英语语法分析

Susceptibility levels of grain aphids reared in the insectary to 16 pesticides are examined in Beijing and the toxicity base lines have been established.

用北京室内饲养的麦长管蚜以16种新老农药品种用点滴法进行了敏感水平测定，建立了麦长管蚜对16种供试农药的毒力基线。