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韭菜生活力强,易管理,全省种植面积较大。但韭蛆一直是影响其产量的重要因素,造成鳞茎腐烂、干枯,缺株断垄。且部分菜农防治不当,使用高毒农药,使消费者中毒事故时有发生。一、韭蛆的种类及发生特点韭蛆主要包括迟眼蕈蚊、葱蛆和种蝇3种,其中以迟眼蕈蚊发生最为普遍,危害最为严重。迟眼蕈蚊在山东一年发生4代,以幼虫在韭菜鳞茎内或韭根周围3～4cm表土层危害最为严重,危害期为6～10月份。成虫善于飞翔,喜阴湿弱光环境下活动,以9～11时最为活跃,为交尾盛时,下午4时到夜间栖息于
Leek strong vitality, easy to manage, the province planted a larger area. However, leek maggots have always been an important factor affecting their production, resulting in decayed bulb, dry, lack of broken line ridge. And some farmers improper prevention and control, the use of highly toxic pesticides, poisoning accidents occur from time to time. First, the types of leek maggots and the occurrence characteristics Leek maggots include larvae maggots, onion maggots and three kinds of species of flies, including the fungus mosquito occurs the most common, the most serious harm. Lesser mostae mosquitoes occur in Shandong 4 generations a year to larvae in the leeks or leek root around 3 ~ 4cm top soil hazards, the hazard period of 6 to 10 months. Adults are good at flying, hi shade and wet light environment activities, to 9 to 11 when the most active, for the mating end of Sheng, 4 pm to night habitat