Cruz Breno Cayeiro, Buzzulini Carolina, Lopes Welber Daniel Zanetti, Maciel Willian Giquelin, Bichuette Murilo Abud, Felippelli Gustavo, Teixeira Weslen Fabricio Pires, Soares Vando Edésio, Gomes Lucas Vinicius Costa, Prando Luciana, Campos Gabriel Pimentel, da Costa Alvimar José
CPPAR - Animal Health Research Center - Faculdade de Ciências Agrárias e Veterinárias, UNESP, Via de acesso Prof. Paulo Donatto Castellani, s/n, CEP:14884-900 Jaboticabal, São Paulo, Brazil.
CPPAR - Animal Health Research Center - Faculdade de Ciências Agrárias e Veterinárias, UNESP, Via de acesso Prof. Paulo Donatto Castellani, s/n, CEP:14884-900 Jaboticabal, São Paulo, Brazil; Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO 74605050, Brazil.
Prev Vet Med. 2015 Nov 1;122(1-2):70-5. doi: 10.1016/j.prevetmed.2015.09.010. Epub 2015 Sep 25.
This present study aimed to evaluate the deleterious effects of some commercially available spray formulations (15% Cypermethrin+25% Chlorpyriphos+1% Citronellal and 8% Cypermethrin+60% Ethion) on the reproductive parameters of engorged Rhipicephalus (Boophilus) microplus females that detached from experimentally infested cattle. The following reproductive parameters of engorged female ticks were analyzed: female weight, egg mass weight, percentage of hatchability, percentage of reduction in oviposition, percentage of reduction in hatchability, reproductive efficiency and percent control/efficacy of formulations for reproductive parameters. Our findings showed that although the strain R. (B.) microplus used in both experiments was thought to be sensitive to the test compounds because of the acaricidal efficacy observed throughout these trials, it was not possible to observe overall deleterious effects on the reproductive parameters of this tick species with both spray formulations. However, the 8% Cypermethrin+60% Ethion showed short-term significant effects on the weight of female ticks between the 14th and 16th days post-treatment and the weight of female and the egg mass weight between the 20th and 22nd days post-treatment. New studies should be conducted to show if these results regarding the reproductive parameters of fully engorged R. (B.) microplus females, combined with the acaricidal efficacy can be sufficient to reduce the number of chemical treatments administered to cattle.
本研究旨在评估某些市售喷雾制剂（15%氯氰菊酯+25%毒死蜱+1%香茅醛和8%氯氰菊酯+60%乙硫磷）对从实验感染牛身上脱落的饱血微小牛蜱雌性生殖参数的有害影响。分析了饱血雌性蜱的以下生殖参数：雌蜱体重、卵块重量、孵化率百分比、产卵减少百分比、孵化率降低百分比、生殖效率以及制剂对生殖参数的控制/功效百分比。我们的研究结果表明，尽管在这两个实验中使用的微小牛蜱菌株由于在整个试验中观察到的杀螨效力而被认为对测试化合物敏感，但使用这两种喷雾制剂均未观察到对该蜱种生殖参数的总体有害影响。然而，8%氯氰菊酯+60%乙硫磷在处理后第14天至第16天对雌蜱体重以及处理后第20天至第22天对雌蜱体重和卵块重量显示出短期显著影响。应开展新的研究，以表明关于饱血微小牛蜱雌性生殖参数的这些结果，结合杀螨效力，是否足以减少对牛进行化学处理的次数。
