粘虫发生期的予测,在防治工作中具有重要意义。由于我省春季3—4月份气温的年变化较大,粘虫发生期早晚差异也较悬殊。因此,利用有效积温法予测粘虫发生期要比期距法准确。现将其原理、有效积温资料及予测的方法介绍如下:一、有效积温法予测的原理昆虫为了完成一个发育阶段(一个虫期或一个世代),需要一定的温热积累,所经历的时间与该时间内的温度的乘积为一个常数,即 K=DT(K 代表积温常数,D 代表发 The prediction of armyworm occurrence is of great significance in prevention and control work. Due to the large annual variation of air temperature in spring from March to April in our province, the differences between the early and late occurrences of armyworms are also far-reaching. Therefore, the use of effective accumulated temperature method to predict the occurrence of armyworms than the period method is accurate. Now its principle, effective accumulated temperature information and methods to be measured as follows: First, the principle of effective accumulation of temperature law insects in order to complete a developmental stage (a worm or a generation), need some warm accumulation, experienced The product of the time and the temperature in the time is a constant, that is K = DT (K represents the constant of the temperature, D represents the hair