Efeito de extratos de barbatimão stryphnodendron coriaceum (benth.) na biologia de spodoptera frugiperda (smith. 1797) (lepidoptera: noctuidae).

frugiperda reared in laboratory in concentrations of 1%, 2%, and 4% and in an aqueous extract of 10%. We have verified that all treatments presented similar toxicities, with low percentage of feasibility only in the treatment with alcoholic extract with 1%, which 2% of individuals survived, while in other treatments the feasibility was null. On the second evaluation realized in laboratory, the aqueous extract from leaves of S. coriaceum were added to the artificial diet in different concentrations (1%, 2%, 4%, 8%) and all concentrations demonstrated some effect on the biology of S. frugiperda, having the most significant effects in the most elevate concentrations as low larval feasibility, extending the larval period, and reducing the weight of pups, beyond reducing the oviposition rate as well. In greenhouse, the aqueous extract from leaves of S. coriaceum reduced the damage of defoliation provoked by the caterpillar of S. frugiperda in corn plants, it reduced the caterpillar population and also obtained a percentage of efficiency approximate to the one verified with the treatment of extract from leaves of nim. Key-words: Alternative control, barbatimão, Insecticide plants, Vegetable extracts 1. INTRODUÇÃO GERAL Existem vários métodos ou estratégias para o controle de inseto praga, à aplicação de compostos químicos organossintéticos, chamados inseticidas, tem sido o método mais utilizado pelos agricultores, seja pelo rápido resultado que eles…

tecnologia inovadora e ecológica para fundição de alumínio. WB COM. E REPRESENTAÇÕES E CARBONÍFERA BELLUNO NINGBO A Carnonífera Belluno Ltda, que atua nas áreas de Mineração de Carvão Mineral, Transporte e Comunicação Radiodifusão, desde 1991, juntamente com a sua representante comercial, a WB COM, participa do Evento desde 2001. Nesta edição da Feira, ambas apresentaram o carvão mineral moído Cardiff. A companhia chinesa Ningbo Firewheel Thermal Insulation and…