我们公社的秋白菜、萝卜年年遭受地蛆危害,一般植株危害率20～60％,个别地块达80～90％,造成秋菜质量低劣,商品率下降。近年来,社公组织了防治地蛆预测预报网,摸清地蛆发生规律,适时防治,取得了显著效果。地蛆是白菜蝇的幼虫,而防治成虫则是消灭地蛆的关键。为了准确摸清白菜蝇成虫的发生高峰,8月20日,选具有代表性 Our commune autumn cabbage radish suffer maggot year after year, the general plant hazard rate of 20 to 60%, 80 to 90% of individual plots, resulting in poor quality autumn vegetables, the decline in commodity rates. In recent years, social organizations organized maggot forecasting and prevention network to find out the rules of occurrence of maggots, timely prevention and treatment, and achieved remarkable results. Maggots are the larvae of cabbage flies, and the control of adults is the key to the elimination of maggots. In order to accurately find out the peak occurrence of adult cabbage fly, August 20, the election is representative