Effect of Different Diets on the Susceptibility ofInsecticides and the Activity of Detoxifying Enzymes in the Beet Armyworm, Spodoptera exigua

The susceptibility of the beet armyworm to methomyl,phoxim and deltamethrin, was various because of its feeding with different diets. Studies on detoxifying enzymes activities showed that the o demethylation of MFO and activity of CarE in the 3 rd instar larvae of spodoptera exigua,could be induced by different diets, and indicated that the K m value of CarE in the larvae reared on different diets were not distinctly different from that of the control.