SELETIVIDADE FISIOLÓGICA DE INSETICIDAS UTILIZADOS EM CULTURA CAFEEIRA SOBRE OVOS E ADULTOS DE CRYPTOLAEMUS MONTROUZIERI MULSANT

• Autor(a) principal: Rocha, L.c.d.
• Data de Publicação: 2020
• Outros Autores: Carvalho, G.a., Moura, A.p., Moscardini, V.f., Rezende, D.t. [UNESP], Santos, O.m.
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/1808-1657v77p1192010; http://hdl.handle.net/11449/211987
• topic: Sucking insects; ladybeetles; pesticides; coffee; selectivity; biological control; Insetos sugadores; joaninha; pesticidas; café; seletividade; controle biológico

On coffee plantations, the association between selective compounds and natural enemies composes an important tool for the pest management. The objective of this study was to evaluate some pesticides used on coffee plantations in regard to their lethal and sublethal effects on eggs and adults of Cryptolaemus montrouzieri Mulsant under laboratory conditions. The bioassays were carried out in the Laboratory of Selectivity Studies, Department of Entomology of the Universidade Federal de Lavras – UFLA, Brazil, under controlled conditions (climatic chamber) at 25 ± 2º C, RH of 70 ± 10% with a 12 h photophase. The pesticides and doses in g or mL of i.a. L-1 were: thiamethoxam (0.5), imidacloprid (0.7), mineral oil (13.3), endosulfan (2.63) and dimethoate (0.48). Distilled water was used as a control. The sprayings of the pesticides were accomplished using a Potter’s tower. The parameters evaluated were: specimen survival after the application of the compounds, oviposition and eggs viability. Thiamethoxam, imidacloprid and endosulfan were the most harmful to the treated individuals. When sprayed on eggs, thiamethoxam increased the embryonic period length (7.1 days). Mineral oil was the only compound that did not affect the reproduction of C. montrouzieri. In function of the selectivity presented by mineral oil, it can be recommended to be used in integrated pest management on coffee plantations in association with this predator.