通过室内饲养观察和田间调查，初步明确东台棉旱粮区玉米螟不同年度均有２代滞育越冬，滞育越冬的比例取决于光照、７月份的温度及不同食料。２代残虫在８月５日５龄幼虫有５０％转化为３代玉米螟，另外５０％及以下龄期的幼虫均滞育越冬。用此法折算每６６７ｍ２有效残虫，可准确预报３代玉米螟的发生期和发生程度。 Through indoor feeding observations and field surveys, it was initially clarified that two generations of diapause overwintering occurred in two generations of maize borer in the drought-hit areas of Dongtai, and the proportion of overwintering diapause was dependent on the light, temperature in July and different foodstuffs. The 2nd instar larvae were transformed into the 3rd generation Ostrinia furnacalis by 50% of the 5th instar larvae on August 5, and the larvae of 50% or younger were diaphanous. Using this method conversion per 667m2 valid residual worms, can accurately predict the third generation of corn borer occurrence and degree.