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一、查卵孵化率,定防治适期。方法是:在成虫盛发期后10天,选择小麦长势好的滩地或水浇地麦田2—3块,每块取五点,每点一平方米,调查粘虫卵块数量和孵化率。依此方法,每2—3天调查一次,当全部卵块的孵化率达80％左右时,既为喷药适期。二、查幼虫密度,定防治地块。方法是:当卵孵化率达到防治适期时,要立即对不同类
First, ovulation hatching rate, scheduled to prevent and control. The method is as follows: 10 days after the adult full-blown period, 2-3 or more wheat fields with irrigated wheat fields or irrigated fields are selected, each of which is taken at five o’clock and one square meter per point to investigate the number of eggs and the hatching rate of armyworm. According to this method, once every 2-3 days, once all the hatching rate of the egg reaches about 80%, it is suitable for spraying. Second, check the larvae density, set prevention and control plots. The method is: When the egg hatch rate reaches the prevention and control of the right time, should immediately different types