Stubbs V K, Wilshire C, Webber L G
Aust Vet J. 1982 Nov;59(5):152-5. doi: 10.1111/j.1751-0813.1982.tb02762.x.
Cyhalothrin, a novel synthetic pyrethroid, was evaluated for control of the major resistant strains of the cattle tick (Boophilus microplus) and for control of the buffalo fly (Haematobia irritans exigua) on cattle. In regulated treatment trials with 0.007% cyhalothrin, greater than 99% control of the Biarra, Mackay, Mt Alford, DDT resistant and Ulam cattle tick strains was obtained. Protective-period trials were conducted in which animals which had been sprayed with 0.007% cyhalothrin then received a continuing heavy challenge of the organophosphate-resistant Biarra tick strain. The first semi-engorged adult ticks appeared no earlier than 27 days after treatment, which corresponds to a minimum protective period against reinfestation of 7 days. Protective-periods ranging from 7 to 15 days were obtained in trials that were conducted. Field trials on cattle confirmed that dipping in 0.007% cyhalothrin provided a high level of tick control and a minimum of 7 days protective period against reinfestation. Thus a 28 day treatment interval was employed. It was possible to further extend dipping intervals to as long as 7 weeks once tick populations were reduced on the pasture. Furthermore at least 28 days protection from reinfestation with buffalo fly was also provided. In backspraying trials on cattle, 200 mg cyhalothrin applied to each animal as an 0.2% aqueous emulsion gave greater than 28 days protection against reinfestation with buffalo fly.
氯氟氰菊酯是一种新型合成拟除虫菊酯，对牛蜱（微小牛蜱）的主要抗性品系以及牛身上的水牛蝇（嗜畜血蝇）的防治效果进行了评估。在使用0.007%氯氟氰菊酯的规范处理试验中，对比亚拉、麦凯、奥尔福德山、滴滴涕抗性和乌拉姆牛蜱品系的防治率超过99%。进行了保护期试验，用0.007%氯氟氰菊酯喷洒过的动物随后持续受到对有机磷具有抗性的比亚拉蜱品系的严重侵扰。首次出现半饱血成虫的时间不早于处理后27天，这相当于防止再次侵染的最短保护期为7天。在进行的试验中获得了7至15天的保护期。在牛身上进行的田间试验证实，用0.007%氯氟氰菊酯浸浴可实现高水平的蜱虫防治，并提供至少7天的防止再次侵染的保护期。因此采用了28天的处理间隔。一旦牧场蜱虫数量减少，浸浴间隔可进一步延长至长达7周。此外，还提供了至少28天防止水牛蝇再次侵染的保护。在牛的反向喷雾试验中，以0.2%水乳剂形式给每头动物施用200毫克氯氟氰菊酯，可提供超过28天防止水牛蝇再次侵染的保护。
