【摘要】 总结了吉林省梨园主要病虫种类及发展趋势 ;提出了病虫防治对策 ,并根据多年的生产实践经验 ,制定了吉林省梨园主要病虫害综合防治历 ,对梨树生产具有较强的指导意义。更多还原

【Abstract】 Species of main diseases and pests on pear trees in Jilin province and their developing trends were presented in this paper.Corresponding countermeasures and ways for controlling them were also suggested based on experiences gained in many years’practices,which will be helpful to pear-growers in this region.更多还原