Abstract:  Eurygaster integriceps is a key pest of wheat and barley in Iran. Neonicotinoid insecticides, a strong group of insecticides, have good effect on sucking pests. In this study, effects of four neonicotinods (thiametoxam, imidacloprid, dinotefuran and acetamiprid) on 3rd nymphs and adults of E. integriceps via two methods (contact and chemigation) were investigated. Although tested insecticides had no strong effect on E. integriceps in contact method and acceptable mortality was seen at very high concentration (5 000 mg/L a. i.), all insecticides had acceptable toxicity to nymphs and adults through chemigation bioassay. According to current results, using chemigation can be a novel method for management of this important pest.

Key words: Sunn pest (Eurygaster integriceps), neonicotinoids, toxicity, contact toxicity, chemigation, sucking pests