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农广天地【20150719】看点介绍
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农广天地20150719集剧情:第20150719期
林业害虫大肆进犯森林,我国森林每年受害面积高达800万公顷,经济损失远远超过了森林火灾,生态、社会损失更是难以估量;森防检疫工作者为消灭森林害虫,进行着长期而艰苦的工作。片中主要向观众朋友们讲解了:森林害虫的种类主要是:食叶性害虫和蛀干性害虫,以及它们的生活史,和对森林的破坏程度。害虫对树木造成的危害,及其原因的分析。最后还讲解了如何防治,大致可分成常规的防治方法,和用生物防治的方法。rnrn
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