1992年烟台市棉铃虫为害苹果严重。我们在栖霞、海阳、牟平、福山、招远、莱州等地不完全统计,受棉铃虫严重为害的果树达30多万亩。幼树及结果初期果园发生较重、间作番茄、花生等作物的果园受害最重。卵多产在苹果新梢的幼叶上。初孵幼虫多在未展的幼叶内取食,也可蛀入茎内,造成生长点死亡。 In 1992 Yantai cotton bollworm damage apple serious. We in Qixia, Haiyang, Muping, Fukuyama, Zhaoyuan, Laizhou and other places incomplete statistics, seriously affected by the bollworm fruit trees up to 30 million mu. Saplings and the results of the early orchard occurred heavier, intercropping tomatoes, peanuts and other crops orchards most affected. The egg is prolific on young leaves of apple shoots. Newly hatched larvae in the unscheduled young leaves to eat more, but also bore into the stem, causing the growth point of death.