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根蛆是大蒜（蒜苗）、韭菜、葱等蔬菜的一种重要害虫。目前，棚室内生产的蒜苗、韭菜为了防止此虫及其它害虫的为害，大都采用喷药防治的方法，更有甚者采用土施呋喃丹或用三九———药液灌根。虽然达到了防治目的，但是，农药残留量很高，特别是呋喃丹和三九———均为高毒剧
Root maggots are garlic (garlic), leeks, onions and other vegetables is an important pest. At present, the indoor production of garlic shoots, leeks in order to prevent the pests and other pests damage, most of the methods used to control spraying, even worse soil carbofuran or use 39 --- Herbal irrigation. Although the purpose of prevention and treatment has been reached, the amount of pesticide residues is very high. In particular, carbofuran and 39 are highly toxic