Dynamics of Haematobia irritans irritans (Diptera: Muscidae) infestation on Nelore cattle in the Pantanal, Brazil

AUTOR(ES)

Barros, Antonio Thadeu M

FONTE

Memórias do Instituto Oswaldo Cruz

DATA DE PUBLICAÇÃO

2001-05

RESUMO

From June 1993 to May 1995, horn fly counts were conducted twice a month on untreated Nelore cattle raised extensively in the Pantanal. Horn fly population showed a bimodal fluctuation and peaks were observed every year after the beginning (November/December) and at the end (May/June) of the rainy season, which coincided with mid-late spring and mid-late fall, respectively. Horn flies were present on cattle throughout the year in at least 64% of the animals. Mean horn fly numbers on animals did not exceed 85 flies/cow during peaks and were under 35 flies/cow in most of the remaining periods. The highest infestations (population peaks) were short and dropped suddenly within two weeks. Less than 15% of the animals in both herds could be considered as "fly-susceptible" - showing consistently higher infestations, or "fly-resistant" - showing consistently lower infestations.

Documentos Relacionados

• Genetic analysis of the infestation of females of the Caracu cattle breed by Horn Fly (Haematobia irritans irritans) (L.) (Diptera, Muscidae)
• Estresse por diflubenzurom no desenvolvimento de Haematobia irritans (L.) (Diptera: Muscidae)
• Effect of diflubenzuron on immature stages of Haematobia irritans (L.) (Diptera: Muscidae) in Uberlândia, State of Minas Gerais, Brazil
• Susceptibility to diazinon in populations of the horn fly, Haematobia irritans (Diptera: Muscidae), in Central Brazil
• Avaliação de dois metodos de contagem e densidade populacional da mosca-dos-chifres (Haematobia irritans irritans) (Diptera: Muscidae) em bovinos da raça nelore (Bos indicus) (Artiodactyla: Bovidae)