终将舞毒蛾的种群密度控制在经济允许水平之下。
The species' density of the gypsy moth will be controlled under economic permitted level.
通过研究认为，花生蛴螬为害花生的经济允许受害水平以2 ~ 3%为宜。
It is considered that the economic injury level of the peanut white grub should be kept between 2% and 3%.
通过研究认为，花生蛴螬为害花生的经济允许受害水平以2 ~ 3%为宜。
It is considered that the economic injury level of the peanut white grub should be kept between 2% and 3%.
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