桃蛀螟[Dichocrocis punctiferalis(Guenee)]又称桃蛀野螟,属鳞翅目、螟蛾科。它是杂食性的钻蛀性害虫,除为害苹果、桃等果树外,还为害玉米等农作物。近年来,随着本市种植业结构的调整,桃蛀螟为害玉米的程度也日趋严重,发生严重地块被害株率可达50%以上,已成为玉米穗期钻蛀性害 Dichocrocis medinalis [Dichocrocis punctiferalis (Guenee)], also known as peach borer, Lepidoptera, Pyralidae. It is omnivorous boring insects, in addition to the damage apple, peach and other fruit trees, but also damage to corn and other crops. In recent years, with the adjustment of planting structure in our city, the degree of maize damaged by the moth borer is also becoming more and more serious. The rate of serious victims in the block reaches more than 50%