毒性特征
The use method, the pesticidal effect and the safe interval of some pesticides, including contacting killing type, systematic type, stomach toxic type and fumigant type, were brought forward on the base of the characteristic and the acting manner of some common chemical pesticide.
根据常用几种化学杀虫剂的特性、作用方式,研究了触杀型、内吸型、胃毒型、熏蒸型杀虫剂的使用方法、灭虫效果及安全间隔期。
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