Acetamiprid-induced response of biotransformation and antioxidant parameters in the codling moth Cydia pomonella (Lepidoptera: Tortricidae)

Abstract

Non-target adults of Cydia pomonella are exposed to insecticide concentrations that may not result in mortality. The present study evaluates the response of biotransformation and antioxidant parameters to acetamiprid-sublethal exposure of surviving adults from both a laboratory-susceptible strain (LSS) and a field population (FP). Activities of 7-ethoxycoumarine O-deethylase (ECOD), glutathione S-transferases (GST) and catalase (CAT), as well as glutathione (GSH) content were examined. The FP displayed a significantly higher ECOD basal activity than the one from LSS. Acetamiprid exposure in FP elicited a significant increase in ECOD activities. GSH content was significantly affected in LSS and FP adults treated with 100 mg/L of acetamiprid. The FP responded to acetamiprid with both an increase of ECOD activity and GSH content in a concentration-dependent manner. CAT and GST activities from both LSS and FP were mostly unaffected by the concentrations of acetamiprid evaluated. Obtained results are helpful in anticipating the development of resistant pest populations to insecticides.