author(s)
Karuppaiah V, Chitra Srivastava and Subramanian S

abstract
A study was conducted to establish insecticides metabolic enzymes activity among three different strains of S. litura (Noctuidae: Lepidoptera). Metabolic enzymes, viz., Carboxylesterase, Glutathion-S-transferase and Cytochrome P450 monooxygenase were estimated using standard methodology. Elevated level of CarE (28.09 µmol) observed in Sonepat strain, followed by Delhi strain (26.72 µmol) min ^-1 mg ^-1 of protein. Varanasi strain registered enhanced GST activity (1.380 µmol min ^-1 mg ^-1) and cytochrome P450 monooxygenase (19.31 µmol min ^-1×mg ^-1). Variation in detoxification enzymes activity among S. litura strains could be attributed due to insecticide usage pattern.