油桐尺蠖为害柑桔,但过去从未暴发成灾。1984年以来在我省大田等县发现此虫危害柑桔严重。1987、1988年本所柑桔园和邻近乡果园相继暴发。1987年9月本所受害较重的北乾果园受害株率达80％;较轻的后山、下洋片株受害株率也达10—20％。虫口密度每株20—100头,1988年6月初北乾果园受害株率达100％,每株有虫300—500头,个别株达1000多头。 Tung Tau Chi Chong citrus damage, but in the past never outbreak disaster. Since 1984, Datian County in our province found that the pest endanger the seriousness of oranges. 1987, 1988 citrus orchard and neighboring township orchard have been outbreaks. In September 1987, the victimized North Pecan Orchard affected 80% of the victims. The lesser strain rate of the light mountainous and subtropical plants was also 10-20%. Insect population density of 20 to 100 per plant, early June 1988 Peking Orchard damaged plant rate of 100%, each plant has 300-500 worms, individual strains of more than 1,000 heads.