaire fineness, and other characteristics such as percent lint, weight of one boll and weigth of 100 seeds are studied in relation to cotton yield, yarn strength and yarn appearance. Statiscal models were developed through multiple regression analyses to show the degree of relationship between three responses (cotton yield, yarn strength and appearance) and seven independent variables. Multiple regression analyses were carried out to determine the order of importance of each independent variable in relation to a specific response. The 57 cotton strains and varieties used in this study were obtained from 9 locations troughout the State of São Paulo, in a total of 801 samples. <![CDATA[<B>Effects of addition of boron on potato plant production</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100030&lng=en&nrm=iso&tlng=en São relatados os efeitos produzidos pela aplicação de bórax na cultura da batatinha (Solatium tuberosum L.), em solos de várzea irrigada do Vale do Paraíba. Quatro doses de bórax - 10, 20, 30 e 40 kg/ha - foram aplicadas de três maneiras distintas: no sulco de plantio, em cobertura (vinte dias após a germinação) e parceladamente em 4 pulverizações foliares semanais. As melhores doses de bórax foram as de 10 e 20 kg/ha, aplicadas no sulco de plantio, em mistura com os demais adubos. As aplicações em pulverização provocaram sintomas de toxidez nas folhas, notadamente as de maiores doses.<hr/>The production of potato plants (Solatium tuberosum L.) grown in alluvial soils of the Rio Paraíba Valey in the State of São Paulo, is not always correlated with high N-P-K fertilization. This has been reported to be due to boron deficiency in these soils. The effect of addition of boron at different rates (10, 20, 30 and 40 kg of borax / ha) applied in mixture with common NPK formulation in the furrow at planting time, as side dressing or by spraying, was studied in an area where symptoms of deficiency was observed in Aquila potato variety, in the previous year. An increase in the production of about 20 % was obtained with the addition of 10 or 20 kg of borax / ha in mixtures with NPK fertilizing formulation but not with the two higher doses. The same amount of borax applied by spraying also increased yield but at a lesser extent and the side dressing technique was less effective than the other two methods of application of borax. <![CDATA[<B>Evaluation of yield losses induced by potato leaf roll</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100031&lng=en&nrm=iso&tlng=en A comparação entre as produções de 50 pares de plantas sadias e afetadas, de nove variedades de batata, mostra que a redução na produção causada pela infecção secundária do vírus do enrolamento da fôlha foi, em média, de 60,8% no pêso total dos tubérculos produzidos e de 75,5% no pêso dos tubérculos do tipo graúdo ("especial" mais "primeira"). As perdas na produção total variaram de 44,6% (variedade Patrones) a 73,4% (variedade Aquila), e na de tubérculos graúdos, de 49,8% (Delta A) a 86,0% (Gunda).<hr/>A comparison of 50 pairs of field healthy and leaf roll infected potato plants of nine varieties indicated that the total yield reduction was on the average 60.7 per cent. Yield reduction of the two largest and most marketable potato sizes ("especial" and "primeira") reached 75.6 per cent. Aquila and Gunda had the highest yield losses (73.4 and 72.0 per cent); Delta A and Patrones had the lowest (47.6 and 44.6 per cent). Reduction in the yield of the larger tuber sizes was generally greater than total losses. <![CDATA[<B>Seazonal variation of Myzus persicae migrations at Campinas, during the years of 1967 to 1969</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100032&lng=en&nrm=iso&tlng=en Para estudar as variações sazonais do número de migrantes de Myzus persicae (Sulz.) em Campinas, foram utilizadas armadilhas de dois tipos, para a sua coleta: a de sucção e a de água. Fêmeas vivíparas, partenogenéticas, aladas, da espécie, foram coletadas em todas as semanas durante os anos de 1967, 1968 e 1969. A presença de alguns raros machos foi também registrada. A armadilha de água coletou sempre maior número de indivíduos do que a de sucção, durante todo o período de observações. Entretanto, as curvas que representam as variações semanais e mensais do número de migrantes da espécie, construídas com as amostras obtidas por ambos os tipos de armadilhas, têm a mesma forma. As maiores migrações se deram nos meses de maio a setembro. A proporção de exemplares de M. persicae em relação ao total das espécies coletadas foi sempre maior na armadilha de água do que na de sucção.