在同一生态环境中,常常有多种农业昆虫同时存在。但由于这些昆虫的历史环境条件不同和生理遗传性的差异,对于同一气候的反应,甚至同一寄主的反应,可能相差很大。玉米螟是一种世界性大害虫。目前,对控制它大发生的各种防御措施,都有相当效果,取得很大成绩。 In the same ecological environment, there are often a variety of agricultural insects co-exist. However, due to the differences in the historical and environmental conditions and the physiological and heritability of these insects, the responses to the same climate and even the responses of the same host may vary greatly. Corn borer is a worldwide pest. At present, the various defensive measures that have taken place in controlling its occurrence have enjoyed considerable results and achieved great success.