利用“虫(螨)日”建立时间动态经济受害水平的研究方法

A research method of using 'insect (or mite) days' for establishing time dynamic EIL

本文以苹果叶螨为研究材料,阐述了应用‘虫(螨)日’建立时间动态经济受害水平的方法。研究表明:第一,由于虫(螨)日指数概括了害虫(或害螨)危害的基本过程,故由虫(螨)日与产量损失率作出的EIL和ET模型将更为可靠;其次,所得EIL和ET不是某时刻的单一虫(螨)口密度指标,而是时间动态的虫(螨)口密度和累积虫(螨)日指数综合指标;第三,这种建模方法不必考虑虫(螨)的自然存活率。

With european red mite (Panonychus ulmi) as an example, the author inquired into the method of using 'insect (or mite) days' for establishing time dynamic EIL. It is consi dered that firstly, the EIL from 'insect (or mite) days' contained the fundamental information of insect or mite injury; Secondly, 'insect (or mite) days' EIL is a time dynamic one,not belonging to an one-time EIL; Thirdly,the modelling needs rot consider the survival rate of injurious insect or mite.