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  • Title: Variation in population density of horn flies (Haematobia irritans irritans) (L.) (Diptera: Muscidae) in Nellore cattle (Bos indicus).
    Author: Lima LG, Perri SH, Prado AP.
    Journal: Vet Parasitol; 2003 Nov 28; 117(4):309-14. PubMed ID: 14637033.
    Abstract:
    The population density of horn flies was evaluated in the year 1998 in the municipality of Araçatuba, São Paulo Brazil, in relation to temperature and rainfall conditions. Two lots of 30 Nellore steers (Bos indicus) were used which had no insecticidal treatment and were naturally infested with horn flies. The infestations were assessed by two counting methods, i.e., the traditional estimate method and the filming method. The highest fly frequencies were recorded in spring, summer, autumn and the lowest frequencies were recorded in winter. The increase in fly number was positively correlated (P<0.05) with rainfall.
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