Infestation by Rhipicephalus (Boophilus) microplus in heifers from different genetics groups

Authors

  • Adilson Marini Faculdade de Ciências Agrárias de Andradina, Andradina, SP
  • Ricardo Veludo Gomes Soutello Faculdade de Ciências Agrárias de Andradina, Andradina, SP
  • Ricardo Lopes dias da Costa Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Centro de Pesquisa e Desenvolvimento de Zootecnia Diversificada, Nova Odessa, SP
  • José Henrique Neves Faculdade de Ciências Agrárias de Andradina, Andradina, SP
  • Alex Costa Vacari Faculdade de Ciências Agrárias de Andradina, Andradina, SP
  • Thiago Nunes Barreto Faculdade de Ciências Agrárias de Andradina, Andradina, SP
  • Sidney Monte Junior Faculdade de Ciências Agrárias de Andradina, Andradina, SP
  • João José Assumpção de Abreu Demarchi Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Centro de Pesquisa e Desenvolvimento de Nutrição Animal e Pastagens, Nova Odessa, SP

Keywords:

bovine, tick, resistance

Abstract

An assessment of the infestation of ticks Rhipicephalus (Boophilus) microplus in 59 heifers of three genetic groups was run: Nellore, Guzerá and ½ Angus x ½ Nellore, belonging to the roster APTA Regional Andradina / SP. Every 28 days held the count of ticks, where the left side of the animal, with evaluation of only engorged females with more than 4.5 mm in the period from June 2007 to May 2008. The genetic group (P <0.01) and season (P<0.05) affected the count of ticks. Heifers ½ Angus x ½ Nellore had higher counts of ticks, while the Nellore and Guzera observed no differences between them (P> 0.05). The count of ticks was higher in the rainy season (4.32 ± 5.20) in comparison with the dry season (3.74 ± 5.54). Despite the higher counts of ticks during the experimental period, in heifers ½ Angus x ½ Nellore, this genetic group obtained the highest average daily weight gain (0.57 kg/day). Heifers and bulls Nellore and Guzerá were not statistically different in relation to daily weight gain, with averages of 0.37 and 0.40kg/day, respectively. ½ Angus heifers genetic group cattle have a higher infestation by ticks.

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Published

2010-01-13

Issue

Section

ANIMAL REPRODUCTION

How to Cite

Infestation by Rhipicephalus (Boophilus) microplus in heifers from different genetics groups. (2010). Bulletin of Animal Husbandry, 67(1), 65-71. http://bia.iz.sp.gov.br/index.php/bia/article/view/1092

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