Insecticide susceptibility of horn flies, Haematobia irritans (Diptera: Muscidae), in the State of Mato Grosso do Sul, Brazil.

Horn flies from wild populations were collected on cattle and exposed to filter papers impregnated with cypermethrin, permethrin, or diazinon and mortality was assessed after two hours. Resistance to cypermethrin was detected in all populations, with resistance ratios (RR) ranging from 27.6 to 91.3-fold. Permethrin bioassays provided apparently low levels of resistance (RR<5), however, resistant flies were found in 96.9% of the populations based on diagnostic concentrations. From both pyrethroid bioassays, resistance was detected in 97.4% of the populations. On the other hand, a high susceptibility to diazinon (RR d 1.1) was detected in all populations. Pyrethroid products, most cypermethrin (92.3%) and deltamethrin (66.7%), were used in all ranches controlling horn flies (97.5%). Insecticide treatments, usually incorrectly applied, were routinely delivered by manual backpack sprayers in most ranches (84.5%). This profile of insecticide use helps to explain the widespread resistance of horn flies to pyrethroids in the state as well as their high susceptibility to the organophosphate. Inadequate control practices contribute to aggravate the resistance problem and its consequences.

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Bibliographic Details
Main Authors: BARROS, A. T. M., GOMES, A., KOLLER, W. W.
Other Authors: Wilson Werner Koller, CNPGC.
Format: Artigo de periódico biblioteca
Language:English
eng
Published: 2007-12-06
Subjects:Mosca-do-chifre, Piretróide, Mato Grosso do Sul, Brasil, Horn flies, Pyrethroid, Organophosphate., Haematobia Irritans, Sanidade Animal., Resistência a Pesticida, animal health, Brazil, pesticide resistance.,
Online Access:http://www.alice.cnptia.embrapa.br/alice/handle/doc/326335
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spelling dig-alice-doc-3263352017-08-16T04:21:49Z Insecticide susceptibility of horn flies, Haematobia irritans (Diptera: Muscidae), in the State of Mato Grosso do Sul, Brazil. BARROS, A. T. M. GOMES, A. KOLLER, W. W. Wilson Werner Koller, CNPGC. Mosca-do-chifre Piretróide Mato Grosso do Sul Brasil Horn flies Pyrethroid Organophosphate. Haematobia Irritans Sanidade Animal. Resistência a Pesticida animal health Brazil pesticide resistance. Horn flies from wild populations were collected on cattle and exposed to filter papers impregnated with cypermethrin, permethrin, or diazinon and mortality was assessed after two hours. Resistance to cypermethrin was detected in all populations, with resistance ratios (RR) ranging from 27.6 to 91.3-fold. Permethrin bioassays provided apparently low levels of resistance (RR<5), however, resistant flies were found in 96.9% of the populations based on diagnostic concentrations. From both pyrethroid bioassays, resistance was detected in 97.4% of the populations. On the other hand, a high susceptibility to diazinon (RR d 1.1) was detected in all populations. Pyrethroid products, most cypermethrin (92.3%) and deltamethrin (66.7%), were used in all ranches controlling horn flies (97.5%). Insecticide treatments, usually incorrectly applied, were routinely delivered by manual backpack sprayers in most ranches (84.5%). This profile of insecticide use helps to explain the widespread resistance of horn flies to pyrethroids in the state as well as their high susceptibility to the organophosphate. Inadequate control practices contribute to aggravate the resistance problem and its consequences. 2017-04-16T11:57:53Z 2017-04-16T11:57:53Z 2007-12-06 2007 2017-04-16T11:57:53Z Artigo de periódico Revista Brasileira de Parasitologia Veterinária, São Paulo, v. 16. n. 3, p. 145-151, jul./set. 2007. http://www.alice.cnptia.embrapa.br/alice/handle/doc/326335 en eng openAccess
institution EMBRAPA
collection DSpace
country Brasil
countrycode BR
component Bibliográfico
access En linea
databasecode dig-alice
tag biblioteca
region America del Sur
libraryname Sistema de bibliotecas de EMBRAPA
language English
eng
topic Mosca-do-chifre
Piretróide
Mato Grosso do Sul
Brasil
Horn flies
Pyrethroid
Organophosphate.
