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Field and laboratory screening for fluvalinate-tolerant varroa populations in Portugal

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dc.contributor.authorPires, Sancia
dc.contributor.authorMaia, Miguel
dc.contributor.authorMurilhas, António
dc.contributor.authorPereira, Óscar
dc.date.accessioned2011-06-22T11:09:39Z
dc.date.available2011-06-22T11:09:39Z
dc.date.issued2007
dc.descriptionEstudo sobre a eficácia actual do “Apistan” e do “Apivar” na luta contra a varroose em Portugalpor
dc.description.abstractFollowing widespread claims of decreasing Apistan field efficacy, a large screening project was put into practice towards trying to identify Portuguese Varroa populations highly tolerant to fluvalinate. Approximately 12 thousand field-tests were carried out, for the most part based upon the “British National Bee Unit” field-testing methodology (with an extra blank control test added). From all studied colonies, 1536 allowed for conclusive field-testing (i.e. 3 or more Varroa were submitted to fluvalinate in a given test and no abnormal Varroa mortality was found in the respective control test). Using a 60 % fluvalinate-induced Varroa mortality border line, 878 of those colonies were considered to host fluvalinate-tolerant Varroa populations. On average, 18 mites were studied per colony that tested positive for fluvalinate-tolerant Varroa populations. The overall fluvalinate therapeutic efficacy, as regards Varroa populations hosted in those colonies, was only 26.4 +- 0.6 % (mean +- s.e.m.). Capped brood samples from honey bee colonies that had field-tested positive for fluvalinate-tolerant Varroa populations were later collected to provide Varroa for laboratory reassessment of fluvalinate-tolerance (basically, following Milani’s methodology). Even though we had to discard results obtained from approximately half of the collected brood samples (adding to a total of 172 samples, as a result of the insufficient numbers of mature Varroa they hosted), in many instances field-test outcomes could be later confirmed by laboratory tests.por
dc.description.sponsorshipINGA - Programa Apícola - Acções de Melhoria da Produção e Comercialização dos Produtos Apícolaspor
dc.identifier.citationPires, Sância; Maia, Miguel; Murilhas, António; Pereira, Óscar (2007). Field and laboratory screening for fluvalinate-tolerant varroa populations in Portugal. In 40th Apimondia International Apicultural Congress. Melbournepor
dc.identifier.urihttp://hdl.handle.net/10198/5325
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherApimondiapor
dc.relation.publisherversionwww.apimondia2007.compor
dc.titleField and laboratory screening for fluvalinate-tolerant varroa populations in Portugalpor
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceMelbourne Australiapor
oaire.citation.endPage148por
oaire.citation.issueNº 229por
oaire.citation.startPage148por
oaire.citation.titleApimondia Programme & Abstracts 40th Apimondia International Apicultural congresspor
person.familyNamePires
person.givenNameSancia
person.identifier.ciencia-idCC12-1B38-26C8
person.identifier.orcid0000-0001-8427-0179
person.identifier.scopus-author-id53878422600
rcaap.rightsopenAccesspor
rcaap.typeconferenceObjectpor
relation.isAuthorOfPublicationd1319f5d-6ffc-4e2c-9035-fa06b834c88f
relation.isAuthorOfPublication.latestForDiscoveryd1319f5d-6ffc-4e2c-9035-fa06b834c88f

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