Genetic analysis of the infestation of females of the Caracu cattle breed by Horn Fly (Haematobia irritans irritans) (L.) (Diptera, Muscidae)

Fraga, Angelina Bossi; Alencar, M. M. de; Figueiredo, Leopoldo Andrade de; Razook, Alexander George; Cyrillo, Joslaine Noely dos Santos Gonçalves

doi:10.1590/s1415-47572005000200011

Cited by 10 publications

(12 citation statements)

References 6 publications

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“…Because infestation declined on both treated and control animals and no significant difference on fly numbers was found between groups, reduction in fly numbers was not attributed to the treatment itself instead it was associated with unfavorable weather conditions. This seasonal behavior of horn fly populations agrees with other studies conducted in the State of São Paulo, in which population peaks occurred in spring and summer and fly numbers dropped in winter (FRAGA et al, 2005;LIMA et al, 2003).…”

Section: Discussionsupporting

confidence: 91%

Efficacy evaluation of a commercial neem cake for control of Haematobia irritans on Nelore cattle

Chagas

Oliveira

Giglioti

et al. 2010

Rev. Bras. Parasitol. Vet.

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Much attention has been given to the development of botanical insecticides to provide effective natural control of cattle ectoparasites without harming animals, consumers, and environment. This study evaluated the efficacy of a commercial neem cake in controlling Haematobia irritans infestation on cattle. The study was conducted at the Embrapa Southeast Cattle Research Center (CPPSE), in São Carlos, SP, Brazil, from April to July 2008. The neem cake mixed in mineral salt in a 2% concentration was provided to 20 Nelore cows during nine weeks and had its efficacy evaluated by comparison of the infestation level against a control group. Fly infestations were recorded weekly by digital photographs of each animal from both groups and the number of flies was later counted in a computer-assisted image analyzer. Quantification of neem cake components by high-performance liquid chromatography revealed the presence of azadirachtin (421 mg.kg(-1)) and 3-tigloyl-azadirachtol (151 mg.kg(-1)) in the tested neem cake. Addition of the 2% neem cake reduced mineral salt intake in about 22%. The 2% neem cake treatment failed to reduce horn fly infestations on cattle during the 9-week study period.

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Section: Discussionsupporting

confidence: 91%

Efficacy evaluation of a commercial neem cake for control of Haematobia irritans on Nelore cattle

Chagas

Oliveira

Giglioti

et al. 2010

Rev. Bras. Parasitol. Vet.

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“…Fraga et al (2005), em fêmeas da raça Caracu, verificaram efeito quadrático de idade do animal sobre o número de moscasdos-chifres; a menor infestação ocorreu nos animais de 3,27 anos de idade.…”

Section: Resultsunclassified

Infestação natural de fêmeas bovinas de corte por ectoparasitas na Região Sudeste do Brasil

Silva

Alencar²,

Regitano³

et al. 2010

R. Bras. Zootec.

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RESUMO -Avaliou-se o grau de infestação natural por ectoparasitas em fêmeas bovinas de corte de três grupos genéticos. Foram realizadas contagens, de julho de 2003 a dezembro de 2004, de carrapatos (Rhipicephalus (Boophilus) microplus),moscas-dos-chifres (Haematobia irritans) e bernes (larvas de Dermatobia hominis) em fêmeas dos grupos genéticos Nelore (NE), Angus × Nelore (AN), Canchim × Nelore (CN) e Simental ×Nelore (SN) infestadas naturalmente. Foram feitas de 6 a 10 contagens em cada animal, totalizando 5.384 observações em fêmeas de sete estádios fisiológicos (bezerras, novilhas vazias, novilhas prenhes, vacas primíparas, com ou sem bezerro, e vacas pluríparas, com ou sem bezerro). Os dados, transformados por log 10 (n + 1), foram analisados pelo método dos quadrados mínimos, com um modelo estatístico que incluiu os efeitos de grupo genético da fêmea, de animal dentro de grupo genético (erro a), de ano-época da contagem, de estádio fisiológico e da interação grupo genético × ano-época da contagem. A diferença entre os grupos genéticos dependeu do ano-época da contagem, contudo, em geral, as fêmeas nelores foram as menos infestadas pelo carrapato e as Angus × Nelore, as mais infestadas pela mosca-dos-chifres e pelo berne. Houve efeito de estádio fisiológico da fêmea em todas as três características estudadas, e as diferenças variaram com a característica. Apesar da interação grupo genéitco × ano-época de contagem, existem diferenças entre os grupos genéticos Nelore, Canchim × Nelore, Angus × Nelore e Simental × Nelore quanto ao grau de infestação natural por carrapatos, por moscas-dos-chifres e por bernes. Natural infestation by external parasites in beef cattle females in southern BrazilABSTRACT -It was evaluated in this work, the degree of natural infestation by external parasites in beef cattle females from three genetic groups. Countings of cattle tick (Rhipicephalus (Boophilus) microplus), horn fly (Haematobia irritans) and beef-worm (Dermatobia hominis) were performed from July 2003 to December 2004 in females from the genetic groups Nellore (NE), Angus × Nellore (AN), Canchim × Nellore (CN), and Simmental × Nellore (SN) naturally infested. It was realized from 6 to 10 countings in each animal, totalizing 5,384 observations in females at seven physiological stages (calf; empty heifers, pregnant heifers, primiparous cows with or without calf; and pluriparous cows, with or without calf). Data, which were transformed by log 10 (n + 1), were analyzed by the least square method with a statistical model that included effects of the female genetic group, of the animal within a genetic group (error a), year-season counting, physiological state, and year-season × genetic group interaction. Differences among genetic groups depended on year-season counting; however, in general, Nellore females were the least infected by ticks, and Angus × Nellore females were the most infected by horn flies and by beef-worms.There was a physiological stage effect of the female in all the three studied characteristics and the di...

