Effects of Feeding on Insect Larvae Treated With Pesticide on the Biological and Biochemical Characteristics of Arma chinensis

The effects of feeding on insect larvae treated with pesticide on the biological and biochemical characteristics of Arma chinensis were investigated. In the F₀ generation, the developmental duration and preoviposition period were shortened, the average number of eggs laid was reduced, and the net reproductive rate and mean generation time were significantly lower in the treatment group compared to those in the control group. The average number of eggs laid by the F₁ generation of A. chinensis was lower in the treatment group. The intrinsic rates of increase, finite rates of increase and net reproductive rates were significantly lower in the F₁ generation in the treatment group than those in the control group. The activities of CarE and GST were significantly induced, while the activity of AChE was inhibited in the A. chinensis in the treatment group. The activities of trypsin and THL were significantly induced in the treatment group, while the activity of LPS was not significantly changed. At the population level, Enterococcaceae were cultured only from the intestines of the A. chinensis in the treatment group. At the genus level, in addition to Serratia, Yokenella and Klebsiella, which were consistent with the control group, the genus Enterococcus was also cultured in the treatment group. When controlling P. rapae in the field, pesticides should be reasonably selected, and an appropriate time should be chosen for the release of A. chinensis to reduce the impact on natural enemies and to achieve synergistic chemical and biological control.