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

Rafael A Pasini,Anderson D Grützmacher,Matheus Rakes,Franciele S De Armas,Juliano De B Pazini

doi:10.37486/2675-1305.ec04007

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.

Highlights

The predator Eriopis connexa (Germar, 1824) (Coleoptera: Coccinellidae) is an important biological control agent in wheat fields, that can feed on a large number of insect pests, especially the aphid complex that occurs in this crop
Our study aimed to evaluate the lethal effects of insecticides registered to control insect pests in the wheat crop on adults of E. connexa, using the standards proposed by the International Organization for Biological and Integrated Control (IOBC)
We evaluated male and female mortality as well as total mortality and IOBC selectivity classification at 24, 72 and 120 hours after exposure to dry residues of insecticide

Summary

Introduction

The predator Eriopis connexa (Germar, 1824) (Coleoptera: Coccinelidae), is an important biological control agent in wheat fields. Our study aimed to evaluate the lethal effects of insecticides registered to control insect pests in the wheat crop on adults of E. connexa, using the standards proposed by the International Organization for Biological and Integrated Control (IOBC).

Results

Conclusion