<hr/>A study was made of the seazonal variations in the numbers of migrants of the aphid Myzus persicae (Sulzer) at Campinas, State of São Paulo, by sampling aerial populations from 1967 through 1969, with a suction trap and a yellow water trap. Weekly catches were recorded for both traps and summed up to give month totals. Alate viviparous parthenogenetic females of Myzus persicae were caught every week of the years of 1967 to 1969. This is an evidence that in the Campinas region (22° 50' S) there was no limiting factor to suppress parthenogenetic reproduction and inhibit flight during the period of observations. However, the trapping of males seems to indicate that an holocyclic multiplication of Myzus persicae may also exist. Where the oviparous female or other morphs of the species does also accur at Campinas, is not known. The period when most of migration took place as revealed by samples taken by both traps occurred from May to September. The yellow water trap caught more Myzus persicae than the suction trap, but curves of annual distribution of alates trapped have the same shape. The ratio between the numbers of this aphid in the two types of traps remained rather constant, throughout two years, varying from 2.3 to 6.0. This means that water trap catches were related to estimates of aerial density produced by the suction trap, a more precise apparatus for this determination, which does not exert attraction to the aphid species (20). Thus water trap may be used to the best advantage to collect Myzus persicae where an electricity supply to run the suction trap is lacking and / or when numbers of alate in the air are low. The proportion of Myzus persicae in relation to the total of species caught was also higher for the yellow water trap. In February, March, June, July and October of 1967 and June and July of 1968, 50% of aphid species caught in the water trap were Myzus persicae. It represents 35% of total caught from May to October of 1969. In the suction trap the highest proportion of this species was 20% in June, 1968. This difference is attributed to the selective attractiveness of yellow color to aphia species. <![CDATA[<B>Effect of some herbicides on okra crop in trials performed in the greenhouse</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100033&lng=en&nrm=iso&tlng=en Duas variedades de quiabeiro foram testadas, em condições de casa de vegetação, com solo de textura areno-barrenta, na sua tolerância para 16 herbicidas, cada qual aplicado em uma única dose. Dentre os herbicidas aplicados em pré-plantio incorporado o triflu-ralin destacou-se no combate às ervas daninhas gramíneas e não causou nenhum dano para a planta do quiabeiro. Os herbicidas cloroxuron, linuron, norea e propachlor mostraram ótimos resultados no cambate às ervas más e quanto à tolerância dessa malvácea. Do grupo das triazinas, todos os herbicidas usados nas condições do teste provocaram danos para o quiabeiro.<hr/>Two okra (Hibiscus esculentus L.) varieties were tested for their tolerance to sixteen herbicides at one rate each, as a pre-planting and as a pre-emergence applications in greenhouse trials. The results with the incorporated herbicides showed that only tri-fluralin at 0,75 kg/ha active ingredient was promising to this crop. Different results were obtained with the pre-emergence applications of the group of urea and anilide herbicides. While no symptoms of injury were observed with chloroxuron, norea, linuron, and propachlor, injury symptoms were evident with diuron, fluometuron, metobromuron and siduron. The four triazine herbicides were very damaging to the okra plants. Under the conditions of these tests, only the herbicides trifluralin, chloroxuron, norea, and linuron were promising to the okra crop. <![CDATA[<B>Nitrogenous, phosphatic and potassic nutrition of potato as revealed by foliar analyses</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100034&lng=en&nrm=iso&tlng=en Duas variedades de quiabeiro foram testadas, em condições de casa de vegetação, com solo de textura areno-barrenta, na sua tolerância para 16 herbicidas, cada qual aplicado em uma única dose. Dentre os herbicidas aplicados em pré-plantio incorporado o triflu-ralin destacou-se no combate às ervas daninhas gramíneas e não causou nenhum dano para a planta do quiabeiro. Os herbicidas cloroxuron, linuron, norea e propachlor mostraram ótimos resultados no cambate às ervas más e quanto à tolerância dessa malvácea. Do grupo das triazinas, todos os herbicidas usados nas condições do teste provocaram danos para o quiabeiro.