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地蛆是蝇类的幼虫。主要有葱蝇，为害葱、蒜、韭菜；萝卜蝇，为害自莱、萝卜等；种蝇，为害白莱、萝卜、葱、蒜头及瓜类、豆类蔬菜。受害的蔬菜，如洋葱、大蒜、葱及韭菜等幼苗和成株生长期叶片桔黄、萎蔫，如拔出来可见根或茎基部呈黄褐色，须根减少，有时可见到数量不等小白?
Maggots are flies larvae. There are mainly onion fly, harmful onions, garlic, leek; radish, harm from Levin, radish, etc .; species of flies, harmful to the Pak Lai, radish, onion, garlic and melons, beans and vegetables. Victims of vegetables, such as onions, garlic, onions and leeks and other seedlings and adult growth leaves orange, wilting, such as pull out to see roots or stem base was brown, fibrous to reduce, and sometimes can be seen ranging in number white?