Desenvolvimento de Haematobia irritans em massas fecais de bovinos mantidas em laboratório

Barros, Antônio Thadeu Medeiros de

doi:10.1590/s0100-204x2002000200014

Cited by 8 publications

(3 citation statements)

References 6 publications

(6 reference statements)

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“…Development of pyrethroid resistance in horn flies can be quite a fast phenomenon and may take just 20-30 generations (BYFORD et al, 1999) or 3-4 years to reach perceptible levels. In Brazil, horn flies may produce about 20 generations per year (BARROS, 2002;RODRIGUES;MARCHINI, 2001), thus making development of resistance a fast process if favorable selection pressure is imposed on the population. Moreover, pyrethroid products have dominated the national market for bovine ectoparasiticide products (SINDAN, 2001(SINDAN, , 2003 since before the horn fly entered the country.…”

Section: Resultsmentioning

confidence: 99%

Susceptibility of the horn fly, Haematobia irritans irritans (Diptera: Muscidae), to insecticides in Brazil

Barros

Saueressig

Gomes

et al. 2012

Rev. Bras. Parasitol. Vet.

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Since horn fly populations became established throughout Brazil, complaints regarding control failure have increased around the country. A broad survey to evaluate the susceptibility of horn flies to both organophosphate (OP) and pyrethroid insecticides was conducted from October 2000 to April 2003. Bioassays using filter papers impregnated with cypermethrin, permethrin or diazinon were conducted on 154 horn fly populations in 14 states and 78 municipalities. Resistance to cypermethrin, the active ingredient present in most insecticide products for horn fly control in Brazil, was detected in 98.46% of the populations, with resistance ratios (RR) ranging from 2.5 to 719.9. Resistance to permethrin (RRs ≤ 6.3) was found in 96.67% of the populations, despite its lack of use. In general, pyrethroid resistance was detected in 97.18% of the horn fly populations, with frequencies greater than 87% in all regions of the country. The status of susceptibility of horn fly populations in Brazil to insecticides can be characterized by high susceptibility to OPs and widespread resistance to pyrethroids, potentially compromising the efficacy of pyrethroid products in most cases. Although some partial results have previously been presented, a general picture of horn fly susceptibility in Brazil is presented here for the first time.Keywords: Horn flies, pyrethroid resistance, parasite resistance. ResumoDesde a dispersão da mosca-dos-chifres, no Brasil, queixas sobre seu controle aumentaram em todo o país. Um amplo levantamento objetivando avaliar a suscetibilidade da mosca a inseticidas organofosforados (OF) e piretróides foi realizado de outubro de 2000 a abril de 2003. Bioensaios com papéis de filtro impregnados com cipermetrina, permetrina ou diazinon foram conduzidos em 154 populações da mosca-dos-chifres de 14 Estados e 78 municípios. Resistência à cipermetrina, ingrediente ativo presente na maioria dos produtos para controle da mosca-dos-chifres no Brasil, foi detectada em 98,46% das populações, com fatores de resistência (FR) variando de 2,5 a 719,9. Resistência à permetrina (FR ≤ 6,3) foi encontrada em 96,67% das populações testadas, apesar da falta de uso de produtos contendo este princípio ativo. Em geral, resistência a piretróides foi detectada em 97,18% das populações, com frequências acima de 87% em todas as regiões do país. A situação da suscetibilidade da mosca-dos-chifres a inseticidas, no Brasil, pode ser caracterizada por uma elevada suscetibilidade aos organofosforados e ocorrência generalizada de resistência aos piretróides, potencialmente comprometendo a eficácia desses produtos na maioria dos casos. Embora resultados parciais tenham sido apresentados anteriormente, um quadro geral da suscetibilidade da mosca-dos-chifres no Brasil é apresentado pela primeira vez.Palavras-chave: Mosca-dos-chifres, resistência a piretróides, resistência parasitária.

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Section: Resultsmentioning

confidence: 99%

Susceptibility of the horn fly, Haematobia irritans irritans (Diptera: Muscidae), to insecticides in Brazil

Barros

Saueressig

Gomes

et al. 2012

Rev. Bras. Parasitol. Vet.

