Influence of the Damage of Cotton Bollworm and Corn Borer to Ear Rot in Corn

The influence of cotton bollworm and corn borer on ear rot in corn was studied.The test varieties were Zhengdan958,Xianyu335 and Jundan20 which widely grown in North China.The result showed that the damage done by corn borer had more effect on ear rot in corn on the conditions of high rainfall and high humidity;however,cotton bollworm had more destructive effect on the conditions of low rainfall and low humidity.For one kind of insect,the ear rot was in favor of the condition of high rainfall and high humidity.