Study on Ovicidal and Side Effects of Diazinon and Imidaclopride on Cryptolaemus Montrouzieri Mulsant (Coleoptera: Coccinellidae)

Abstract

Lethal and sub lethal effects of two insecticides, diazinon and imidaclopride, were studied on Cryptolaemus montrouzieri Mulsant (Coleoptera: Coccinellidae) in the laboratory conditions. The newly laid eggs of C. montrouzieri were exposed to the insecticides by dipping method. The obtained results indicated that diazinon and imidaclopride were moderate toxic (33-66%) to egg of C. montrouzieri (according to IOBC standard method). The significant differences were observed for pupal period, post oviposition, longevity and gross fecundity rate (GFR), Mean eggs per day, net reproductive rate (R0) and doubling time (DT) of C. montrouzieri between two examined insecticides. Imidaclopride showed the highest inhibiting effect on stable population growth parameters of C. montrouzieri.