韭蛆以幼虫钻入韭菜假茎内,直食至茎盘,使之枯萎死亡,造成缺苗断条,严重的成片毁掉。河口大队1964年开始受害,1968年发展成毁灭性虫害,1973年受害面积2000余亩,占韭菜面积的87%。1978年开始对韭蛆的生活习性、消长规律和防治方法进行了研究。糖醋诱杀方法已推广2000余亩,具有效果明显、省工省钱,减少污染的优点。一、韭蛆的生活习性和消长规律韭蛆(经中国科学院动物研究所鉴定有异栉八方毛眼种蝇、葱种蝇、灰地种蝇、肖藜泉蝇)为双翅目、花蝇科,以蛹和幼虫越冬。在日均温度10～15℃时蛹大量羽化。成虫活动适宜温度为15℃左右。在大连地区4月下旬 Leek maggots larvae drill into the false stems of leeks, direct food to the stem plate, the withering death, resulting in lack of seedlings broken, serious pieces destroyed. The estuary brigade began to suffer in 1964 and developed into a devastating pest in 1968. In 1973, the area affected was over 2,000 mu, accounting for 87% of the leek area. In 1978 began to leek maggot life habits, growth and decline of the law and prevention methods were studied. Sweet and sour trapping methods have been promoted more than 2000 acres, with the effect of obvious, provincial workers to save money and reduce the advantages of pollution. First, the living habits of allium maggots and the growth and decline of leek maggots (Institute of Zoology Chinese Academy of Sciences have identified all kinds of octagonal eye eye fly species, onion species, gray land species flies, Xiao fierce spring flies) for the Diptera, To pupae and larvae wintering. In the average daily temperature of 10 ~ 15 ℃ when a large number of eclosion. Adult activity suitable temperature is about 15 ℃. In late April in Dalian