小麦吸浆虫俗称麦蛆,属双翅目,癭蚊科。有麦红吸浆虫和麦黄吸浆虫两种,在大荔县主要危害的是麦红吸浆虫。小麦吸浆虫属毁灭性害虫,由于虫态个体小,幼虫在小麦灌浆期吸取小麦粒浆液而致使籽粒干瘪,危害隐蔽,虫量大,一旦暴发,产量损失惨重,一般年份可减产10%～30%,重发年份可损失小麦产量40%以上, Wheat midge, commonly known as wheat maggot, is a Diptera, Cynomolgus family. There are wheat midge and Apodemus two kinds of inhalation, the main hazard in Dali County is the Midge. Wheat midge is a destructive pest insects, due to individual small insect states, larvae in the wheat grain filling during grain filling and resulting grain shriveled, endanger the hidden, large amount of insects, once the outbreak, the yield loss, the general year can be reduced by 10% to 30% , Re-issue of the year can lose more than 40% of wheat production,