摘要
探求3种不同杀虫剂对2种品系白蚊伊蚊的致死效果,并对其抗性进行对比研究。在(26.3±1.0)℃,相对湿度(65.0±10.0)%的条件下,采用浸渍法测定了高效氯氰菊酯、敌敌畏、残杀威分别对敏感、野生品系白纹伊蚊24 h内的半数致死浓度LC_(50)及其抗性倍数。高效氯氰菊酯对敏感品系和野外品系的白纹伊蚊24 h内的半数致死浓度分别为0.0073 mg/L和0.0189 mg/L;敌敌畏对敏感品系和野生品系的白蚊伊蚊24 h内半数致死浓度LC_(50)分别为0.2062 mg/L和0.5115 mg/L,残杀威对野外和敏感品系和野生品系的白蚊伊蚊LC_(50)分别为3.5987 mg/L和1.6796 mg/L。在抗性测定试验中,残杀威抗性倍数为2.1,相对另外2种药物,其抗性倍数最低,高效氯氰菊酯和敌敌畏分别为2.6和2.5,综合考虑致死效果及积累因素,3种药物都为低抗性药物,高效氯氰菊酯的致死效果最好,残杀危的抗性最小。
The lethal effect of three different pesticides on two Aedes albopictus strains was explored in this study. The resistance was compared and studied. At the condition of （26.3 ± 1.0）℃and relative humidity of （65.0±10.0）%, the medium lethal concentration （LC50） and resistance ratios of beta-cypermethrin, dichlorvos, propoxur on susceptible-strain and wild-strain A. albopictus in 24 hours were measured by dipping method. The results showed that the LCso of beta cypermethrin in 24 hours on susceptible-strain and wild-strain A. albopictus was 0.0073 mg/L and 0.0189 rag/L, respectively. The LC50 of dichlorvos was 0.2062 mg/L and 0.5115 rag/L, respectively. The LC50 of propoxur was 3.5987 mg/L and 1.6796 mg/L, respectively. In resistance detection test, propoxur showed a resistance ratio of 2.1, the lowest compared with the other two pesticides, with beta cypermethrin and dichlorvos showing 2.6 and 2.5 of resistance ratio, respectively. Based on lethal and accumulation effects of pesticides, it is concluded that the three pesticides all show low drug resistance and beta cypermethrin presents the best lethal effect while propoxur the lowest drug resistance.
出处
《中国农学通报》
2017年第12期115-118,共4页
Chinese Agricultural Science Bulletin
基金
省级大学生创新训练项目"常见入侵种提取物抑蚊效果研究"(201513177034)
