Population dynamics of horn fly, Haematobia irritans irritans (L.) (Diptera: Muscidae), on Hereford cattle in Uruguay

Castro, Eleonor; Gil, Andrés Delgado; Piaggio, J.; Chifflet, Lucila; Farias, Nara Amélia da Rosa; Solari, M. A.; Moon, Roger D.

doi:10.1016/j.vetpar.2007.10.020

Cited by 12 publications

(10 citation statements)

References 37 publications

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“…Previous research showed that the mean number of flies on susceptible animals can be more than twice the number on resistant animals [ 23 ]. The mean number of flies/animal did not exceed 80; the value is similar to the values obtained in other studies by Bianchin and Alves [ 24 ] and Bianchin et al [ 25 ] but is lower than the values observed in other studies conducted in Brazil [ 18 ] and Argentina [ 26 ].…”

Section: Discussionsupporting

confidence: 89%

Seasonal Variation and Frequency Distribution of Ectoparasites in Crossbreed Cattle in Southeastern Brazil

Costa

Guimarães

Lima

et al. 2014

Journal of Veterinary Medicine

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The aims of this study were to evaluate the seasonal variation and frequency distribution of Rhipicephalus (Boophilus) microplus, Haematobia irritans, and Dermatobia hominis on crossbred heifers under field conditions in the northeast of Minas Gerais state, southeastern Brazil. From November 2007 to September 2009 (23 months), 40 heifers aged 16.6 ± 2.4 months were divided into groups A (1/4 Holstein × 3/4 Gir) and B (1/2 Holstein × 1/2 Gir) and had the monthly infestation estimated along with the climatic conditions. The mean maximum and minimum temperatures were 28.5 and 19°C, respectively. The ectoparasites were present on animals in all months of the year. The levels of ticks on the animals were low (3.0 ± 0.2 ticks/animal), with the highest density in midwinter. The temperature was the climatic factor that most influenced the tick levels. The population of H. irritans (13.9 ± 0.3 flies/animal) and D. hominis (1.5 ± 0.2 larvae/animal) on heifers was more influenced by rainfall and exhibited two population peaks during the year. 1/2 Holstein heifers harbored significantly more H. irritans and D. hominis than 1/4 Holstein heifers. The results are discussed considering the most appropriate periods to apply ectoparasiticides and the genetic make-up of the animals.

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Section: Discussionsupporting

confidence: 89%

Seasonal Variation and Frequency Distribution of Ectoparasites in Crossbreed Cattle in Southeastern Brazil

Costa

Guimarães

Lima

et al. 2014

Journal of Veterinary Medicine

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“…The higher infestations observed in November/December and February/March followed the general trend of population peaks in mid to late spring and late summer to beginning-autumn as observed in studies conducted in Canada 9 , Argentina 10 , Brazil 6 , U.S.A. 11 and Uruguay 12 . Even during those population peaks, the median of infestations was above the economic threshold only for specific days, thus confirming previous observations 6,12 .…”

Section: Discussionsupporting

confidence: 76%

Influence of selective treatment onHaematobia irritansinfestation of untreated cattle

Miraballes

Stryhn

Barros

et al. 2019

Preprint

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6To reduce the use of insecticide treatments against Haematobia irritans we evaluated the 7 impact of treating 15% of the bovines, with the greatest number of flies including bulls, 8 with 40% diazinon ear tags, on the infestation of untreated cows. Horn fly susceptibility 9 to diazinon was measured before and after treatment, and peaks of infestation were 10 recorded. Three groups of Bradford bovines were evaluated: Group 1 (control untreated), 11 Group 2 (15% treated) and Group 3 (control 100% treated). Weekly counts of horn flies 12 were performed on the same animals for 78 days. Two peaks of infestation were recorded, 13 and a higher number of horn flies occurred in the untreated control group than in the 14 untreated cows of the selectively treated group throughout the entire period of the study, 15 except for a single week. The horn fly field population was significantly more susceptible 16 to diazinon than the reference susceptible strain both before and after insecticide 17 treatment. In conclusion, treatment of 15% of the most infested animals from a herd, with 18 40% diazinon ear tags, quickly reduced horn fly infestations of the entire herd and may 19 be a practical approach for horn fly control, reducing costs and chemical use. 20

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“…De modo geral, a temperatura determina a presença ou ausência da mosca, enquanto chuvas e umidade determinam sua abundância (Gordon et al 1984). O rigor do inverno torna evidente a influência da temperatura em regiões temperadas (Guglielmone et al 1997, Cruz-Vázquez et al 2000, Castro et al 2008, enquanto em regiões tropicais as infestações tendem a ocorrer ao longo de todo o ano e as flutuações de abundância estão frequentemente associadas ao padrão de chuvas (Collares 1990, Oliveira & Freitas 1997, Barros 2001, Lima et al 2003, Bianchin et al 2006.…”

Section: Discussionunclassified

Sazonalidade da mosca-dos-chifres, Haematobia irritans, no semiárido brasileiro

et al. 2018

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RESUMO: A mosca-dos-chifres (Haematobia irritans) é uma dos principais pragas que afetam a pecuária no Brasil. A despeito das carências regionais, inexistem estudos que avaliem sua importância e subsidiem seu controle no nordeste brasileiro. O presente estudo objetivou conhecer a dinâmica populacional e determinar os níveis de infestação da H. irritans no semiárido paraibano, visando subsidiar programas de controle. O estudo foi conduzido no Núcleo de Pesquisa para o Trópico Semiárido, Universidade Federal de Campina Grande, município de Patos, Paraíba. Durante 42 meses, de abril 2011 a setembro 2014, contagens de moscas-dos-chifres foram realizadas a cada 14 dias em um rebanho Sindi (26 vacas e um touro). Paralelamente, foram registrados diariamente os principais parâmetros climáticos. Infestações da mosca-dos-chifres ocorreram durante todo o período de estudo, com infestações individuais superiores a 100 moscas em todas as contagens, infestações médias mensais de até 183 moscas/vaca e infestações individuais máximas de 500 moscas nas vacas e 1.800 moscas no touro. Influenciados pela influência microclimática de grandes açudes, a mosca-dos-chifres apresentou comportamento bimodal, com picos populacionais anuais em outubro/novembro e março. Não foi encontrada correlação significativa entre fatores climáticos e resultados das contagens. De modo a evitar os picos de infestação e reduzir perdas econômicas subsequentes, medidas de controle são recomendadas.

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Population dynamics of horn fly, Haematobia irritans irritans (L.) (Diptera: Muscidae), on Hereford cattle in Uruguay

Cited by 12 publications

References 37 publications

Seasonal Variation and Frequency Distribution of Ectoparasites in Crossbreed Cattle in Southeastern Brazil

Seasonal Variation and Frequency Distribution of Ectoparasites in Crossbreed Cattle in Southeastern Brazil

Influence of selective treatment onHaematobia irritansinfestation of untreated cattle

Sazonalidade da mosca-dos-chifres, Haematobia irritans, no semiárido brasileiro

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