本文论述了泰来县杨树苗木主要害虫种类，并提出了防治对策。
This article discusses kind of pests of piplar seedlings in Tailai county and puts forward control measures .
本文综述了水稻、大豆、苜蓿三大作物及其主要害虫的系统分析和模拟模型在国内外的主要研究成就。
The main research progress in China and oversea on system analysis and modeling for rice, soybean, alfalfa and their main insect pest ecosystem is surveyed.
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