大麦水蝇(Hydrellia griseola Fall)属双翅目,水蝇科,毛眼水蝇亚科,群众称叶鞘潜蝇。据报导,该虫曾在四川省及陕西省关中地区发生为害。近年来调查,我省中部的陇西、临洮、渭源和陇南的岷县、武都等县都有发生,为害程度有加重趋势,已成为 Hydrellia griseola Fall is a family of Diptera, Waterfly, Waterfly subfamily, and the masses are called Leaf-leaf miner. It was reported that the worm had been harmed in Sichuan and Shaanxi provinces. In recent years, surveys have been conducted in Longxi, Linqu, Weiyuan and Minnan counties and Wudu counties in the central part of our province. The degree of harm is aggravating and has become