ABSTRACT: Eucalypts are the most planted hardwood in the world, with 30 million ha. under cultivation. There are approximately 700 species of eucalypts, but more than 90 % of the plantations are concentrated in nine species of the Subgenus Symphyomyrtus in the Sections Exsertaria, Latoangulatae and Maidenaria. Since 2000, with the advancement of biotechnology, many species have been reclassified and regrouped according to their morphological and physiological characteristics, DNA structure and geographic distribution. This work had as its objective the formulation of a critical analysis which presents the main characteristics that will identify the species of Eucalyptus of these new sections. The species are classified mainly according to geographic distribution, where crosses occur; as evolution in the subgenus Symphyomyrtus is preferably reticulated (with backcrosses), which makes it difficult to identify the rate by molecular and morphological markers. Environmental ecological similarity will define whether the hybrid will become a new species or regress to one parent and become an ecotype. The hybrid will become a new species when it has ecological characteristics different from its parents.

The paper and cellulose industry uses as a source of raw material wood only from harvested forests, either in one's own lands or in other people's cultivated land, through land lease agreement or forest development programs. The present work suggests the use of a method created to evaluate the impacts of technological innovations, the Inova-tec System with modifications, to evaluate the impacts of the 'Forest Incentive Program (Programa de Fomento Florestal) based on a Eucalyptus monoculture'. The method 'INOVA-Tec System' is a system that allows the analysis of: i) the scenario to develop the program, and ii) the performance evaluation of the program, through the analysis of indicators performance. With the data on hands, it is easier for the evaluator to elaborate his/her recommendation list to guarantee a proper culture management and the best impact management, in order to mitigate the potentially problematic characteristics for the environment and for the society.

A manga é uma fruta tropical climatéria que amadurece rapidamente depois de colhida. Avaliou-se a vida útil pós-colheita de mangas 'Surpresa' utilizando recobrimento com película de fécula de mandioca. Os frutos foram mergulhados em suspensões a 0; 1; 2 e 3% de fécula de mandioca por três minutos, secos ao ar e armazenados em temperatura ambiente (± 29º C e ± 87% de umidade relativa). O delineamento utilizado foi o inteiramente casualizado, em fatorial de 4 x 5 (tratamentos x tempo). Foram avaliados a perda de massa fresca (%), a firmeza do fruto e da polpa, a acidez total titulável, os sólidos solúveis totais, a relação SST/ATT e o pH, além das cores da casca e da polpa. Os frutos foram avaliados aos 0; 3; 6; 9 e 12 dias. Os frutos tratados com 3% de fécula de mandioca reduziram a perda de água e melhoraram o aspecto visual dos frutos, e a logevidade deste tratamento foi de 12 contra 7 dias da testemunha.

The mango is a tropical climacteric fruit that ripens quickly after having been picked. The useful postharvest life of 'Surpresa' mangos was evaluated using covering with cassava starch film. The fruits were immersed in suspensions to 1, 2 and 3% of cassava starch for three minutes, dried by the air and conserved in ambient temperature at ± 29º C of temperature and ± 87% of relative humidity. The outline used was entirely randomized and the experiment was carried out in 4 x 5 fatorial design (treatments x time). The loss of fresh mass (%), the firmness of the fruit and pulp, the total titratable acidity (TTA), the total soluble solids (TSS), the TSS/TTA relation and the pH, were evaluated besides of the colors of the peel and pulp. The fruits were evaluated on the 0, 3, 6, 9 and 12 days. The fruits treated with 3% of cassava starch reduced its loses of water and improved the visual aspect of the fruits, and the shelf life of this treatment was 12 against 7 days of the witness.