五查五看五定法防治棉铃虫一、查蛾蜂，看卵色，定防治适期。棉铃虫在我省一年发生四代。其中二、三、四代主要在棉田危害。每代都有始、盛、末期。二代棉铃虫于６月上旬开始，三代于７月中旬开始，四代于８月中旬开始。调查时，选择现蕾早（二代）、蕾铃多（三代）和贪青... Five to five to see five methods to prevent and control bollworm First, check the moth bee, look at the egg color, will prevent and control period. Cotton boll worm occurs in our province four generations a year. Among them, two, three, four major hazards in the cotton field. Each generation has a beginning, Sheng, the end. The second generation of cotton bollworm began in early June, the third generation began in mid-July, the fourth generation began in mid-August. Investigation, the choice of budding early (second generation), Lei Ling and more (three generations) and greedy ...