02355naa a2200277 a 450000100080000000500110000800800410001902200140006002400370007410000170011124501650012826000090029350002530030252011680055565300170172365300130174065300240175365300310177770000190180870000200182770000190184770000200186670000180188670000190190477301540192310610412020-04-29       2020    bl uuuu     u00u1 u    #d  a2405-93907 a10.1016/j.vprsr.2020.1004112DOI1 aMELO, L.R.B.  aDevelopment and number of generations of Haematobia irritans (DipterabMuscidae) in bovine fecal masses in the semiarid region of Brazil.h[electronic resource]  c2020  aArticle history: Received 24 January 2020; Revised 8 April 2020; Available online 13 April 2020. Corresponding author: Vilela, V.L.R.; Avenida Presidente Tancredo Neves, s/n, Jardim Sorrilândia, Sousa, PB, Brazil; email:vinicius.vilela@ifpb.edu.br  aABSTRACT. The horn fly (Haematobia irritans) is particularly unique among the parasites that primarily affect Brazilian cattle farming. Appropriate control strategies fundamentally depend on epidemiological knowledge, which is particularly scarce in Northeastern Brazil. This study aimed to elucidate the ecology of the immature horn fly in the semiarid region of Brazil. Bovine fecal masses were collected and covered with emergence traps to collect the horn fly for sexing and counting. Weather records of the region were concurrently acquired. A total of 11,390H. irritans were collected from 601 fecal masses, with a sex ratio of 0.9:1 (male: female). Horn fly emergence was observed in 78% (15%?100%) of the fecal masses, varying from 1 to 185 (mean = 23.3) flies/fecal mass, predominantly at the beginning of the rainy season. The minimum period for egg-to-adult development of H. irritans varied from 7 to 11 days, indicating the occurrence of 30 generations per year in the region. Rapid development of the immature horn fly in the semiarid region, throughout the year may results in a high number of generations and infestations in cattle herds.  © 2020  aECTOPARASITE  aHORN FLY  aNon-parasitic phase  aPLATAFORMA DE SALUD ANIMAL1 aMEDEIROS, M.A.1 aBESERRA, L.A.F.1 aBARROS, A.T.M.1 aRIET-CORREA, F.1 aAZEVEDO, S.S.1 aVILELA, V.L.R.  tVeterinary Parasitology: Regional Studies and Reports, April 2020, Volume 20, Article number 100411. Doi: https://doi.org/10.1016/j.vprsr.2020.100411