近几年,棉铃虫在武威市玉米田连年暴发成灾,年发生面积2.4万～3.1万hm2,占玉米种植面积的50%～70%。为摸清其发生规律,给防治提供依据,笔者于2002年进行了玉米不同种植方式对棉铃虫发生为害影响的试验。1材料和方法1.1供试材料玉米品种中单2号;小麦品种永良4号。1.2试验方法试 In recent years, the cotton bollworm in the maize field in Wuwei City, successive years of successive outbreaks, the annual area of ​​24,000 to 31,000 hm2, accounting for 50% to 70% of corn acreage. To find out the regularity of its occurrence and to provide the basis for prevention and treatment, the author conducted experiments on the damage of cotton bollworm in different planting methods in 2002. 1 Materials and methods 1.1 The test material Corn variety Zhongdan 2; wheat variety Yongliang 4. 1.2 test method test