山东省近几年积极采取措施,大力开展对棉虫的综合防治,两年挽回皮棉损失80～120万担。棉花害虫种类虽多,但北方棉区应把棉蚜和棉铃虫作为综合防治的主攻目标。一、棉蚜、棉铃虫的发生情况棉蚜自棉苗出土到棉花收获,全生育期都有发生。有两次为害高峰,5月下旬6月上旬为第一次为害高峰,称“苗蚜”;7月上中旬为第二次为害高峰,称“伏蚜”。棉苗在3片真叶前受害卷叶,称“堵门蜜”,对 In recent years, Shandong Province has taken active measures to vigorously carry out the comprehensive prevention and control of cotton insects and insect pests, and has recovered 80-120 million pigskin losses in two years. Although many types of cotton pests, cotton aphids and cotton bollworm should be the northern cotton area as a comprehensive prevention and control of the main target. A cotton aphid, the occurrence of cotton bollworm Cotton aphid unearthed from the cotton seedlings to cotton harvest, the whole growth period have occurred. There are twice the peak of damage, early May in late June as the first peak of damage, saying “seedling aphid”; in mid-July for the second peak of damage, said “aphids.” Cotton seedlings in the three true leaf suffered before the volume of leaves, said “plugging honey”, right