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固安县北义后村是一个有百余年生产历史的鸭广梨产区,有混植梨园1000余亩。其中鸭广梨树占梨树总数的80％,其产量产值占梨产量产值总数的90％以上。另外零星分布有少量鸭梨、京白梨等。是一个以盛产鸭广梨为特点的果树专业村。1982-1989年,该村的鸭梨、京白梨每年都因梨黑星病发生造成不同程度损失:而鸭广梨很少见到病果,果实商品率一般可达90％以上。1990年该
Gu’an Beiyi Houcun is a Ya-Guangli producing area with a history of more than 100 years. There are more than 1000 mu of mixed pear orchards. Among them, Yaoguang pear tree accounts for 80% of the total number of pear trees, and its output value accounts for more than 90% of the total output value of pear. In addition scattered a small amount of pear, Beijing white pear and so on. Is a rich duck-pear fruit for the characteristics of professional village. 1982-1989, the village of pear, Jingbai pear every year due to pear scab caused varying degrees of loss: And Yaoguang rarely see the disease fruit, fruit commodity rate generally up to 90%. The 1990 year