Lima, LGFPerri, SHVPrado, A. P.2014-02-262014-05-202014-02-262014-05-202003-11-28Veterinary Parasitology. Amsterdam: Elsevier B.V., v. 117, n. 4, p. 309-314, 2003.0304-4017http://hdl.handle.net/11449/14721The population density of horn flies was evaluated in the year 1998 in the municipality of Aracatuba, 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. (C) 2003 Elsevier B.V. All rights reserved.309-314engHaematobia irritans irritanspopulation densityenvironmental factorsArtigo10.1016/j.vetpar.2003.10.002WOS:000187016800008Acesso restrito0810837598202634