山东省桃蚜(Myzus persicae)对啶虫脒、吡虫啉的抗药性

采用浸叶生测法,测定山东省桃蚜5个田间种群(寿光、济南、泰安、烟台、临沂)对啶虫脒、吡虫啉两种常用杀虫剂的敏感性。结果表明:除烟台种群对吡虫啉尚处于敏感状态,山东省供试其他地区的桃蚜种群均对啶虫脒、吡虫啉产生了不同水平的抗性。相对于敏感种群,泰安种群对啶虫脒的抗药性最高,LC50为451.2641mg·L-1,相对抗性倍数为23.63;临沂种群对吡虫啉的抗药性最高,LC50为317.9446mg·L-1,相对抗性倍数为14.40;5个供试桃蚜田间种群对两种杀虫剂均未表现出高等及以上水平的抗药性。在实际防治桃蚜时,应注意与其他作用方式的杀虫剂交替轮换使用。

Studies on Myzus persicae Resistance to Acetamiprid and Imidacloprid in Shandong Province

Five peach aphid（Myzus persicae）populations were collected from vegetable fields in Shouguang，Jinan，Tai’an，Yantai，and Linyi locations of Shandong province to test their sensitiveness to commonly used acetamiprid and imidacloprid．The results indicated that Myzus persicae populations from different locations of Shandong Province had different levels of resistance to acetamiprid and imidacloprid，except population from Yantai was sensitive to Imidacloprid．Compared with the sensitive population，Tai’an population appeared to have the highest LC₅₀ for acetamiprid（451.264 1 mg·L^-1）with resistance ratio 23.63 fold．The highest resistance level to imidacloprid was recorded in Linyi，and the LC₅₀ amounted to 317.944 6 mg·L^-1 with resistance ratio 14.40．These 2 insecticides had not shown high and higher level drug resistance．In actual peach aphid control，we should pay attention to rotate application of other type insecticides.