Effect of Insecticides on Predatory Efficiency of Coccinella Septempunctata in a Prey Plant System

Changez Khan; Aslam Bukero; Shafique Ahmed Memon; Feroze Khan; Shahab Yousof; Swal Jan; Salman Peerjan; Yar Muhammad

Effect of Insecticides on Predatory Efficiency of Coccinella Septempunctata in a Prey Plant System

Authors

Changez Khan Student, Department of Entomology, Sindh Agriculture University Tandojam, Pakistan,
Aslam Bukero
Shafique Ahmed Memon Department of Entomology, Sindh Agriculture University Tandojam, Pakistan,
Feroze Khan Student, Department of Entomology, Sindh Agriculture University Tandojam, Pakistan
Shahab Yousof Student, Department of Entomology, Sindh Agriculture University Tandojam, Pakistan,
Swal Jan Student, Department of Entomology, Sindh Agriculture University Tandojam, Pakistan
Salman Peerjan Student, Department of Entomology, Sindh Agriculture University Tandojam, Pakistan
Yar Muhammad Student, Department of Entomology, Lasbela University of Agriculture, Water and Marine Science, Uthal, Pakistan

Keywords:

Coccinella septempunctata; , Insecticide compatibility; , Predatory efficiency; , Integrated Pest Management; , Sublethal effects

Abstract

The seven-spot ladybird (Coccinella septempunctata) is a key predator of aphids, whiteflies, leafhoppers, and mealybugs. However, the application of insecticides to control these pests can impair its predatory efficiency. This study evaluated the effects of four insecticides: imidacloprid, pyriproxyfen, abamectin, and acetamiprid on predatory feeding, aphid mortality, and foraging behavior of C. septempunctata in a treated cropping system, using a completely randomized sample contains five-replicate experimental design. The results showed that pyriproxyfen (T2) improved predatory feeding and foraging behavior in both males (26.6%) and females (29.6%), while imidacloprid (T1) resulted in the highest aphid mortality rate (67% in males, 71% in females). Pyriproxyfen also demonstrated superior predator-prey interaction. In contrast, imidacloprid proved most effective at controlling aphids and significantly reduced predation. The researchers found that pyriproxyfen was the most suitable insecticide for increasing the predatory efficiency of C. septempunctata, which exhibited the best performance in feeding and foraging, while imidacloprid resulted in the highest aphid mortality at the expense of predator activity. These results indicate that the compatibility of insecticides with natural predators is an essential aspect to consider for integrated pest management.

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Effect of Insecticides on Predatory Efficiency of Coccinella Septempunctata in a Prey Plant System