强化灭蚤地区印鼠客蚤对杀虫剂的抗药性研究

目的观察强化灭蚤后，印鼠客蚤对灭蚤类杀虫剂的抗药性变化。方法药膜法。结果强化灭蚤地区印鼠客蚤对氯菊酯、溴氰菊酯、马拉硫磷、敌敌畏、残杀威、奋斗呐（5％顺式氯氰菊酯）的LC50。分别为20．20、3．75、0．17、16．50、117．00和8．65μg·ai／cm^2，对照区饶平县的LC50依次为9．71、2．26、0．10、3．45、7、17和2．94μg·ai／cm^2，强化灭蚤地区与对照区LC5。的比值分别为2．08、1．66、1．70、4．78、16．32和2．94。结论大量而持续使用灭蚤类杀虫剂可产生抗药性的问题，因此灭蚤时要了解以往的用药情况，加强对灭蚤药物的抗药性监测，科学、合理用药。

The insecticide resistance of Xenopsylla cheopis in the constant flea-killing areas of Guangdong province

Objective To study the insecticide resistance development of in Xenopsylla cheopis after insecticide using for several constantly years. Methods Bioassay of flea contact insecticide effective testing membrane was used to carry out the surveillance. Field population in the insecticide applying areas for plague vectors prevention and control fleas was collected and tested, the flea population from non-insecticide using areas as control. Results Each LCs0 of X. cheopis to malathion, propoxur, dichlorovos, permethrin, deltamethrin and FENDONA in the constant flea-killing areas was 20.20, 3.75, 0.17, 16.50, 117.00 and 8.65 μg·ai/cm^2 which was 2.08, 1.66, 1.70, 4.78, 16.32 and 2.94 times higher than that of the uninsecticide applying contrast areas. Conclusion Applying insecticide constantly in plague vector fleas control may lead to flea insecticide resistance. It＇s better to know the insecticide susceptibility background when we develop a strategy for plague flea vectors prevention and control.