梨是我省栽培历史较久、分布面积大、总产量较高的树种。但是目前由于土、肥、水管理较差,不予修剪和病虫的危害,不少大片梨园收入不多,特别是梨大和梨小食心虫的危害,不但产量较低,虫口多,一些梨园仍存在有“十梨九砂”的情况。梨的产量和品质,都远远不适应社会主义革命和建设 Pear is a long history of cultivation in our province, the distribution area, the total output of higher tree species. However, due to the poor management of soil, fertilizer and water, no pruning and pest and insect pest damage, many large-scale pear orchards have little income, especially pears and pests. There are “ten pear nine sand” situation. The output and quality of pears are far from being adapted to the socialist revolution and construction