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• W2611700459 abstract "RESUMOO caruncho, Callosobruchus maculatus (Fabr.), e considerado a praga mais importante do caupi, Vigna unguiculata (L.) Walp.,armazenado em regioes tropicais e subtropicais. Visando minimizar os efeitos indesejaveis dos inseticidas quimicos sinteticos, o controledessa praga com oleos de origem vegetal vem se constituindo numa alternativa promissora, de baixo custo e segura para os aplicadores econsumidores. Foram testados os oleos essenciais [(Cymbopogon martini (Roxb.) J.F. Watson], Piper aduncum L., Piper hispidinervumC.DC., Melaleuca sp., Lippia gracillis Shauer) e fixos (Helianthus annuus L, Sesamum indicum L, Gossypium hirsutum L., Glycine max(L.) Merr. e Caryocar brasiliense Camb.), em graos de caupi, cv. Sempre Verde. Os oleos foram utilizados nas concentracoes 10, 20, 30,40 e 50µL/20g, correspondendo a 0,5, 1,0, 1,5, 2,0 e 2,5 L/t e impregnados aos graos no interior de recipientes de plastico, com auxiliode pipetador automatico e agitados manualmente durante dois minutos. Parcelas de 20g de caupi foram infestadas com oito femeas de C.maculatus, com 0 a 48 h de idade. Cada oleo foi testado, separadamente, em delineamento inteiramente casualisado com seis repeticoes.Os oleos essenciais de C. martini, P. aduncum e L. gracillis causaram 100% de mortalidade em todas as concentracoes, P. hispidinervuma partir de 1,5 L/t e Melaleuca sp. nas concentracoes de 2,0 e 2,5 L/t. A reducao do numero de ovos viaveis e de insetos emergidos foi de100% para todos os oleos essenciais, exceto Melaleuca sp. Por outro lado, os oleos fixos, apesar de apresentarem baixa mortalidade emtodas as concentracoes testadas, reduziram em praticamente 100% o numero de ovos viaveis e de insetos emergidos.Termos para indexacao: Caruncho do caupi, oleos vegetais, toxicidade, efeito inseticida, Callosobruchus maculatus, Vigna unguiculata.ABSTRACTThe weevil Callosobruchus maculatus (Fabr.) is considered the most important pest of cowpea, Vigna unguiculata (L.) Walp.,stored in tropical and subtropical regions. Focusing to minimize the undesired effects of synthetic chemical insecticides, vegetal originoils are a promissory alternative to control it because of its low cost and safety to the applicator and consumers. Essential oils[(Cymbopogon martini (Roxb.) J.F. Watson], Piper aduncum L., Piper hispidinervum C.DC., Melaleuca sp. and Lippia gracillis Shauer)and fixed oils (Helianthus annuus L., Sesamum indicum L., Gossypium hirsutum L., Glycine max (L.) Merr. and Caryocar brasilienseCamb.) were tested in cowpea grains (cv. Sempre Verde). These oils were used in concentrations of 10, 20, 30, 40 and 50µL/20g,corresponding to 0.5, 1.0, 1.5, 2.0 and 2.5 L/t and impregnated to the grains into the plastic recipients using an automatic pipette andhandly agitated for two minutes. Plots of 20g from cowpea were infested with eight females of C. maculatus from 0 to 48 hours old. Eachoil was tested separately in a randomly arrangement with six replicates. The essential oils of C. martini, P. aduncum and L. gracillisprovoked 100% of mortality in all concentrations, P. hispedinervum from 1.5 L/t and Melaleuca sp. in the concentrations of 2.0 and 2.5L/t. The reduction of the viable eggs and emerged insects was about 100%, except for Melaleuca sp. On the other hand, the fixed oils,in spite of its low mortality in all tested concentrations, reduced to almost 100% the number of the viable eggs and emerged insects.Index terms: Cowpea weevil, vegetal oils, toxicity, insecticide effect, Callosobruchus maculatus, Vigna unguiculata." @default.
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• W2611700459 title "ATIVIDADE INSETICIDA DE ÓLEOS ESSENCIAIS E FIXOS SOBRE Callosobruchus maculatus (FABR., 1775) (Coleoptera: Bruchidae) EM GRÃOS DE CAUPI (V igna unguiculata (L.) WALP.) Insecticide activity of essential and fixed oils in Callosobruchus maculatus (FABR., 1775) (Coleoptera: Bruchidae) in cowpea grains (Vigna unguiculata (L.) WALP.)" @default.
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