Laboratory evaluation of the effect of insecticides on chrysoperla carnea (neuroptera: Chrysopidae), forficula auricularia (dermaptera: Forficulidae), adalia bipunctata (coleoptera: Coccinellidae) and harmonia axyridis (coleoptera: Coccinellidae)

Abstract

The effect of 8 biopesticides and 23 synthetic pesticides on the eggs and larvae of Chrysoperla carnea (Stephens, 1836), adults of Forficula auricularia Linnaeus, 1758, larvae of Adalia bipunctata (Linnaeus, 1758) and adults of Harmonia axyridis (Pallas, 1773) have been evaluated under laboratory conditions. All of the tested biopesticides were harmless (causing mortality < 30%) or only slightly harmful (causing mortality 30-79%) to the tested natural enemies. The tested synthetic fungicides were harmless or slightly harmful, with the exception of myclobutanil, which was moderately harmful (causing mortality 90-99%) to A. bipunctata larvae. The tested synthetic insecticides were harmless or slightly harmful to C. carnea eggs and F. auricularia larvae. Various results were obtained for neonicotinoids ranging from the harmful effects (causing mortality > 99%) of thiacloprid on A. bipunctata larvae and H. axyridis adults to the harmless effects of acetamiprid on F. auricularia adults and C. carnea eggs. Thiacloprid, dodine and chlorpyrifos-methyl had effects on the behaviour of F. auricularia adults. The results confirmed the selectivity of the tested biopesticides that had no negative effects on the tested natural enemies.