<hr/>Two okra (Hibiscus esculentus L.) varieties were tested for their tolerance to sixteen herbicides at one rate each, as a pre-planting and as a pre-emergence applications in greenhouse trials. The results with the incorporated herbicides showed that only tri-fluralin at 0,75 kg/ha active ingredient was promising to this crop. Different results were obtained with the pre-emergence applications of the group of urea and anilide herbicides. While no symptoms of injury were observed with chloroxuron, norea, linuron, and propachlor, injury symptoms were evident with diuron, fluometuron, metobromuron and siduron. The four triazine herbicides were very damaging to the okra plants. Under the conditions of these tests, only the herbicides trifluralin, chloroxuron, norea, and linuron were promising to the okra crop. <![CDATA[<B>Leaf analysis in dry beans (Phaseolus vulgaris L.)</B>: <B>II. diagnosis of phosphorus requirement</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100035&lng=en&nrm=iso&tlng=en Duas variedades de quiabeiro foram testadas, em condições de casa de vegetação, com solo de textura areno-barrenta, na sua tolerância para 16 herbicidas, cada qual aplicado em uma única dose. Dentre os herbicidas aplicados em pré-plantio incorporado o triflu-ralin destacou-se no combate às ervas daninhas gramíneas e não causou nenhum dano para a planta do quiabeiro. Os herbicidas cloroxuron, linuron, norea e propachlor mostraram ótimos resultados no cambate às ervas más e quanto à tolerância dessa malvácea. Do grupo das triazinas, todos os herbicidas usados nas condições do teste provocaram danos para o quiabeiro.<hr/>Two okra (Hibiscus esculentus L.) varieties were tested for their tolerance to sixteen herbicides at one rate each, as a pre-planting and as a pre-emergence applications in greenhouse trials. The results with the incorporated herbicides showed that only tri-fluralin at 0,75 kg/ha active ingredient was promising to this crop. Different results were obtained with the pre-emergence applications of the group of urea and anilide herbicides. While no symptoms of injury were observed with chloroxuron, norea, linuron, and propachlor, injury symptoms were evident with diuron, fluometuron, metobromuron and siduron. The four triazine herbicides were very damaging to the okra plants. Under the conditions of these tests, only the herbicides trifluralin, chloroxuron, norea, and linuron were promising to the okra crop. <![CDATA[<B>Productivity of rubber tree clones cultivated in São Paulo</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100036&lng=en&nrm=iso&tlng=en Duas variedades de quiabeiro foram testadas, em condições de casa de vegetação, com solo de textura areno-barrenta, na sua tolerância para 16 herbicidas, cada qual aplicado em uma única dose. Dentre os herbicidas aplicados em pré-plantio incorporado o triflu-ralin destacou-se no combate às ervas daninhas gramíneas e não causou nenhum dano para a planta do quiabeiro. Os herbicidas cloroxuron, linuron, norea e propachlor mostraram ótimos resultados no cambate às ervas más e quanto à tolerância dessa malvácea. Do grupo das triazinas, todos os herbicidas usados nas condições do teste provocaram danos para o quiabeiro.<hr/>Two okra (Hibiscus esculentus L.) varieties were tested for their tolerance to sixteen herbicides at one rate each, as a pre-planting and as a pre-emergence applications in greenhouse trials. The results with the incorporated herbicides showed that only tri-fluralin at 0,75 kg/ha active ingredient was promising to this crop. Different results were obtained with the pre-emergence applications of the group of urea and anilide herbicides. While no symptoms of injury were observed with chloroxuron, norea, linuron, and propachlor, injury symptoms were evident with diuron, fluometuron, metobromuron and siduron. The four triazine herbicides were very damaging to the okra plants. Under the conditions of these tests, only the herbicides trifluralin, chloroxuron, norea, and linuron were promising to the okra crop. <![CDATA[<B>Survey for virus S in local and imported seed potatoes</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100037&lng=en&nrm=iso&tlng=en Duas variedades de quiabeiro foram testadas, em condições de casa de vegetação, com solo de textura areno-barrenta, na sua tolerância para 16 herbicidas, cada qual aplicado em uma única dose. Dentre os herbicidas aplicados em pré-plantio incorporado o triflu-ralin destacou-se no combate às ervas daninhas gramíneas e não causou nenhum dano para a planta do quiabeiro. Os herbicidas cloroxuron, linuron, norea e propachlor mostraram ótimos resultados no cambate às ervas más e quanto à tolerância dessa malvácea. Do grupo das triazinas, todos os herbicidas usados nas condições do teste provocaram danos para o quiabeiro.