2009
DOI: 10.1590/s0100-736x2009000100010
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Abstract: In the southern region of Rio Grande do Sul, cattle become infested with Rhipicephalus (B.) microplus mainly between October and April due to the climatic conditions. In addition to knowing its life cycle, knowledge of parasite's epidemiology is essential to establish management strategies. Epidemiological studies on resistance to acaricides in Rio Grande do Sul as well as in the rest of Brazil are scarce. Moreover, the large geographical area and the structural deficiency with respect to the use and access to… Show more

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Cited by 14 publications
(14 citation statements)
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“…In other words, the owners with lower schooling level tended to apply spraying at shorter intervals, thereby speeding up the selection for resistance to acaricides. Santos et al (2009) demonstrated that these two factors are considered to present a risk of selection for tick resistance.…”
Section: Characteristicmentioning
confidence: 99%
See 1 more Smart Citation
“…In other words, the owners with lower schooling level tended to apply spraying at shorter intervals, thereby speeding up the selection for resistance to acaricides. Santos et al (2009) demonstrated that these two factors are considered to present a risk of selection for tick resistance.…”
Section: Characteristicmentioning
confidence: 99%
“…Moreover, they use subjective parameters for applying and using acaricides (LEITE; ROCHA, 1999). These actions favor establishment of resistance to chemical products (SANTOS JUNIOR et al, 2000;SANTOS et al, 2009) and bring risks to human and animal health.…”
Section: Introductionmentioning
confidence: 99%
“…O uso indiscriminado de tais produtos, juntamente com práticas inadequadas para o combate dos parasitos e a falta de especiϐicidade dos ectoparasiticidas, tem colaborado para a rápida seleção de populações resistentes (Santos Junior et al 2000, Saueressig & Barros 2003, Rodrigues et al 2004, Barros et al 2007, Santos et al 2009, Mendes et al 2011.…”
Section: Introductionunclassified
“…Rocha et al (2006) found that a mean of 12 treatments were applied per year in Passos, Minas Gerais, and Vivas et al (2006a) found the same frequency for 41.8% of the producers in Mexico, which can be considered excessive. Santos et al (2009) found that using more than four chemical treatments per year increased the chances of selecting difficult-to-control ticks more than fourfold. Likewise, Vivas et al (2006b) found that six or more treatments per year increased the chances of selecting resistance among ticks.…”
Section: Resultsmentioning
confidence: 99%
“…Tick control is done without taking into consideration technical criteria and the characteristics of the biological cycle, and there is a great distance between the technical knowledge available and the ways in which it is used (AMARAL et al, 2011a,b;ROCHA et al, 2006;CAMPOS JÚNIOR;OLIVEIRA, 2005). Among the most damaging consequences of this incorrect use of control products are the rapid development of resistance to acaricides (SANTOS et al, 2009) and the buildup of chemical residues in animal tissues and within the environment.…”
Section: Introductionmentioning
confidence: 99%