Variation in population density of horn flies (Haematobia irritans irritans) (L.) (Diptera: Muscidae) in Nellore cattle (Bos indicus)

Lima, Luiz Gustavo Ferraz; Perri, S. H. V.; Prado, Angelo Pires do

doi:10.1016/j.vetpar.2003.10.002

Cited by 13 publications

(15 citation statements)

References 11 publications

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“…Lima et al (2002) Nevertheless, horn fly infestation was observed throughout the year, with two infestation peaks (Figure 1), in April (also June) and October/November, coinciding with the end (autumn) and the beginning (spring) of the rainy season, respectively. Similar results were found by Lima et al (2003), in Araçatuba, SP; Barros (2001), in the Pantanal region, MS; and Bianchin et al (2006), in Campo Grande, MS.…”

Section: Resultssupporting

confidence: 85%

Efficiency of partial treatment of cattle infested with horn fly using 40% diazinon

Almeida

Alari

Seno

et al. 2013

Rev. Bras. Parasitol. Vet.

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The aim of this investigation was to evaluate the efficiency of partial treatment of animals infested with horn flies. Forty-five Guzerat cows between 4 and 7 years of age were divided into three groups (15 cows per group). The treatments were as follows: in groups G33 and G100, 33.3 and 100% of the cows were treated with one insecticide-impregnated ear tag/animal (40% diazinon), respectively, while in the group GC, the cows were not treated (control). The flies on the cervico-dorsal-lumbar region of the cows, in all three groups, were counted every 14 days. The experiment lasted from September 2006 to September 2009. Over this period, six four-month ear tag treatments, with intervals of one to two months, were conducted on both treated groups. The animals of group G33 had a higher infection than those of group G100, and the number of flies ranged from 12 to 27 (group G33) and from 3 to 11 (group G100). However, groups G33 and G100 had lower infection levels than group GC, which presented from 45 to 87 flies. Partial treatment of cattle infested with horn flies using 40% diazinon insecticide is an efficient alternative for controlling this ectoparasite.

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Section: Resultssupporting

confidence: 85%

Efficiency of partial treatment of cattle infested with horn fly using 40% diazinon

Almeida

Alari

Seno

et al. 2013

Rev. Bras. Parasitol. Vet.

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“…Similarly, scores (FS) attributed in spring and in fall were similar in magnitude to each other and were within the range of those attributed in summer, which were the highest ones, and those attributed in winter, which were the lowest ones. Lima et al (2003) observed, in Nellore cattle in Araçatuba, State of São Paulo, higher infestations of horn fly during the spring and fall. These results suggest that the infesting population of horn flies grows during the seasons favorable to its free life phase, that is, when temperature, relative humidity of the air and precipitation parameters are adequate to its development, as reported by Winslow (1992).…”

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confidence: 77%

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

et al. 2005

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The objective of this study was to evaluate environmental factors that affect infestation of Caracu cattle breed by horn fly (Haematobia irritans) and to estimate genetic parameters for level of infestation. Infestation was evaluated on females from two herds in two consecutive years. Total number of flies on animals (FC) was counted, an infestation score (FS: 1 to 5) was recorded according to the estimated number of flies on animals, and number of parasites in photographs (FF) taken when the animals were evaluated was also counted. On each animal from one to eight observations were taken. A total of 3,836, 2,751 and 3,754 records from 718 animals were obtained for FC, FF and FS, respectively. The incidence of flies was lower during winter and higher during summer, and the thicker the hair coat of the animal the greater the infestation. Heritabilities and repeatabilities were equal to 0.10 and 0.10, 0.08 and 0.12, and 0.06 and 0.08, for FC, FF and FS, respectively. Findings indicate that selection for FC will result in low genetic progress and that animals should be evaluated more than once for selection purposes.

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“…Resultados semelhantes foram descritos no Pantanal, indicando picos populacionais de moscas após o início e final da estação chuvosa, respectivamente de novembro a dezembro e de maio a junho [7]. Outros estudos também relataram que na época chuvosa ocorre aumento de infestação da mosca-dos-chifres em sistemas extensivos, associado ao aumento de temperatura ambiente e umidade, favorecendo o ciclo da mosca [1,16,21]. É importante conhecer a dinâmica populacional das moscas, pois essa informação permitirá estabelecer com maior precisão o programa de controle estratégico em épocas do aumento das infestações nos animais [43].…”

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Control of Haematobia irritans in the Minas Gerais Semiarid

Costa

Carneiro

Bastos

et al. 2016

Acta Scientiae. Vet.

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Background:Beef cattle is considered to be one of the most important economic activities, however, it presents problems in the production chain such as the occurrence of parasites that reduce the growth, performance, productivity and may cause mortalities occasionally. The chemical control is the most used alternative to reduce ectoparasites. Nevertheless, inappropriate management of insecticides has contributed to the selection of population resistant to the products available on the market. This paper aimed to evaluate the practices of management and the application of insecticides used to control horn flies in farms of dairy cattle in the North of the state of Minas Gerais. Materials, Methods & Results:It was visited 62 rural properties, which produce milk. Semi-structured questionnaires were applied in order to obtain information on the characteristics of the properties (location, size and type of the cattle), on the knowledge about the epidemiology of the horn flies, and on the practices adopted to the control of those parasites. The practices adopted include the moment of application of the insecticides, frequency of the cattle treatment, used products, method of application, number of animals treated, and choice and substitution criteria of insecticides. The data collected were tabulated in contingency tables, and they were analyzed using the chi-square test, considering a significance of 5%. The racial composition of the cattle in the farms was mainly mixed-race of unknown origin, representing 77% of the animals evaluated. In this research, it was reported a greater incidence of horn flies infestation on adult beef herd, and 23.6% of the producers reported occurrences of infestation in the whole herd, not differing by categories. The infestation peaks of the fly occurred from November to March. It was also found a greater frequency of pyrethroid use in the region (P < 0.001), where 43.1% of the producers used associations of pyrethroid or organophosphate to control the flies, high efficiency being reported. From the properties assessed, 92% presented inadequacy in the practices of control of horn flies, for instance, the lack of using cattle manure tank, the accumulation of open waste, the lack of rotation of insecticides, which can favor the selection of resistant flies. Discussion: In this paper, it was reported 77.19% of predominance of Haematobia irritans infestation from November to March mainly in animals with a higher percentage of European or mixed-race genetics. Such results corroborate with the literature, because it was verified the influence of race and hair color in the level of infestation in the animals, although, in the same race, each individual presents different susceptibilities. Taurine beef cattle are more susceptible to infestation by horn flies than zebu cattle. Thus, the lower the proportion of zebu cattle genetics in the herd, the greater the infestation. Taurine beef cattle are more infested because shows a greater number of sebaceous glands and greater concentration of testoster...

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Variation in population density of horn flies (Haematobia irritans irritans) (L.) (Diptera: Muscidae) in Nellore cattle (Bos indicus)

Cited by 13 publications

References 11 publications

Efficiency of partial treatment of cattle infested with horn fly using 40% diazinon

Efficiency of partial treatment of cattle infested with horn fly using 40% diazinon

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

Control of Haematobia irritans in the Minas Gerais Semiarid

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