Resistência a inseticidas neurotóxicos e seus mecanismos em populações brasileiras de Leucoptera coffeella

• Autor(a) principal: Costa, Daianna Pereira
• Data de Publicação: 2013
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/2022
• topic: Bicho mineiro; Café; Pesticidas; Clorantraniliprole; Minados; Miner; Coffee; Pesticide; Clorantraniliprole; Mined; CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOSSANIDADE::ENTOMOLOGIA AGRICOLA

Among the pests incidents in the coffee leaf miner, the coffee, Leucoptera coffeella, is considered a key pest. The use of chemical control has been the main method used the continued use of pesticides can result in loss of efficacy and selection of populations of leaf miner resistant. To diagnose possible insecticide resistance in populations of the Brazilian miner, evaluated the responses of six populations of L. coffeella exposed to insecticides in different doses and times, and biochemical evaluation of caterpillars. The insecticides used were: abamectin (18 CE g de i.a./L), chlorantraniliprole (350WG g de i.a./L), chlorpyrifós (480 CE g de i.a./L), deltamethrin (25 CE g de i.a./L), profenofos (550 CE g de i.a./L), thiamethoxam (250 WG g de i.a./L) e thiamethoxam+cyproconazole (600 WG g de i.a./L). Biochemical assays were: the evaluation of total proteins, specific activity of enzyme phosphotriesterase, acetylcholinesterase and glutathione S-transferase. All populations of L. coffeella showed resistance to at least one insecticide. indicating that its use should be avoided. Populations resistant to the respective insecticides are: Abaeté dos Mendes-MG: chlorpyrifos, chlorantraniliprole and profenofós; Carmo do Paranaíba-MG: abamectin, chlorantraniliprole e deltamethrin; Franca-SP:thiamethoxam; Guaranhuns-PE: abamectin e chlorpyrifos; Rio Paranaíba-MG: chlorantraniliprole, deltamethrin, thiamethoxam+cyproconazole; Santa profenofos, Tereza-ES: thiamethoxam abamectin, e chlorpyrifos, deltamethrin and thiamethoxam+cyproconazole. Chlorpyrifos and profenofos in the present study showed cross-resistance. Insecticides with longer lethal in their populations, are: Carmo do Paranaíba-MG: deltamethrin; Rio Paranaíba-MG: deltamethrin; Abaeté dos Mendes-MG: chlorpyrifos; Guaranhuns-PE: chlorantraniliprole. The specific activity of the enzyme is involved in resistance phosphotriessterase the insecticide profenofos linking population of Franca-SP.