Insecticide Susceptibility and Mechanism of on Different Host Plants.

(J. E. Smith) is a worldwide economically important crop pest. Although the individuals of that invaded China have been characterized as the corn strain, they also have the ability to damage other crops in China. The physiological and behavioral responses of to different host plants are poorly understood. In the present study, we investigated the host plant preference, fitness costs, and differences in detoxification gene expression and microbiome composition between two strains that fed on different crop plant diets. The results showed that larvae exhibited no obvious preference for corn or rice, but significant suppression of development was observed in the rice-fed strain. In addition, the corn-fed strain showed higher insecticide tolerance and detoxification enzyme activities than the rice-fed strain. Moreover, multiple detoxification genes were upregulated in the corn-fed strain, and microbiome composition variation was observed between the two strains. Together, the results suggest that population-specific plasticity is related to host plant diets in . These results provide a theoretical basis for the evolution of resistance differences in and are helpful for designing resistance management strategies for aimed at different crops.