化学农药喷雾防治二代棉铃虫,大量杀伤天敌,常使伏蚜失去自然控制;过大放宽二代棉铃虫防治指标,棉花生长点易受棉铃虫为害而失去补偿能力。1986年以来,作者寻求保护天敌、控制二代棉铃虫、保护棉花生长点的施药方法,得到了理想的结果。 Chemical pesticide spray prevention and control of second generation bollworm, killing a large number of natural enemies, often make the aphid lose natural control; too much to relax the second generation cotton bollworm prevention and control indicators, cotton growing point vulnerable to bollworm damage and loss of compensatory capacity. Since 1986, the author has sought to protect the natural enemies, control the second generation cotton bollworm and protect the cotton growing point.