Residual toxicity of four insecticides on larvae and adults of the predator Chrysoperla externa (Hagen, 1861) (Neuroptera: Chrysopidae).

The objective was to evaluate the residual action of the insecticides acetamiprid + etofenprox, spinetoram, indoxacarb and methoxyfenozide on the predator Chrysoperla externa Hagen, 1861 (Neuroptera: Chrysopidae). The bioassays followed the methodologies proposed by the International Organization for Biological and Integrated Control (IOBC). The insecticides were sprayed on grapevine plants cv. Burgundy, using the maximum recommended field dosage for fruit trees. Larvae and adults of the predator were exposed to leaves containing the insecticide residues, at 3, 10, 17, 24 and 31 days after spraying, to determine the residual effect on the following biological parameters: mortality, fecundity and fertility. Based on the toxicity observed during the bioassays, the insecticides were classified according to the IOBC persistence scale. Spinetoram was classified as moderately persistent to larvae and slightly persistent to adults, indoxacarb also he was considered persistent for larvae and as a short-lived for the adult stage of the lacewing, thus showing the difference in susceptibility between the stages of development of C. externa. The insecticides acetamiprid + etofenprox and methoxyfenozide are the most suitable for ecologically safe application, in areas where the predator occurs because they are classified as short-lived insecticides for the larval and adult stages of C. externa.

Bibliographic Details

Main Authors:	ARMAS, F. DE, RAKES, M., PASINI, R. A., ARAÚJO, M., NAVA, D. E., GRUTZMACHER, A. D.
Other Authors:	FRANCIELE DE ARMAS, REHAGRO; MATHEUS RAKES, UNIVERSIDADE FEDERAL DE PELOTAS; RAFAEL ANTONIO PASINI, SERVIÇO NACIONAL DE APRENDIZAGEM RURAL; MIKAEL ARAÚJO, UNIVERSIDADE FEDERAL DE PELOTAS; DORI EDSON NAVA, CPACT; ANDERSON DIONEI GRUTZMACHER, UNIVERSIDADE FEDERAL DE PELOTAS.
Format:	Artigo de periódico biblioteca
Language:	Portugues pt_BR
Published:	2023-11-28
Subjects:	Crisopídeo, Controle Químico, Controle Biológico, Fruta de Clima Temperado, Inseticida,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1158775 https://dx.doi.org/10.1590/0100-29452023926
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