无公害蔬菜病虫防治技术第一讲农业防治是无公害蔬菜病虫防治技术的基础易齐（全国农技推广服务中心１０００２６）编者按蔬菜是人们生活中的主要副食，在食物结构中占有重要地位。改革开放以来，蔬菜生产迅速发展，播种面积已达０．１亿ｈｍ２，蔬菜病虫害种类也随之明显... Prevention and control of pests and diseases of non-pollution vegetables Lecture 1 Agricultural prevention and control of pollution-free vegetables is the basis for pest control technology Yi Qi (National Agricultural Technology Extension Service Center 100026) Editor’s Note: Vegetables are the main non-staple food in people’s lives, occupy an important food structure status. Since the reform and opening up, the rapid development of vegetable production, sowing area has reached 10 million hm2, vegetable pests and diseases also will be obvious ...