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.
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。
Forest insect pest and disease is one of the main factors influencing forest health.
森林病虫害是影响森林健康的主要因素之一。
According to observation on harmful characteristics of main forest insect pest, control measures have been put forward.
并对主要林木害虫的危害特点进行了观察，提出了防治策略。
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