<hr/>Two okra (Hibiscus esculentus L.) varieties were tested for their tolerance to sixteen herbicides at one rate each, as a pre-planting and as a pre-emergence applications in greenhouse trials. The results with the incorporated herbicides showed that only tri-fluralin at 0,75 kg/ha active ingredient was promising to this crop. Different results were obtained with the pre-emergence applications of the group of urea and anilide herbicides. While no symptoms of injury were observed with chloroxuron, norea, linuron, and propachlor, injury symptoms were evident with diuron, fluometuron, metobromuron and siduron. The four triazine herbicides were very damaging to the okra plants. Under the conditions of these tests, only the herbicides trifluralin, chloroxuron, norea, and linuron were promising to the okra crop. <![CDATA[<B>Mineral composition of grape leaves of variety Seibel 2 grafted on ten different rootstock</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100038&lng=en&nrm=iso&tlng=en Duas variedades de quiabeiro foram testadas, em condições de casa de vegetação, com solo de textura areno-barrenta, na sua tolerância para 16 herbicidas, cada qual aplicado em uma única dose. Dentre os herbicidas aplicados em pré-plantio incorporado o triflu-ralin destacou-se no combate às ervas daninhas gramíneas e não causou nenhum dano para a planta do quiabeiro. Os herbicidas cloroxuron, linuron, norea e propachlor mostraram ótimos resultados no cambate às ervas más e quanto à tolerância dessa malvácea. Do grupo das triazinas, todos os herbicidas usados nas condições do teste provocaram danos para o quiabeiro.<hr/>Two okra (Hibiscus esculentus L.) varieties were tested for their tolerance to sixteen herbicides at one rate each, as a pre-planting and as a pre-emergence applications in greenhouse trials. The results with the incorporated herbicides showed that only tri-fluralin at 0,75 kg/ha active ingredient was promising to this crop. Different results were obtained with the pre-emergence applications of the group of urea and anilide herbicides. While no symptoms of injury were observed with chloroxuron, norea, linuron, and propachlor, injury symptoms were evident with diuron, fluometuron, metobromuron and siduron. The four triazine herbicides were very damaging to the okra plants. Under the conditions of these tests, only the herbicides trifluralin, chloroxuron, norea, and linuron were promising to the okra crop. <![CDATA[<B>Effects of planting time and cutting on the seed and green matter production of sunn hemp</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100039&lng=en&nrm=iso&tlng=en Duas variedades de quiabeiro foram testadas, em condições de casa de vegetação, com solo de textura areno-barrenta, na sua tolerância para 16 herbicidas, cada qual aplicado em uma única dose. Dentre os herbicidas aplicados em pré-plantio incorporado o triflu-ralin destacou-se no combate às ervas daninhas gramíneas e não causou nenhum dano para a planta do quiabeiro. Os herbicidas cloroxuron, linuron, norea e propachlor mostraram ótimos resultados no cambate às ervas más e quanto à tolerância dessa malvácea. Do grupo das triazinas, todos os herbicidas usados nas condições do teste provocaram danos para o quiabeiro.<hr/>Two okra (Hibiscus esculentus L.) varieties were tested for their tolerance to sixteen herbicides at one rate each, as a pre-planting and as a pre-emergence applications in greenhouse trials. The results with the incorporated herbicides showed that only tri-fluralin at 0,75 kg/ha active ingredient was promising to this crop. Different results were obtained with the pre-emergence applications of the group of urea and anilide herbicides. While no symptoms of injury were observed with chloroxuron, norea, linuron, and propachlor, injury symptoms were evident with diuron, fluometuron, metobromuron and siduron. The four triazine herbicides were very damaging to the okra plants. Under the conditions of these tests, only the herbicides trifluralin, chloroxuron, norea, and linuron were promising to the okra crop. <![CDATA[<B>Preliminary study on the control of mango anthracnose</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100040&lng=en&nrm=iso&tlng=en Duas variedades de quiabeiro foram testadas, em condições de casa de vegetação, com solo de textura areno-barrenta, na sua tolerância para 16 herbicidas, cada qual aplicado em uma única dose. Dentre os herbicidas aplicados em pré-plantio incorporado o triflu-ralin destacou-se no combate às ervas daninhas gramíneas e não causou nenhum dano para a planta do quiabeiro. Os herbicidas cloroxuron, linuron, norea e propachlor mostraram ótimos resultados no cambate às ervas más e quanto à tolerância dessa malvácea. Do grupo das triazinas, todos os herbicidas usados nas condições do teste provocaram danos para o quiabeiro.