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韭菜生长至收割周期短,防治根蛆不能采用毒性大的农药,否则农药污染严重。要根据根蛆发生和危害特点,采取综合措施进行无公害防治。韭菜根蛆简称韭蛆,成虫叫迟眼蕈蚊。以幼虫群集在韭菜鳞茎等部位啃食为害,造成鳞茎腐烂,地上部茎叶倒伏、变黄、枯死。一般每年有3个活动危害盛期,分别为4月下旬至5月下旬,6月上旬至中旬,7月上旬至10月下旬。在4月下旬至5月下旬和7月下旬至10月下旬危害最盛。利用大棚和温室栽培韭菜,根蛆发生期相应提早和拉长,危害
Leek growth to the harvest cycle is short, the prevention of root maggots can not be toxic pesticides, or serious pesticide pollution. According to the root maggot occurred and the characteristics of harm, take comprehensive measures for pollution prevention and control. Leek root maggot referred to as leek maggots, adult beetle called fungus mosquitoes. The larvae cluster in the leeks and other parts of the grazing, causing bulb decay, aboveground stems and leaves lodging, yellowing and withering. In general, there are three activities that endanger the peak of the year, from late April to late May, early June to mid-June, early July to late October. In late April to late May and late July to late October the hardest. The use of greenhouses and greenhouse cultivation of chives, root maggot corresponding period earlier and elongated, harm