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一种药剂,开始使用时,杀虫效果往往很好,但随着用量不断增加和使用范围不断扩大,抗药性上升的案例不断出现。最突出的是顺式氰戊菊酯,也
An agent that starts with insecticidal effects tends to be good, but cases of rising resistance emerge as the dosage increases and the range of use increases. The most prominent is cis-fenvalerate, also