SciELO - Scientific Electronic Library Online

 
vol.34 issue11EFFECT OF TRICHOMES, ALELLOCHEMICALS AND MINERALS ON THE RESISTANCE OF LYCOPERSICON HIRSUTUM TO TOMATO LEAF MINERINITIAL GROWTH OF FOREST SPECIES OF DIFFERENT SUCCESSIONAL GROUPS IN RESPONSE TO PHOSPHORUS DOSES author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Pesquisa Agropecuária Brasileira

On-line version ISSN 1678-3921

Abstract

SHARMA, RAVI DATT  and  VIVALDI, LÚCIO JOSÉ. CONTROL OF MELOIDOGYNE JAVANICA BY PASTEURIA PENETRANS. Pesq. agropec. bras. [online]. 1999, vol.34, n.11, pp. 2065-2069. ISSN 1678-3921.  http://dx.doi.org/10.1590/S0100-204X1999001100013.

In a greenhouse experiment, the efficiency of Pasteuria penetrans against Meloidogyne javanica was evaluated on soybean cv. FT-Cristalina using four inoculum levels of P. penetrans viz: 0, 10x105, 50x105 and 100x105 endospores/kg of soil. Immediately after inoculating the autoclaved soil with P. penetrans, 1,000 second-stage juveniles were inoculated in each pot. After 48 hours of nematode inoculation, a 3-day old soybean seedling was transplanted in each pot. The experiment was evaluated in two steps of which the first evaluation was made after 89 days of transplanting the seedlings; and the second after 90 days of soybean sowing in sequence with a following period of 30 days. In the first evaluation, the highest fresh plant weight was observed in treatment with 100x105 endospores/kg of soil which differed significantly (P<0.05) from other treatments except the untreated control. The maximum increase in fresh pod weight of treatment with 100x105 endospores/kg of soil differed significantly (P<0.05) from the other treatments. The final nematode density in soil and roots for treatments 10x105, 50x105 and 100x105 endospores/kg of soil was significantly (P<0.05) lower than the untreated control. The nematode control obtained for treatments with 10x105, 50x105 and 100x105 endospores/kg of soil was 50.9%, 89.1% and 81.8% respectively. In the second evaluation, the control obtained for treatments 10x105, 50x105 and 100x105 endospores/kg of soil was 94.7%, 99.7% and 100%, respectively, in comparison to the untreated control. P. penetrans was highly efficient in the control of M. javanica even at the lowest concentration (10x105 endospores/kg of soil).

Keywords : Glycine max; soybean; root-knot nematode; population density; soil suppressiveness; biocontrol.

        · abstract in Portuguese     · text in Portuguese     · pdf in Portuguese