Brito L G, Barbieri F S, Rocha R B, Santos A P L, Silva R R, Ribeiro E S, Guerrero F, Foil L, Oliveira M C S
Embrapa Amazônia Oriental, Belém, Brazil.
Embrapa Rondônia, Porto Velho, Brazil.
Med Vet Entomol. 2019 Mar;33(1):121-130. doi: 10.1111/mve.12330. Epub 2018 Aug 20.
Pesticides are used worldwide to control arthropod parasites in cattle herds. The indiscriminate and/or inappropriate use of pesticides without veterinary guidance is a reality in several countries of South America. Improper pesticide use increases the chances of contamination of food and the environment with chemical pesticides and their metabolites. Reduction of these contamination events is an increasing challenge for those involved in livestock production. The horn fly, Haematobia irritans (Linnaeus) (Diptera: Muscidae), is one of the most economically important parasites affecting cattle herds around the world. As such, horn fly control efforts are often required to promote the best productive performance of herds. Pesticide susceptibility bioassays revealed that pyrethroid resistance was widespread and reached high levels in horn fly populations in the Brazilian state of Rondônia. The knockdown resistance (kdr) sodium channel gene mutation was detected in all horn fly populations studied (n = 48), and the super kdr sodium channel gene mutation was found in all homozygous resistant kdr individuals (n = 204). Organophosphate resistance was not identified in any of the fly populations evaluated.
全世界都在使用杀虫剂来控制牛群中的节肢动物寄生虫。在南美洲的几个国家，在没有兽医指导的情况下滥用和/或不当使用杀虫剂是一个现实情况。不当使用杀虫剂增加了化学杀虫剂及其代谢物污染食物和环境的可能性。减少这些污染事件对从事畜牧业生产的人来说是一个日益严峻的挑战。角蝇，嗜人血蝇（Linnaeus）（双翅目：蝇科），是影响世界各地牛群的最重要的经济寄生虫之一。因此，通常需要进行角蝇控制工作，以促进牛群的最佳生产性能。杀虫剂敏感性生物测定表明，拟除虫菊酯抗性在巴西朗多尼亚州的角蝇种群中广泛存在且达到了很高的水平。在所研究的所有角蝇种群（n = 48）中均检测到击倒抗性（kdr）钠通道基因突变，并且在所有纯合抗性kdr个体（n = 204）中均发现了超级kdr钠通道基因突变。在所评估的任何蝇类种群中均未发现有机磷抗性。
