【摘要】 目的了解中华按蚊对溴氰菊酯、氟氯氰菊酯、DDT和马拉硫磷抗药性,为合理使用杀虫剂提供科学依据。方法采用WHO区分剂量标准和方法,观察首只蚊虫击倒时间、击倒率和死亡率,根据校正死亡率判定抗性级别。结果襄州区、广水市、京山县中华按蚊对DDT、溴氰菊酯和氟氯氰菊酯首只蚊虫击倒时间依次为4～42 min、4～20 min和5～18 min,击倒率依次为2.06%～6.60%、4.9%～11.43%和3.23%～23.47%,校正死亡率均小于50%,均为抗性群体;对马拉硫磷首只蚊虫击倒时间10～13 min,击倒率17.76%～35.05%,校正死亡率广水市小于80%为抗性群体、襄州区和京山县在82.6%～88.78%,为初步抗性群体。结论湖北省部分地区中华按蚊对DDT仍具有很高的抗药性,对溴氰菊酯和氟氯氰菊酯也具有很强的抗药性和抗击倒力。应加强监测,现场防制宜适当加大使用剂量,确保防制效果。更多还原

【Abstract】 Objective To understanad the resistance of Anopheles sinensis to deltamethrin,cyfluthrin,DDT and malathion.Methods The knockdown time of the first Anopheles,the knockdown rate and the mortality were recorded by WHO discrimination dose method and the resistance degree was determined.Results The knockdown time of the first Anophele and the knockdown rate to DDT,deltamethrin and cyfluthrin were 4～42min,4～20min and 5～18min,and 2.06～6.60%,4.9～11.43% and 3.23～23.47%,the corrected mortality all were less than 50%,the Anopheles were resistance group in the three areas;The knockdown time of the first Anophele 、the knockdown rate to Malathion were 10～13min and 17.76～35.05%,and,the corrected mortality was less than 80% in Guangshui city,the Anopheles had were resistance group,the corrected mortality was 82.6～88.78% in Xiangzhou district and Jingshan county,the Anopheles was preliminarily a resistant group.Conclusion The resistance of Anopheles sinensis to DDT was still higher in some areas in Hubei,the resistance and anti-knockdown rate of Anopheles sinensis to cyfluthrin,deltamethrin were also high.Thus the work of monitoring be strengthened and the dose of insecticide be increased to maintain effective ruslts..更多还原