危害大葱、大蒜、韭菜等根部(鳞茎)的主要害虫是葱蝇幼虫,俗称地蛆、根蛆。它的蛹藏于土中,成虫出土后交配,卵多产于植株根部附近潮湿的土壤表层,幼虫孵出后钻入鳞茎,蛀成孔道引起根部腐烂,叶片逐渐枯黄,导致植株死亡,在鳞茎类蔬菜烂母阶段受害最重,往往造成缺苗断行。防治地蛆方法:1.因葱蝇对人畜粪、发酵的有机物散发出的腐烂气味有趋性,故在施肥时应将有机肥料充分腐熟,并深施覆土,以减少其产卵的机会。2.草木灰对葱蝇有驱赶作用,可多施草木灰肥,最好施在植株的根部周围,以驱赶葱蝇产卵。 Harm the green onions, garlic, leeks and other root (bulb) of the main pests are onion fly larvae, commonly known as maggots, root maggots. Its pupae are found in the soil. After the adults are unearthed and mated, the eggs are prolific in the moist soil surface near the roots of the plants. The larvae bury into the bulbs after they hatch, causing the roots to decay and causing the leaves to turn yellow, causing the plants to die. Vegetable vegetables rotten mother stage most affected, often resulting in lack of seedlings broken line. Prevention and treatment of maggots: 1. As the onion fly on human and animal feces, fermented organic matter emitted decay smell tends to be, so fertilizers should be fully decomposed organic fertilizers, and deep soil cover, in order to reduce their chances of spawning. 2. Ash on the onion fly have a drive effect, can be more applied ash, it is best applied in the roots of plants around to drive the onion fly spawning.