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1.选用对路农药 据全国植保总站1992年统计,近年在棉田使用的农药仅杀虫剂就有50多种、混配剂60多种,但其中只有一部分对棉铃虫防治效果好,如敌杀死、氯氰菊酯、快杀敌、天王星、功夫、甲胺磷、甲基1605、辛硫磷、敌敌畏、万灵、棉铃宝、灭铃灵、新光1号、广杀灵、Bt乳剂等,防治时要“对虫下药”。 2.搞好虫情调查 防治棉铃虫的关键时期是产卵高峰期,因此防治前应做好虫情调查,或参考当地测报站的虫情预报。根据山东经验,当百株卵累计达30粒时为生物农药防治适期,百株卵达100粒时为化学农
1. Selection of pesticides on the road According to the statistics of the National Plant Protection Station in 1992, there are over 50 pesticide-only pesticides used in the cotton fields in recent years. However, only a few of them are effective against cotton bollworm, such as enemy Kill, Cypermethrin, Kill Enemy, Uranus, Kung Fu, Methamidophos, Methyl 1605, Phoxim, Dichlorvos, All Souls, Bollingau, Arlington, Shin Kong 1, When to “worm medicine.” 2 do a good job insect investigation Helicoverpa armigera control of the key period is the peak of spawning, so should do a good job prior to the prevention of insect surveys, or reference to the local news station insect prediction. According to the Shandong experience, when a total of 100 eggs when a total of 30 for the biological pesticide control period, when a hundred eggs up to 100 for chemical farming