Physiological and Biochemical Responses to Sublethal Concentrations of the Novel Pyropene Insecticide, Afidopyropen, in Whitefly Bemisia tabaci MED (Q Biotype)

Bemisia tabaci is a devastating agricultural insect pest worldwide, and B. MED (formerly biotype ‘Q’) threatens the production of horticultural economic crops in China as growing number cases insecticide resistance have issued, highlighting requirement for alternative methods measures management. In present work, toxicities eight popular chemical agents, including novel pyropene afidopyropen, on adults were determined, then physiological biochemical responses to sublethal concentrations confirmed. Among all tested afidopyropen exhibited highest toxicity adult whiteflies (LC50: 7.38 mg/L). The effects studied at two concentrations, LC10 (0.53 mg/L) LC25 (1.84 mg/L), treatment extended duration growth stages reduced viabilities nymphal, pseudopupae, adults. egg-laying days eggs laid per female also decreased significantly, was hatchability treatment. Metabolic enzyme assays suggested that could be ascribable enhanced detoxification mediated by glutathione S-transferase. summary, our findings indicate can used agent management whiteflies.