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误区之一:不查虫情,盲目打药 控制棉铃虫危害的关键是认真进行虫情调查,准确掌握虫口密度及其发育进度,抓住有利时机,进行科学防治。但在生产上,一些棉农不注重虫情调查,有的按照常规时间喷药,有的则“跟着邻居走”,看到别人在相邻棉田打药他也开始防治,结果防治时间不是提前就是延后,达不到理想的防治效果。 对策:搞好虫情调查,适时喷药防治 防治棉铃虫的关键时期是卵高峰期,即“治虫不见虫,药打卵高峰”;二代棉铃虫,当百株累计卵量在30粒时,为生物农药防治的适期,100粒时为化学农药防治的适期。在防治适期内,要注意连续喷药,而且两次喷药的间隔期不能太长,
Misunderstanding one: do not check the insects, blindly fight drugs to control the harm of bollworm key is to seriously investigate the insects, accurate grasp of population density and progress of its development, seize the favorable opportunity for scientific control. However, in terms of production, some cotton farmers do not pay attention to the investigation of insects and insects, some spray them according to the regular time, while others “follow their neighbors” and see others fighting drugs in neighboring cotton fields. As a result, the prevention and control time is not extended in advance After reaching the desired effect of prevention and treatment. Countermeasures: a good insect investigation, timely spraying prevention and control of cotton bollworm is the key period of egg peak, that is, “pest control insects, drug spawning peak”; second-generation cotton bollworm, when one hundred cumulative eggs in the 30 , For the biopesticide control of the appropriate period, 100 when the chemical pesticides for the appropriate period of prevention and treatment. In the appropriate period of prevention and control, pay attention to continuous spraying, and the interval between two spraying can not be too long,