The adverse effects of Spirodiclofen on some bioenergetics resources in Sunn pest, Eurygaster integriceps Put. (Hem. Scutelleridae)

Eurygaster integriceps is the key pest of wheat that overwinter as adults. The stored bioenergetic levels are important in their survival during the winter. In this research, the effects of sublethal concentrations (≤ LC30) of spirodiclofen (Envidor®) (240 SC), as an inhibitor of lipids biosynthesis, were studied on bioenergetic resources in adults of new generation under field conditions. The experiments were designed as factorial with three factor; spirodiclofen concentration (0, 100, 300 and 500 μl/l), sex (male and female) and sampling time (3, 6 and 12 days after treatment) and were replicated four times. The lipid, carbohydrate and protein levels were determined (mg/g; w/w). Results revealed that spirodiclofen affected significantly on bioenergetic resources. The lipid levels were increased with respect to control but carbohydrates and protein declined. Also the caloric contents were increased in 100, 300 and 500 μl/l levels respectively 1.37, 1.42 and 1.74 times. So that the sublethal concentrations of Envidor® increased the coloric contents and specialy the total lipids in sunn pest.