Loftin K M, Byford R L, Craig M E, Steiner R L
Department of Entomology, Plant Pathology and Weed Science, New Mexico State University, Las Cruces 88003, USA.
J Am Mosq Control Assoc. 1996 Mar;12(1):17-22.
Attraction, engorgement, mortality, and fecundity were observed on host-seeking Aedes vexans and Psorophora confinnis given the opportunity to feed on insecticide-treated steers in stable traps. Individual steers were treated with Ectrin ear tags, Ectrin spray, Terminator ear tags, Saber ear tags, or Ivomec injection or were left untreated. Aedes vexans and Ps. confinnis accounted for over 98% of 20,738 mosquitoes collected. Relative attraction ranged from 0.45 with Saber ear tag to 0.84 with Terminator ear tag. Engorgement rates of mosquitoes from insecticide-treated steers ranged from 55 to 91%. Engorgement was reduced 18-45% by Terminator ear tag, Ectrin spray, and Saber ear tag treatments. Forty-eight percent mortality of unengorged Ae. vexans and 61% mortality of unengorged Ps. confinnis was observed at collection with the Saber ear tag treatment. Percentage of mortality of engorged mosquitoes of both species was generally much lower. Ivomec injection treatment showed the greatest effect on delayed (48-h) mortality of engorged mosquitoes, with 41 and 82% mortality for Ae. vexans and Ps. confinnis, respectively. No insecticide treatment had a significant effect on fecundity.
在稳定诱捕器中，让寻找宿主的骚扰伊蚊和致倦库蚊有机会吸食经杀虫剂处理的公牛血液，观察其吸引力、饱食率、死亡率和繁殖力。对个体公牛分别用伊克丁耳标、伊克丁喷雾、终结者耳标、萨博耳标、伊维菌素注射进行处理，或不做处理。在采集的20738只蚊子中，骚扰伊蚊和致倦库蚊占比超过98%。相对吸引力范围从使用萨博耳标的0.45到使用终结者耳标的0.84。吸食经杀虫剂处理的公牛血液的蚊子饱食率在55%至91%之间。使用终结者耳标、伊克丁喷雾和萨博耳标处理可使饱食率降低18%至45%。在采集时，使用萨博耳标处理的未饱食骚扰伊蚊死亡率为48%，未饱食致倦库蚊死亡率为61%。两种饱食蚊子的死亡率百分比通常要低得多。伊维菌素注射处理对饱食蚊子的延迟（48小时）死亡率影响最大，骚扰伊蚊和致倦库蚊的死亡率分别为41%和82%。没有哪种杀虫剂处理对繁殖力有显著影响。
