梨小食心虫(Grapholitha molesta Bussck)是世界性果树害虫。在我国北方果区主要是为害桃、梨、杏等。尤其是桃梨混栽的果园为害更重。近年来,梨小在天津地区的为害非常普遍,有的年份曾经猖獗成灾。我场三队果园由于桃梨混栽,分别在1979、1981两年因梨小造成很大损失。现综合我场近几年来梨小为害的部分资料,试就其短、 Grapholitha molesta Bussck is a worldwide pest of fruit trees. In northern China fruit area is mainly pests, pears, apricots and so on. Especially Peach pear mixed orchard damage more serious. In recent years, pear small damage in Tianjin is very common, some years have been rampant disaster. My field orchard three peach pear mixed planting, respectively, in two years because of pears in 1979,1981 caused great losses. Now I synthesize the field pear in recent years some of the harmful information, try its short,