粘虫是一种暴发性的害虫,幼虫在三龄前食量少且抗药力低,是防治的有利时期。但一至三龄为期很短,麦田一代粘虫不过7-8天,谷田三代粘虫仅5-6天,如果虫情检查不准,极易错过有利防治时机。因此,研究创制一种简单查虫工具,迅速查清田间真实的虫口数量与发育进度,对争取时间将粘虫消灭在低龄阶段是非常必要的。基于上述生产需要,我们在1964年改制了 Mythimna separata is an outbreak of pests and the larvae have low food intake and low resistance before the third instar and are good times to prevent and control. But the first to third age is very short, but the first generation of wheat field armyworms but 7-8 days, Gutian three generations of armyworms only 5-6 days, if the inspection of insects are not allowed to easily miss the opportunity to prevent and control. Therefore, it is very necessary to research and create a simple insect-finding tool to quickly find out the true number and development of insects in the field and to eliminate the time to eradicate armyworms. Based on the above production needs, we restructured in 1964