棉铃虫为害苹果的生态原因及防治柴全喜，何新朝，辛勤伟（城市职教中心）棉铃虫是棉花、小麦、花生、番茄等农作物的主要害虫。近年随着农业生态结构的变化，棉铃虫开始在果树上为害，而且有逐年加重的趋势。据调查，１９９１年我市苹果园有轻度发生．１９９２年较重，１... Ecological Causes and Control of Cotton Boll Worm-Damaged Apple Chai Quanxi, He Xinchao and Xin Qinwei (Urban Vocational Education Center) Cotton bollworm is a major pest of crops such as cotton, wheat, peanut and tomato. In recent years, with the changes of agricultural ecological structure, the cotton bollworm began to damage the fruit trees, but also increasing year by year. According to the survey, there was a mild occurrence of apple orchard in our city in 1991. 1992 heavier, 1 ...