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“…Organophosphates have been used for horn fly control since the early 1960s, when fenchlorphos, malathion and stirophos were introduced. Currently, the most utilized compound in this class is diazinon, which provides adequate control of pyrethroid‐resistant populations under field conditions (Cilek & Knapp, 1993; Cilek et al , 1995; Crosby et al , 1991; Byford et al , 1999; Guglielmone et al , 2000a; Barros, 2002; Li et al , 2003, 2007) (see below). Another OP insecticide currently used is ethion, which has also proved effective in the control of pyrethroid‐resistant populations (Anziani et al , 2000).…”

Section: Insecticide Controlmentioning

confidence: 99%

Insecticide resistance in the horn fly: alternative control strategies

Oyarzún

Quiróz

Birkett

2008

Medical Vet Entomology

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. The horn fly, Haematobia irritans (Linnaeus 1758) (Diptera: Muscidae) is one of the most widespread and economically important pests of cattle. Although insecticides have been used for fly control, success has been limited because of the development of insecticide resistance in all countries where the horn fly is found. This problem, along with public pressure for insecticide-free food and the prohibitive cost of developing new classes of compounds, has driven the investigation of alternative control methods that minimize or avoid the use of insecticides. This review provides details of the economic impact of horn flies, existing insecticides used for horn fly control and resistance mechanisms. Current research on new methods of horn fly control based on resistant cattle selection, semiochemicals, biological control and vaccines is also discussed.

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“…The excessive and incorrect use of adulticides employed to control other parasites, such as the Haematobia irritans fly [8][9][10], led to the exasperation of the resistance situation that can be found in the country, where it can be observed that the ticks developed resistance to practically all commercially available adulticides [3].…”

Section: Introductionmentioning

confidence: 99%

Diflubenzuron Effectiveness in Cattle Tick(Rhipicephalus Boophilus microplus) Control in Field Conditions

Andreotti

Garcia²,

Matias³

et al. 2015

Pharm Anal Acta

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Considerable economic losses are currently caused by Rhipicephalus microplus, a cattle ectoparasite occurring in tropical and subtropical areas. Significant efforts to control this tick are made in most of the bovine producing countries, mainly with acaricides. Chemical control, albeit predominant, has been hampered by poor utilization of active principles, leading to development of resistance. This work has the objective of evaluating the diflubenzuron activity as a larvicide in cattle tick control in the field conditions. Thirty females of the 3/4 Holstein x ¼ Zebu breed were used, half for each group during a year were, the control group and the group treated with diflubenzuron 3%, which was provided with the salt in the trough, available to all animals throughout the day. The animals were managed every 14 days for tick count, weight verification and to observe their well-being. Animals having above 100 engorged ticks were treated by spraying (DDVP-Diclorvós, 60 grams, Clorpirifós, 20 grams, and solution, 20 grams). Based on tick biology and histology the Diflubenzuron 3% did not affect the development of ticks that survived the parasitic phase. The effect is in the tick larvae only and the efficacy is about 54, 6% of protection using Diflubenzuron 3% in the salt. The use of acaricides when associated to diflubenzuron 3% reduce in 71% the use these acaricides and the cost of acaricide in aspersion represent when compared with diflubenzuron 3% only 7,9 %. The use of diflubenzuron 3% associated with chemical control is an effective proposal to cattle tick control with low contamination that should be thought by the production chain their cost/benefit taking into account the economic and environmental issues.

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Desenvolvimento de Haematobia irritans em massas fecais de bovinos mantidas em laboratório

Cited by 8 publications

References 6 publications

Susceptibility of the horn fly, Haematobia irritans irritans (Diptera: Muscidae), to insecticides in Brazil

Susceptibility of the horn fly, Haematobia irritans irritans (Diptera: Muscidae), to insecticides in Brazil

Insecticide resistance in the horn fly: alternative control strategies

Diflubenzuron Effectiveness in Cattle Tick(Rhipicephalus Boophilus microplus) Control in Field Conditions

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