economic injury level

A study on the economic injury level of plateau pika ( Ochtona curzoniae ) and its control index

高原鼠兔的经济损害水平及防治指标研究

The experiment was conducted to estimate the economic injury level ( EIL ) and economic threshold ( ET ) of B. tabaci .

研究了烟粉虱在黄瓜上的经济损害水平和经济阈值。

On the economic injury level and the economic threshold of the cotton bollworm

棉铃虫的经济为害水平和经济阈值

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。

The results , which were obtained by testing and investigating the actual loss by damaging , indicated that the amount of leaves eaten reaches 35 % which is at economic injury level , namely , 4 larvae on a standard branch ( 50cm ) reach management index .

通过林间接虫试验和实际危害，食叶量为35%已达到危害经济阈值，即在长50cm标准枝上有4头幼虫，订为防治指标。