桃蛀螟(Dichocrocis punctiferalisGuenee)是一种杂食性害虫,在我区主要为害石榴、桃、李、杏等果树。1988—1989年高粱田间偶见为害株。1990年在武都县河谷区2000亩高粱田普遍暴发,据在锦屏、城郊两乡的调查,紧穗高粱受害率为100％,虫口密度每株达2—12头,最高的达32头;散穗型高粱受害率也达10％以上。该虫以幼虫蛀食或 Dichocrocis punctiferalis Guenee is a omnivorous pest, which is mainly harmful to fruit trees such as pomegranate, peach, plum and apricot in our district. 1988-1989 occasional sorghum field damage strains. 1990 in Wudu County Valley area 2000 acres of sorghum field outbreaks, according to Jinping, suburbs of the two rural survey, the incidence of tight spike sorghum 100%, insect population density of 2-12 per plant, the highest of 32 ; Spike sorghum victimization rate of 10% or more. The worm infects larvae or