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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Format: | Artigo de periódico biblioteca |
Language: | English eng |
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2007-12-06
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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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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 |
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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. |
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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 |
work_keys_str_mv |
AT barrosatm insecticidesusceptibilityofhornflieshaematobiairritansdipteramuscidaeinthestateofmatogrossodosulbrazil AT gomesa insecticidesusceptibilityofhornflieshaematobiairritansdipteramuscidaeinthestateofmatogrossodosulbrazil AT kollerww insecticidesusceptibilityofhornflieshaematobiairritansdipteramuscidaeinthestateofmatogrossodosulbrazil |
_version_ |
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