Harvey T L, Brethour J R
Kansas State University, Experiment Station, Hays 67601.
Vet Parasitol. 1988 Jul;29(1):65-71. doi: 10.1016/0304-4017(88)90008-8.
A method is needed to control pyrethroid-resistant horn flies (Haematobia irritans) which would involve the intermittent application of insecticides to cattle without their confinement for treatment. Our objective was to test a CO2 gas-operated pistol, designed to shoot marking pellets, to determine the number of pellet applications required to obtain season-long control. Also, since horn fly resistance to pyrethroid insecticides is widespread, we tested ten other insecticides as concentrates in pellets. Six pellet pistol applications of 38% permethrin provided 84% control of horn flies for 15 weeks. Single pellet applications of ten non-pyrethroid insecticides indicated that none of these insecticides, at the concentrations tested, were as effective as permethrin for control of pyrethroid-resistant horn flies. Our field evaluation of the pellet-pistol method indicates that it has sufficient merit to justify further testing for horn fly control.
需要一种控制对拟除虫菊酯产生抗性的角蝇（血蝇属）的方法，该方法需要在不限制牛只的情况下，间歇性地对牛使用杀虫剂。我们的目标是测试一种设计用于发射标记弹丸的二氧化碳气体驱动手枪，以确定获得整个季节控制所需的弹丸施用次数。此外，由于角蝇对拟除虫菊酯类杀虫剂的抗性普遍存在，我们测试了其他十种杀虫剂作为弹丸中的浓缩剂。38%氯菊酯进行六次弹丸手枪施用，在15周内对角蝇的控制率达到84%。十种非拟除虫菊酯类杀虫剂单次弹丸施用表明，在所测试的浓度下，这些杀虫剂中没有一种在控制对拟除虫菊酯产生抗性的角蝇方面与氯菊酯一样有效。我们对弹丸手枪方法的田间评估表明，它具有足够的优点，值得进一步测试用于控制角蝇。
