近年来,随着耕作制度的改变,京郊套种玉米种植面积不断扩大,玉米虫害的发生及危害情况也发生新的变化。如过去已基本控制为害的粘虫、玉米螟在套种玉米上的发生为害都有加重的趋势,严重影响着套种玉米大幅度增产。又如改制后,出现了蚜虫、蓟马、棉铃虫对套种玉米的危害,在局部地 In recent years, with the change of farming system, the planting area of ​​intercropped maize in Beijing suburbs has been continuously expanded, and new changes have taken place in the occurrence and damage of maize pests. In the past, such as armyworm, corn borer that had been basically controlled to harm in the past had the aggravating trend of damage on intercropping maize, which seriously affected the substantial increase of intercrop corn. Another example is the restructuring, appeared aphids, thrips, cotton bollworm interception of maize harm, locally