Lethal effects of insecticides on adults of Eriopis connexa (Germar, 1824) (Coleoptera: Coccinellidae)

Rafael A. Pasini; Matheus  Rakes; Franciele S. De Armas; Juliano de B. Pazini; Anderson D. Grützmacher

doi:10.37486/2675-1305.ec04007

Authors

Rafael A. Pasini Centro de Ensino Superior Riograndense, Sarandi, Rio Grande do Sul, Brazil https://orcid.org/0000-0003-1223-9302
Matheus Rakes Federal University of Pelotas (UFPel), Pelotas, Rio Grande do Sul, Brazil https://orcid.org/0000-0003-1876-5717
Franciele S. De Armas Federal University of Pelotas (UFPel), Pelotas, Rio Grande do Sul, Brazil https://orcid.org/0000-0002-9367-1481
Juliano de B. Pazini University of Sao Paulo Luiz de Queiroz College of Agriculture, Piracicaba, São Paulo, Brazil. https://orcid.org/0000-0002-4350-1708
Anderson D. Grützmacher Federal University of Pelotas (UFPel), Pelotas, Rio Grande do Sul, Brazil http://orcid.org/0000-0002-5464-9337

DOI:

https://doi.org/10.37486/2675-1305.ec04007

Keywords:

Ladybug, biological control, chemical control, selectivity, Triticum aestivum

Abstract

The predator Eriopis connexa (Germar, 1824) (Coleoptera: Coccinelidae), is an important biological control agent in wheat fields. In this work, we evaluated the lethal effects of fifteen insecticides used in the wheat crop on adults of the predator E. connexa, using the methodology proposed by International Organization for Biological and Integrated Control (IOBC). Sublethal effects have not been evaluated. The insecticides were sprayed on glass plates that were used to set up the exposure arenas. The chitin synthesis inhibitors diflubenzuron SC, diflubenzuron WP, lufenuron, triflumuron, and the pyrethroid beta-cyfluthrin were considered harmless to adults of the predator and should have their use prioritized. On the other hand, methomyl, lambda-cyhalothrin, thiamethoxam + lambda-cyhalothrin A and B were considered harmful to E. connexa and should be avoided when adults of the predator are present in the crop.

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