Rice stem borer is the main pest on rice in Zhejiang province.
稻螟为浙江省水稻的主要害虫。
The damage process of paddy stem borer to rice plant can be regarded as a single input-single output system.
三化螟为害水稻的过程可以看作一个单输入——单输出系统。
Dynamic analysis of poplar stem borer was done with population density, crowded level and percentage of damaged trees on sample plots.
本文采用平均虫口密度、拥挤度和被害株率作为标准地的指标,对杨树蛀干害虫的危害状况作动态分析。
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