药剂防治是控制棉铃虫为害的一项强有力措施。但在实际应用中,只有科学合理地使用农药。才能够提高防治效果,减缓抗药性的发展和避免药害的产生,达到保产增收之目的。 一、适时施药。在棉铃虫的卵孵化盛期至2龄幼虫盛发期施药。防治效果最好。一般在蛾高峰后3～4天和6～8天,为施药的关键时期,此后可参考防治指标而确定防治时期,适时施药;施药以上 Chemical control is a powerful measure to control the damage of cotton bollworm. However, in practical application, only pesticides should be used scientifically and reasonably. Can we enhance the effectiveness of prevention and control, slow down the development of drug resistance and avoid the occurrence of injury and harm, so as to achieve the goal of increasing production and increasing income. First, timely application of drugs. Helicoverpa armigera eggs hatch peak to 2 instar larvae Sheng Shi application. The best prevention and treatment. Generally in the moth peak after 3 to 4 days and 6 to 8 days, the key period for the application, after which reference to control indicators to determine the control period, timely application of pesticides;