<hr/>Two okra (Hibiscus esculentus L.) varieties were tested for their tolerance to sixteen herbicides at one rate each, as a pre-planting and as a pre-emergence applications in greenhouse trials. The results with the incorporated herbicides showed that only tri-fluralin at 0,75 kg/ha active ingredient was promising to this crop. Different results were obtained with the pre-emergence applications of the group of urea and anilide herbicides. While no symptoms of injury were observed with chloroxuron, norea, linuron, and propachlor, injury symptoms were evident with diuron, fluometuron, metobromuron and siduron. The four triazine herbicides were very damaging to the okra plants. Under the conditions of these tests, only the herbicides trifluralin, chloroxuron, norea, and linuron were promising to the okra crop. <![CDATA[<B>Electron microscopical evidences for the multiplication of tobacco mosaic and vira-cabeça (Brazilian tomato spotted wilt) virus, within coffea leaf tissues</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100041&lng=en&nrm=iso&tlng=en Duas variedades de quiabeiro foram testadas, em condições de casa de vegetação, com solo de textura areno-barrenta, na sua tolerância para 16 herbicidas, cada qual aplicado em uma única dose. Dentre os herbicidas aplicados em pré-plantio incorporado o triflu-ralin destacou-se no combate às ervas daninhas gramíneas e não causou nenhum dano para a planta do quiabeiro. Os herbicidas cloroxuron, linuron, norea e propachlor mostraram ótimos resultados no cambate às ervas más e quanto à tolerância dessa malvácea. Do grupo das triazinas, todos os herbicidas usados nas condições do teste provocaram danos para o quiabeiro.<hr/>Two okra (Hibiscus esculentus L.) varieties were tested for their tolerance to sixteen herbicides at one rate each, as a pre-planting and as a pre-emergence applications in greenhouse trials. The results with the incorporated herbicides showed that only tri-fluralin at 0,75 kg/ha active ingredient was promising to this crop. Different results were obtained with the pre-emergence applications of the group of urea and anilide herbicides. While no symptoms of injury were observed with chloroxuron, norea, linuron, and propachlor, injury symptoms were evident with diuron, fluometuron, metobromuron and siduron. The four triazine herbicides were very damaging to the okra plants. Under the conditions of these tests, only the herbicides trifluralin, chloroxuron, norea, and linuron were promising to the okra crop. <![CDATA[<B>White Spike disease of wheat, a possible virus-induced abnormality</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100042&lng=en&nrm=iso&tlng=en Duas variedades de quiabeiro foram testadas, em condições de casa de vegetação, com solo de textura areno-barrenta, na sua tolerância para 16 herbicidas, cada qual aplicado em uma única dose. Dentre os herbicidas aplicados em pré-plantio incorporado o triflu-ralin destacou-se no combate às ervas daninhas gramíneas e não causou nenhum dano para a planta do quiabeiro. Os herbicidas cloroxuron, linuron, norea e propachlor mostraram ótimos resultados no cambate às ervas más e quanto à tolerância dessa malvácea. Do grupo das triazinas, todos os herbicidas usados nas condições do teste provocaram danos para o quiabeiro.<hr/>Two okra (Hibiscus esculentus L.) varieties were tested for their tolerance to sixteen herbicides at one rate each, as a pre-planting and as a pre-emergence applications in greenhouse trials. The results with the incorporated herbicides showed that only tri-fluralin at 0,75 kg/ha active ingredient was promising to this crop. Different results were obtained with the pre-emergence applications of the group of urea and anilide herbicides. While no symptoms of injury were observed with chloroxuron, norea, linuron, and propachlor, injury symptoms were evident with diuron, fluometuron, metobromuron and siduron. The four triazine herbicides were very damaging to the okra plants. Under the conditions of these tests, only the herbicides trifluralin, chloroxuron, norea, and linuron were promising to the okra crop. <![CDATA[<B>Studies on the storage of dry bean seed</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100043&lng=en&nrm=iso&tlng=en Duas variedades de quiabeiro foram testadas, em condições de casa de vegetação, com solo de textura areno-barrenta, na sua tolerância para 16 herbicidas, cada qual aplicado em uma única dose. Dentre os herbicidas aplicados em pré-plantio incorporado o triflu-ralin destacou-se no combate às ervas daninhas gramíneas e não causou nenhum dano para a planta do quiabeiro. Os herbicidas cloroxuron, linuron, norea e propachlor mostraram ótimos resultados no cambate às ervas más e quanto à tolerância dessa malvácea. Do grupo das triazinas, todos os herbicidas usados nas condições do teste provocaram danos para o quiabeiro.