title: Effects of different spray formulations on the reproductive parameters of engorged Rhipicephalus (Boophilus) microplus females detached from experimentally infested cattle.
abstract: 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.
authors.affiliation: 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.
authors.forename: Breno Cayeiro
authors.initials: BC
authors.lastname: Cruz
authors.affiliation: 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.
authors.forename: Carolina
authors.initials: C
authors.lastname: Buzzulini
authors.affiliation: 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. Electronic address: wdzlopes@hotmail.com.
authors.forename: Welber Daniel Zanetti
authors.initials: WD
authors.lastname: Lopes
authors.affiliation: 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.
authors.forename: Willian Giquelin
authors.initials: WG
authors.lastname: Maciel
authors.affiliation: 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.
authors.forename: Murilo Abud
authors.initials: MA
authors.lastname: Bichuette
authors.affiliation: 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.
authors.forename: Gustavo
authors.initials: G
authors.lastname: Felippelli
authors.affiliation: 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.
authors.forename: Weslen Fabricio Pires
authors.initials: WF
authors.lastname: Teixeira
authors.affiliation: 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; Universidade Camilo Castelo Branco (Unicastelo), Av. Hilário da Silva Passo 950, Descalvado, SP 13690-970, Brazil.
authors.forename: Vando Edésio
authors.initials: VE
authors.lastname: Soares
authors.affiliation: 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.
authors.forename: Lucas Vinicius Costa
authors.initials: LV
authors.lastname: Gomes
authors.affiliation: 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.
authors.forename: Luciana
authors.initials: L
authors.lastname: Prando
authors.affiliation: 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.
authors.forename: Gabriel Pimentel
authors.initials: GP
authors.lastname: Campos
authors.affiliation: 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.
authors.forename: Alvimar José
authors.initials: AJ
authors.lastname: da Costa
mesh_terms: D056810:Acaricides / Q000494:pharmacology*; D000080462:Acyclic Monoterpenes; D000447:Aldehydes; D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000469:parasitology / Q000517:prevention & control*; D004390:Chlorpyrifos; D005260:Female; D039821:Monoterpenes; D009946:Organothiophosphorus Compounds; D011722:Pyrethrins; D011897:Random Allocation; D012098:Reproduction / Q000187:drug effects; D048494:Rhipicephalus / Q000187:drug effects*; D013984:Tick Infestations / Q000469:parasitology / Q000517:prevention & control / Q000662:veterinary*
chemical_list: D056810:Acaricides; D000080462:Acyclic Monoterpenes; D000447:Aldehydes; D039821:Monoterpenes; D009946:Organothiophosphorus Compounds; D011722:Pyrethrins; C017160:cypermethrin; C100038:ethion; D004390:Chlorpyrifos; C108217:citronellal
keywords: Engorged females; Reproductive parameters; Rhipicephalus (Boophilus) microplus; Spray formulations