Toxicity and Lethal Effect of Greenhouse Insecticides on Coccinella septempunctata (Coleoptera: Coccinellidae) as Biological Control Agent of Myzus persicae (Hemiptera: Aphididae)

Deltamethrin and imidacloprid are commonly used insecticides for controlling sub-sucking insects in greenhouses. However, their application may cause sublethal effects on the aphid coccinellid predator Coccinella septempunctata (Coleoptera: Coccinellidae). Here, we study (i) toxicity effect of two doses (LD10 LD30) deltamethrin C. a laboratory microcosm (ii) residual greenhouse. The results showed that both reduced fecundity, longevity, intrinsic rate increase, finite increase net reproductive rate. developmental time fourth instar larvae was prolonged by at LD10 LD30. residues were toxic 21 DAT (days after treatment) to larvae. In contrast, began slightly harmful category (75%) 1 declined harmless (18.33%) DAT. These indicate have potential risks septempunctata. This provides information guide development integrated pest management (IPM) strategies