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Resistance to insect growth regulator insecticides in populations of sheep lice as assessed by a moulting disruption assay

Low‐volume, backline applications with the benzoylphenyl urea insecticides triflumuron and diflubenzuron represent in excess of 70% of treatments for the control of sheep lice, Bovicola ovis (Schrank) (Phthiraptera: Trichodectidae), in Australia. Reports of reduced effectiveness from 2003 and subseq...

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Published in:	Medical and veterinary entomology 2008-12, Vol.22 (4), p.326-330
Main Authors:	JAMES, P. J., CRAMP, A. P., HOOK, S. E.
Format:	Article
Language:	English
Subjects:	Animals Benzamides - pharmacology Biological Assay Bovicola ovis diflubenzuron Diflubenzuron - pharmacology Insecticide Resistance Insecticides - pharmacology Lice Infestations - drug therapy Lice Infestations - veterinary Molting - drug effects Nymph - drug effects Ovis Phthiraptera Phthiraptera - drug effects resistance Trichodectidae triflumuron
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creator	JAMES, P. J. CRAMP, A. P. HOOK, S. E.
description	Low‐volume, backline applications with the benzoylphenyl urea insecticides triflumuron and diflubenzuron represent in excess of 70% of treatments for the control of sheep lice, Bovicola ovis (Schrank) (Phthiraptera: Trichodectidae), in Australia. Reports of reduced effectiveness from 2003 and subsequent controlled treatment trials suggested the emergence of resistance to these compounds in B. ovis populations. A laboratory assay based on the measurement of moulting success in nymphs was developed and used to assess susceptibility to diflubenzuron and triflumuron in louse populations collected from sheep where a control failure had occurred. These tests confirmed the development of resistance to triflumuron and diflubenzuron in at least two instances, with estimated resistance ratios of 67–94X at LC50.
doi_str_mv	10.1111/j.1365-2915.2008.00753.x
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These tests confirmed the development of resistance to triflumuron and diflubenzuron in at least two instances, with estimated resistance ratios of 67–94X at LC50.</description><identifier>ISSN: 0269-283X</identifier><identifier>EISSN: 1365-2915</identifier><identifier>DOI: 10.1111/j.1365-2915.2008.00753.x</identifier><identifier>PMID: 19120959</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Publishing Ltd</publisher><subject>Animals ; Benzamides - pharmacology ; Biological Assay ; Bovicola ovis ; diflubenzuron ; Diflubenzuron - pharmacology ; Insecticide Resistance ; Insecticides - pharmacology ; Lice Infestations - drug therapy ; Lice Infestations - veterinary ; Molting - drug effects ; Nymph - drug effects ; Ovis ; Phthiraptera ; Phthiraptera - drug effects ; resistance ; Trichodectidae ; triflumuron</subject><ispartof>Medical and veterinary entomology, 2008-12, Vol.22 (4), p.326-330</ispartof><rights>2008 The State of Queensland through the Department of Primary Industries Journal compilation © 2008 The Royal Entomological Society</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4353-8293e9fe846c9e4dc925fb35c03b8744ff2ec039f5755019c717933314aca9d83</citedby><cites>FETCH-LOGICAL-c4353-8293e9fe846c9e4dc925fb35c03b8744ff2ec039f5755019c717933314aca9d83</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/19120959$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>JAMES, P. J.</creatorcontrib><creatorcontrib>CRAMP, A. P.</creatorcontrib><creatorcontrib>HOOK, S. E.</creatorcontrib><title>Resistance to insect growth regulator insecticides in populations of sheep lice as assessed by a moulting disruption assay</title><title>Medical and veterinary entomology</title><addtitle>Med Vet Entomol</addtitle><description>Low‐volume, backline applications with the benzoylphenyl urea insecticides triflumuron and diflubenzuron represent in excess of 70% of treatments for the control of sheep lice, Bovicola ovis (Schrank) (Phthiraptera: Trichodectidae), in Australia. Reports of reduced effectiveness from 2003 and subsequent controlled treatment trials suggested the emergence of resistance to these compounds in B. ovis populations. A laboratory assay based on the measurement of moulting success in nymphs was developed and used to assess susceptibility to diflubenzuron and triflumuron in louse populations collected from sheep where a control failure had occurred. 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J.</creatorcontrib><creatorcontrib>CRAMP, A. P.</creatorcontrib><creatorcontrib>HOOK, S. E.</creatorcontrib><collection>Istex</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Entomology Abstracts (Full archive)</collection><jtitle>Medical and veterinary entomology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>JAMES, P. J.</au><au>CRAMP, A. P.</au><au>HOOK, S. 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subjects	Animals Benzamides - pharmacology Biological Assay Bovicola ovis diflubenzuron Diflubenzuron - pharmacology Insecticide Resistance Insecticides - pharmacology Lice Infestations - drug therapy Lice Infestations - veterinary Molting - drug effects Nymph - drug effects Ovis Phthiraptera Phthiraptera - drug effects resistance Trichodectidae triflumuron
title	Resistance to insect growth regulator insecticides in populations of sheep lice as assessed by a moulting disruption assay
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