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Controle químico de Anastrepha fraterculus (Wied.) (Diptera: Tephritidae) em laboratório Chemical control of Anastrepha fraterculus (Wied.) (Diptera: Tephritidae) in laboratory

By Priscila Lang Scoz, Marcos Botton and Mauro Silveira Garcia

Abstract

O efeito de quatro novos grupos químicos de inseticidas incluindo avermectina (benzoato de emamectina), éter piretróide (etofemprox), neoniconitnóide (imidacloprid, thiacloprid e thiamethoxan) e naturalyte (spinosad) foram avaliados em laboratório (25 &plusmn; 3&ordm;C, umidade relativa de 70 &plusmn; 10% e fotofase de 12 horas), visando ao controle de adultos e ovos/larvas de Anastrepha fraterculus comparando-os com os fosforados fenthion e thrichlorphon. O benzoato de emamectina não foi eficiente no controle de adultos de A. fraterculus via contato e ingestão. O etofenprox, imidacloprid, spinosad e thiamethoxan foram eficientes no controle de adultos de A. fraterculus via contato e ingestão, proporcionando maior mortalidade via ingestão. Os novos inseticidas não provocaram mortalidade significativa de ovos/larvas de A. fraterculus localizados no interior de maçãs, enquanto que os fosforados fenthion e thrichlorphon resultaram em 100% de mortalidade das fases imaturas e adultos. Os novos inseticidas apresentam potencial para uso nas iscas tóxicas, substituindo os fosforados para o controle de adultos.<br>The South American Fruit Fly, Anastrepha fraterculus is one of the most important pest of temperate fruit crops. The effect of four new inseticide groups to replace organophosphate compounds for A. fraterculus control was evaluated under laboratory conditions (25 &plusmn; 3&ordm;C, relative humity of 70 &plusmn; 10% and 12:12 L:D). Emamectin benzoate, etofenprox, imidacloprid, spinosad, thiacloprid and thiamethoxan were evaluated to control adults by contact and ingestion and against eggs/larvae inside apple fruits compared with fenthion and thrichlorphon. Emamectin benzoate was not efficient to control adults of A. fraterculus by contact and ingestion. Etofenprox, imidacloprid, spinosad and thiamethoxan were efficient to control adults by contact and ingestion being more toxic by ingestion. No new insecticide controlled eggs/larvae inside apple fruit while organophosphate compounds caused 100% of mortality of immature stages and adults. The new insecticides showed more potential to substitute organophosphate compounds in bait sprays for adult control

Topics: mosca-das-frutas sul americana, isca-tóxica, neonicotinoides, south american fruit fly, neonicotinoids, toxic bait, Animal culture, SF1-1100, Agriculture, S, DOAJ:Animal Sciences, DOAJ:Agriculture and Food Sciences, Agriculture (General), S1-972
Publisher: Universidade Federal de Santa Maria
Year: 2004
DOI identifier: 10.1590/S0103-84782004000600004
OAI identifier: oai:doaj.org/article:3c65f712036342cea1fa0801a74b6c0d
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