华南地区桃蚜对7种杀虫剂的抗药性研究

在室内分别采用叶片浸渍法和叶柄浸渍法测定了华南地区6 个桃蚜种群对7 种杀虫剂的抗性水平。结 果表明、6 个桃蚜种群对吡虫啉产生的抗性水平最高、抗性倍数在28.0~51.5 之间。湖南郴州市尧广东韶关市尧广东梅 县和惠州市惠阳4 个监测点的桃蚜种群对硫丹产生了低水平抗性或者敏感性下降（抗性倍数分别为3.6尧3.8尧5.1 和 7.2）。广州市天河区小白菜和惠州市惠阳区甘蓝上的桃蚜种群对联苯菊酯产生了低水平抗性（抗性倍数分别为9.6 和7.7）、湖南郴州市监测点甘蓝上的桃蚜种群对丁硫克百威产生了低水平的抗性（抗性倍数8.1）。其他监测点的桃 蚜种群对硫丹尧毒死蜱尧联苯菊酯尧丁硫克百威尧抗蚜威和烯啶虫胺均产生了中等水平的抗性、抗性倍数在10.6~28.0 之间。

Resistance of Myzus persicae populations in South China to seven pesticides

Resistant level of six Myzus persicae populations in South China to seven pesticides were tested. Results showed that the six populations developed the highest resistance level to imidacloprid with resistant index from 28.0 to 51.5. Four populations from Chenzhou (Hunan province), Shaoguan (Guangdong province), Meixian (Guangdong province) and Huiyang (Guangdong province) developed low -level resistance to endosulfan (3.6, 3.8, 5.1 and 7.2, respectively). Guangzhou (Guangdong province) and Huiyang populations also developed low-level resistance to bifenthrin (9.6 and 7.7, respectively). Resistance index of Chenzhou population collected from cabbage (Brassica oleracea L.) to carbosulfan was 8.1. The other populations developed moderate resistance level to endosulfan, chorpyriphos, bifenthrin, carbosulfan, pirimicarb and nitenpyram with resistant index from 10.6 to 28.0.