Potential overwintering ability of fall armyworm Spodoptera frugiperda (J.E.

Potential overwintering ability of fall armyworm Spodoptera frugiperda (J.E.

The growth, development, reproduction and distribution of Spodoptera frugiperda are closely related to environmental temperature. In order to clarify the overwintering ability of the insect in Anhui, artificial inoculation was used to simulate the survival status of S. frugiperda in winter. The larval survival rate, age and damage rate to plant were investigated, and the linear development model was used to predict the field development duration of different instars. The results showed that the mortality was 100% when the average temperature was below 10℃ for 8-10 days. The larvae inoculated on October 15 could not complete the full generation cycle. However, they could still damage corn, and the damage rate was 100% 30 d post inoculation. According to the temperatures between October 15 and November 18, the predicted developmental duration of eggs, larvae, pupae and the entire generation was 9.23 d, 46.86 d, 40.70 d and 69.38 d, respectively. The results provided scientific basis for monitoring and control of insect pests.