Using system science methods to study the system control of pest insect population, has an obvious social significance and practical value.

以系统科学方法研究害虫种群系统的控制，具有明显的社会意义和实践意义。

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Now there are a lot of questions in forecasting the plant diseases and insect pests in our agriculture, the content of the science and technology i.

农业灾害发生的频率和造成的损失也逐渐加大目前我国农业病虫害预报工作中存在着很多问题，总体来说科技含量偏低。

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Now there are a lot of questions in forecasting the plant diseases and insect pests in our agriculture, the content of the science and technology i.

农业灾害发生的频率和造成的损失也逐渐加大目前我国农业病虫害预报工作中存在着很多问题，总体来说科技含量偏低。

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