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“…The experimental period lasted from August 1, 2013, to July 16, 2015, during which parasites were counted 18 times, at the end of each grazing cycle (42 days). The horn flies were counted by digital photographs of the dorsal region of each animal (Fraga et al, 2005).The images were visualized on the computer monitor using the Microsoft Paint program to facilitate counting R. microplusadult femalesand D. hominislarvae were counted on the body of each animal to determine the parasites burdens,but we did not find significant differences between the two systems(data not shown). The experimental protocols were approved by the committee on the ethical use of animals for experimentation of Embrapa Pecuária Sudeste (PRT no.…”

Section: Ectoparasites Studymentioning

confidence: 95%

Differential Haematobia irritans infestation levels in beef cattle raised in silvopastoral and conventional pasture systems

Oliveira

Nicodemo

Gusmão

et al. 2017

Veterinary Parasitology

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The use of silvopastoral systems (SPS) can be a good alternative to reduce the environmental impacts of livestock breeding in Brazil. One of the reasons for its scarce adoption is the lack of information on health and productivity of cattle raised under these conditions. The experiment reported here was designed to compare the infestation by external parasites - the cattle tick (Rhipicephalus microplus), horn fly (Haematobia irritans), and larvae of the botfly (Dermatobia hominis) - in beef cattle raised in a SPS and a conventional pasture system (CPS), evaluated for 24 months. Data on air and soil temperature, solar radiation, wind incidence and water balance were used to characterize the SPS and CPS. R. microplus adult females and D. hominis larvae were counted on the body of each animal to determine the parasites burdens, but we did not find significant differences between the two systems. Horn flies counts on animals' body, and analysis of the horn fly and its pupal parasitoids associated with the dung pats were obtained in the two systems. Horn fly infestation was significantly lower (p=0.01) in the SPS (13.17±3.46) in comparison with the CPS (24.02±4.43). In SPS and CPS, respectively, the mean densities of pupae of H. irritansin dung pats were 9.8 and 10.7; the mean density of adults of H. irritans, 3.7 and 3.5; and the density of its pupal parasitoids were 20.5 and 5.4. The effect of production system was significant (p<0.05) only for the occurrence of pupal parasitoids of the horn fly, where the greatest occurrences of these natural enemies were in the SPS. These data indicate that natural enemies were able to control, at least partially, the horn fly populations in the cattle.

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Genetic analysis of the infestation of females of the Caracu cattle breed by Horn Fly (Haematobia irritans irritans) (L.) (Diptera, Muscidae)

Cited by 10 publications

References 6 publications

Efficacy evaluation of a commercial neem cake for control of Haematobia irritans on Nelore cattle

Efficacy evaluation of a commercial neem cake for control of Haematobia irritans on Nelore cattle

Infestação natural de fêmeas bovinas de corte por ectoparasitas na Região Sudeste do Brasil

Differential Haematobia irritans infestation levels in beef cattle raised in silvopastoral and conventional pasture systems

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