根据第一代粘虫的发生为害情况及其影响因素,将诱蛾量、水分积分指数与田间幼虫发生量的关系进行统计分析,并运用分级处理的方法,提高了三者间的相关性,建立了预测式。通过验证,田间粘虫平均密度和最高密度的历史符合率都较高,为指导大面积上的防治提供了可靠的依据。 According to the occurrence of the first generation Mythimna separata and its influencing factors, the relationship between the number of induced moths, water integral index and the amount of field larvae was statistically analyzed, and the classification was used to improve the correlation among the three groups. Established a predictive formula. Through the verification, the historical coincidence rate of the average density and the highest density of armyworm in the field is high, which provides a reliable basis for guiding prevention and treatment on a large area.