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Larvicidal potential of piperovatine in the control of cattle tick

机译：牛蜱控制中哌啶的幼虫潜力

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摘要

Rhipicephalus (Boophilus) microplus is one of the most important ectoparasites in cattle breeding worldwide, causing direct and indirect losses to animals and producers. Chemical acaricides are utilized in the control of cattle tick and the increase in the development of resistance by ectoparasites makes new alternative necessary. Therefore, research studies have been carried out using bioactive molecules that are quickly degraded and that reduce poisoning to appliers and non-target organisms, environmental contamination and development of resistance. Thus, this study aimed to isolate piperovatine from the roots of Piper corcovadensis, a native species to Brazil, and to evaluate the larvicidal activity against Rhipicephalus (Boophilus) microplus by larval packet test and in ex situ in an open environment. Piperovatine was isolated by classical column chromatography, and identified by H-1 and C-13 NMR. The lethal concentration (LC) of piperovatine that killed 50% (LC50) and 99% (LC99) of the larvae was determined by Probit analysis. The results indicated LC50 5.17 and LC99 25.41 mu g/mL. LC99 was tested in ex situ in an open environment, and an efficiency of 96.63% was found, indicating that piperovatine kept the larvicidal action determined in in vitro test and in open environment. Therefore, this study shows new perspectives to develop products that can be applied in natural conditions to control this ectoparasite.
机译：Rapicephalus（Boophilus）Microplus是全球牛养殖中最重要的异位遗传癖者之一，对动物和生产者造成直接和间接的损失。化学杀螨剂用于控制牛蜱和抗寄生虫的抗性的增加产生新的替代。因此，使用迅速降解的生物活性分子进行研究研究，并将中毒降低到适用剂和非靶毒性，环境污染和抗性的发展。因此，该研究旨在将哌啶与巴西的天然物种的根源分离出来，并通过幼虫分组试验和在开放环境中进行幼虫（Boophilus）微孔的幼虫活性。通过典型柱色谱分离哌啶，并通过H-1和C-13 NMR鉴定。通过探测分析测定杀死50％（LC50）和99％（LC99）的哌啶的致致死浓度（LC）。结果表明LC50 5.17和LC9925.41μg/ ml。 LC99在开放环境中在Ex原位中进行测试，发现效率为96.63％，表明哌啶保持在体外测试中测定的幼稚癌和开放环境。因此，本研究表明，开发可用于控制这种异位酸的产品的产品的新观点。

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