Caracterização do controle de Haematobia irritans e Rhipicephalus (Boophilus) microplus no Triângulo Mineiro e Alto Paranaíba, Minas Gerais

Abstract

Pesq. Vet. Bras. 32(12):1246-1252, dezembro 2012 1246 RESUMO.-O controle eϐicaz de Haematobia irritans (mosca--dos-chifres) e Rhipicephalus (Boophilus) microplus (carrapato-do-boi) é um fator crucial à maior rentabilidade da pecuária brasileira, porém ainda constitui-se um desaϐio. Um maior conhecimento das práticas adotadas no combate destes parasitos faz-se necessário para que se possam estruturar estratégias de controle mais próximas da realidade do produtor rural e mais fáceis de serem executadas. The effective control of Haematobia irritans (horn ϐly) and Rhipicephalus (Boophilus) microplus (cattle tick) is crucial for increasing the productivity of livestock industry in Brazil, but still remains a challenge. A greater knowledge about parasite control in the ϐield is necessary to establish control strategies closer to farmer's reality and easier to be performed. This study characterized the practices adopted for controlling such ectoparasites on 23 cattle ranches from the Triângulo Mineiro and Alto Paranaíba region in the state of Minas Gerais, through interviews. Most interviewees recognized the importance of these parasites to livestock, however, many problems related to parasite control were observed. Control of horn ϐlies and cattle tick was a routine in 17.4% and 95.7% of the ranches, respectively, triggered by high infestations on animals. More than six insecticide/acaricide treatments were applied yearly in all cattle ranches controlling horn ϐlies and in 76.5% of the ranches controlling the cattle tick. Pesticide products were applied mostly by manual backpack sprayers (63.6%) without restraining the animals in 45.5% of ranches. Product dilution following manufacturer's recommendations was performed by 45.5% of interviewees, but 63.6% of them used lower doses per animal than technically recommended. Associations of organophosphates and pyrethroids were the main products used to control both parasites. Although pesticide use was a routine practice, the use of personal protective equipment (PPE) was not common among surveyed people. Most interviewees were able to recognize epidemiological characteristics of the parasites; however, parasite control measures adopted at most cattle ranches tend to jeopardize the efϐicacy of products, susceptibility of parasites and sustainability of control programs. Caracterização do controle deINDEX TERMS: Horn ϐly, Haematobia irritans, cattle tick, Rhipicephalus (Boophilus) microplus interview, parasite control.

Management and control of parasites on dairy farms in northwestern region of São Paulo state

“…This is important information, since the chemical products for controlling these two parasites are similar. Farias et al (2008) and Santos et al (2009) found a similar situation in Rio Grande do Sul and Domingues et al (2012) in Minas Gerais. Care is required with regard to cross-selection for the two parasites.…”

“…The lack of any habit of using individual protection devices and the low degree of concern about poisoning from acaricide applications were also observed by Rocha et al (2006), Bertolucci (2010) and Domingues et al (2012) on farms in Minas Gerais and by Bello (2010) on farms in Rio de Janeiro. Cattle need to be restrained in order to do a good acaricide application, especially in relation to the ventral area of the animals, where most of the ticks are attached .…”

“…In in vitro assays, Spagnol et al (2010), Pereira (2006) and Camillo et al (2009) determined the best efficiency for mixed chemical groups in relation to ticks tested in municipalities of the States of Bahia, São Paulo and Rio Grande do Sul, respectively. Domingues et al (2012) found that mixtures of pyrethroids and organophosphates were more used for tick and hornfly control by producers in the Triângulo Mineiro and Alto Paranaíba regions of Minas Gerais.…”

Control of Haematobia irritans in the Minas Gerais Semiarid

“…A utilização de produtos organofosforados parece ser indício de resistência aos piretroides e da necessidade de mudança do produto usado para controle [14]. Organofosforados apresentaram 100% de eficácia no controle da mosca, quando utilizados brincos impregnados com 40% de diazinon com melhora no ganho de peso, pois animais livres de estresse e espoliação parasitária dispendem maior tempo na alimentação [41].…”

Seasonal Variation and Frequency Distribution of Ectoparasites in Crossbreed Cattle in Southeastern Brazil

“…Cattle kept under field conditions tend to be parasitized simultaneously by different species of ectoparasites. Proposals to combat more than one parasite at once are more economical and more operationally feasible and may have greater acceptance by farmers [ 3 ]. Most control programs are based primarily on the application of ectoparasiticides.…”