<hr/>Two okra (Hibiscus esculentus L.) varieties were tested for their tolerance to sixteen herbicides at one rate each, as a pre-planting and as a pre-emergence applications in greenhouse trials. The results with the incorporated herbicides showed that only tri-fluralin at 0,75 kg/ha active ingredient was promising to this crop. Different results were obtained with the pre-emergence applications of the group of urea and anilide herbicides. While no symptoms of injury were observed with chloroxuron, norea, linuron, and propachlor, injury symptoms were evident with diuron, fluometuron, metobromuron and siduron. The four triazine herbicides were very damaging to the okra plants. Under the conditions of these tests, only the herbicides trifluralin, chloroxuron, norea, and linuron were promising to the okra crop. <![CDATA[<B>Veinal necrosis, a malva disease caused by a virus of the potato x grup</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100044&lng=en&nrm=iso&tlng=en Duas variedades de quiabeiro foram testadas, em condições de casa de vegetação, com solo de textura areno-barrenta, na sua tolerância para 16 herbicidas, cada qual aplicado em uma única dose. Dentre os herbicidas aplicados em pré-plantio incorporado o triflu-ralin destacou-se no combate às ervas daninhas gramíneas e não causou nenhum dano para a planta do quiabeiro. Os herbicidas cloroxuron, linuron, norea e propachlor mostraram ótimos resultados no cambate às ervas más e quanto à tolerância dessa malvácea. Do grupo das triazinas, todos os herbicidas usados nas condições do teste provocaram danos para o quiabeiro.<hr/>Two okra (Hibiscus esculentus L.) varieties were tested for their tolerance to sixteen herbicides at one rate each, as a pre-planting and as a pre-emergence applications in greenhouse trials. The results with the incorporated herbicides showed that only tri-fluralin at 0,75 kg/ha active ingredient was promising to this crop. Different results were obtained with the pre-emergence applications of the group of urea and anilide herbicides. While no symptoms of injury were observed with chloroxuron, norea, linuron, and propachlor, injury symptoms were evident with diuron, fluometuron, metobromuron and siduron. The four triazine herbicides were very damaging to the okra plants. Under the conditions of these tests, only the herbicides trifluralin, chloroxuron, norea, and linuron were promising to the okra crop. <![CDATA[<B>Studies on storage of snap bean seeds</B>]]> http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051970000100045&lng=en&nrm=iso&tlng=en Duas variedades de quiabeiro foram testadas, em condições de casa de vegetação, com solo de textura areno-barrenta, na sua tolerância para 16 herbicidas, cada qual aplicado em uma única dose. Dentre os herbicidas aplicados em pré-plantio incorporado o triflu-ralin destacou-se no combate às ervas daninhas gramíneas e não causou nenhum dano para a planta do quiabeiro. Os herbicidas cloroxuron, linuron, norea e propachlor mostraram ótimos resultados no cambate às ervas más e quanto à tolerância dessa malvácea. Do grupo das triazinas, todos os herbicidas usados nas condições do teste provocaram danos para o quiabeiro.<hr/>Two okra (Hibiscus esculentus L.) varieties were tested for their tolerance to sixteen herbicides at one rate each, as a pre-planting and as a pre-emergence applications in greenhouse trials. The results with the incorporated herbicides showed that only tri-fluralin at 0,75 kg/ha active ingredient was promising to this crop. Different results were obtained with the pre-emergence applications of the group of urea and anilide herbicides. While no symptoms of injury were observed with chloroxuron, norea, linuron, and propachlor, injury symptoms were evident with diuron, fluometuron, metobromuron and siduron. The four triazine herbicides were very damaging to the okra plants. Under the conditions of these tests, only the herbicides trifluralin, chloroxuron, norea, and linuron were promising to the okra crop.