Haematobia Irritans
Sanidade Animal.
Resistência a Pesticida
animal health
Brazil
pesticide resistance.
Mosca-do-chifre
Piretróide
Mato Grosso do Sul
Brasil
Horn flies
Pyrethroid
Organophosphate.
Haematobia Irritans
Sanidade Animal.
Resistência a Pesticida
animal health
Brazil
pesticide resistance.
spellingShingle Mosca-do-chifre
Piretróide
Mato Grosso do Sul
Brasil
Horn flies
Pyrethroid
Organophosphate.
Haematobia Irritans
Sanidade Animal.
Resistência a Pesticida
animal health
Brazil
pesticide resistance.
Mosca-do-chifre
Piretróide
Mato Grosso do Sul
Brasil
Horn flies
Pyrethroid
Organophosphate.
Haematobia Irritans
Sanidade Animal.
Resistência a Pesticida
animal health
Brazil
pesticide resistance.
BARROS, A. T. M.
GOMES, A.
KOLLER, W. W.
Insecticide susceptibility of horn flies, Haematobia irritans (Diptera: Muscidae), in the State of Mato Grosso do Sul, Brazil.
description Horn flies from wild populations were collected on cattle and exposed to filter papers impregnated with cypermethrin, permethrin, or diazinon and mortality was assessed after two hours. Resistance to cypermethrin was detected in all populations, with resistance ratios (RR) ranging from 27.6 to 91.3-fold. Permethrin bioassays provided apparently low levels of resistance (RR<5), however, resistant flies were found in 96.9% of the populations based on diagnostic concentrations. From both pyrethroid bioassays, resistance was detected in 97.4% of the populations. On the other hand, a high susceptibility to diazinon (RR d 1.1) was detected in all populations. Pyrethroid products, most cypermethrin (92.3%) and deltamethrin (66.7%), were used in all ranches controlling horn flies (97.5%). Insecticide treatments, usually incorrectly applied, were routinely delivered by manual backpack sprayers in most ranches (84.5%). This profile of insecticide use helps to explain the widespread resistance of horn flies to pyrethroids in the state as well as their high susceptibility to the organophosphate. Inadequate control practices contribute to aggravate the resistance problem and its consequences.
author2 Wilson Werner Koller, CNPGC.
author_facet Wilson Werner Koller, CNPGC.
BARROS, A. T. M.
GOMES, A.
KOLLER, W. W.
format Artigo de periódico
topic_facet Mosca-do-chifre
Piretróide
Mato Grosso do Sul
Brasil
Horn flies
Pyrethroid
Organophosphate.
Haematobia Irritans
Sanidade Animal.
Resistência a Pesticida
animal health
Brazil
pesticide resistance.
author BARROS, A. T. M.
GOMES, A.
KOLLER, W. W.
author_sort BARROS, A. T. M.
title Insecticide susceptibility of horn flies, Haematobia irritans (Diptera: Muscidae), in the State of Mato Grosso do Sul, Brazil.
title_short Insecticide susceptibility of horn flies, Haematobia irritans (Diptera: Muscidae), in the State of Mato Grosso do Sul, Brazil.
title_full Insecticide susceptibility of horn flies, Haematobia irritans (Diptera: Muscidae), in the State of Mato Grosso do Sul, Brazil.
title_fullStr Insecticide susceptibility of horn flies, Haematobia irritans (Diptera: Muscidae), in the State of Mato Grosso do Sul, Brazil.
title_full_unstemmed Insecticide susceptibility of horn flies, Haematobia irritans (Diptera: Muscidae), in the State of Mato Grosso do Sul, Brazil.
title_sort insecticide susceptibility of horn flies, haematobia irritans (diptera: muscidae), in the state of mato grosso do sul, brazil.
publishDate 2007-12-06
url http://www.alice.cnptia.embrapa.br/alice/handle/doc/326335
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AT gomesa insecticidesusceptibilityofhornflieshaematobiairritansdipteramuscidaeinthestateofmatogrossodosulbrazil
AT kollerww insecticidesusceptibilityofhornflieshaematobiairritansdipteramuscidaeinthestateofmatogrossodosulbrazil
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