The Study Progress of the Economic Threshold of Injurious Insect Control
害虫防治经济阈值研究进展
The small brown rice planthopper is an injurious insect on food crop of Ningxia.
灰飞虱是宁夏粮食作物上的一大害虫。
Biological Characteristics of Main Forest Tree Injurious Insect and Controlin Tahe Forestry Bureau
塔河林业局主要林木害虫生物学特性及其防治研究
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