onion fly
noun
1- a small fly whose larvae are a pest of onions洋葱蝇。
1.1
- The European Delia antiqua (family Anthomyiidae), and the American Tritoxa flexa (family Otitidae), which also attacks garlic.欧洲的葱地种蝇（拉丁名Delia antiqua,花蝇科）和同样侵袭大蒜的美洲洋葱斑蝇（拉丁名Tritoxa flexa,斑蝇科）。