地蛆也叫根蛆、粪蛆，省内常见的是种蝇、葱蝇、萝卜蝇（白菜蝇）和小萝卜蝇的幼虫。种蝇和葱蝇在省内一年发生３～４代，一般以蛹在土中越冬，３月下旬左右羽化为成虫，４月中旬及５月上旬为成虫发生盛期，喜欢集聚在臭粪和施入未充分腐熟的粪肥及有机质的地块活动。如果在这 Maggot also called root maggot, dung maggots, the province is common species flies, onion fly, radish fly (cabbage fly) and radish larvae. Flies and onion fly in the province occurred 3 to 4 generations a year, the general pupa in the soil overwintering, late March or so into adults, mid-April and early May adult peak occurs, like to gather in the stink of stink And the application of inadequate maturity of manure and organic matter plots activities. If here