Cilek J E, Steelman C D, Knapp F W
Department of Entomology, University of Kentucky, Lexington 40546.
J Econ Entomol. 1991 Jun;84(3):756-62. doi: 10.1093/jee/84.3.756.
The effect of previous insecticide use patterns for horn fly control on the susceptibility spectrum of horn fly (Haematobia irritans [L.]) populations from Kentucky and Arkansas is described. Populations of horn flies from both states were tested with three pyrethroids (cyhalothrin, cypermethrin, and permethrin), three organophosphates (diazinon, pirimiphos methyl, and tetrachlorvinphos), and a chlorinated hydrocarbon (methoxychlor). Dose-mortality data indicated insecticide resistance in Arkansas and Kentucky. Two permethrin-resistant horn fly populations in Kentucky that did not have a history of exposure to methoxychlor were cross-resistant to this chlorinated hydrocarbon. Horn fly populations from both states with a history of at least three consecutive years of exposure to various pyrethroid ear tags were subsequently exposed to cattle tagged with cyhalothrin-impregnated ear tags for 15-16 wk. Such exposure resulted in a decrease in susceptibility to this pyrethroid (ranging from approximately 30 to greater than 100-fold) when compared with levels before treatment. Horn fly populations from Arkansas resistant to cyhalothrin (as a result of exposure to cyhalothrin ear tags) were cross-resistant to pirimiphos methyl. Seasonal exposure of an Arkansas and Kentucky horn fly population to cattle with ear tags impregnated with pirimiphos methyl resulted in a significant decrease in susceptibility to this organophosphate.
描述了之前用于防治角蝇的杀虫剂使用模式对来自肯塔基州和阿肯色州的角蝇（血蝇属[L.]）种群易感性谱的影响。用三种拟除虫菊酯（氯氟氰菊酯、氯氰菊酯和氯菊酯）、三种有机磷（二嗪农、甲基嘧啶磷和杀虫畏）以及一种氯代烃（甲氧滴滴涕）对来自这两个州的角蝇种群进行了测试。剂量-死亡率数据表明阿肯色州和肯塔基州存在抗药性。肯塔基州两个没有甲氧滴滴涕接触史的氯菊酯抗性角蝇种群对这种氯代烃存在交叉抗性。来自这两个州且有连续至少三年接触各种拟除虫菊酯耳标的角蝇种群，随后接触了用氯氟氰菊酯浸渍耳标标记的牛15 - 16周。与处理前的水平相比，这种接触导致对角蝇对这种拟除虫菊酯的易感性降低（范围从约30倍到大于100倍）。来自阿肯色州的对氯氟氰菊酯有抗性（由于接触氯氟氰菊酯耳标）的角蝇种群对甲基嘧啶磷存在交叉抗性。阿肯色州和肯塔基州的角蝇种群季节性接触用甲基嘧啶磷浸渍耳标标记的牛，导致对角蝇对这种有机磷的易感性显著降低。
