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Improving photoprotection of Beauveria bassiana conidia for biological control of the cactus pest Dactylopius opuntiae in the semiarid region northeast of Brazil

dc.contributor.authorSantos, P. de S. [UNESP]
dc.contributor.authorda Silva, M. A. Q.
dc.contributor.authorMonteiro, A. C. [UNESP]
dc.contributor.authorGava, C. A. T.
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionPernambuco State Univ
dc.date.accessioned2014-05-20T13:16:36Z
dc.date.available2014-05-20T13:16:36Z
dc.date.issued2011-01-01
dc.description.abstractA technical grade conidial preparation of the entomopathogenic fungus Beauveria bassiana isolate LCB63 was exposed to ultraviolet light ( UV) from artificial and natural sources in the presence of various photoprotectants to develop a viable formulation to control Dactylopius opuntiae, a limiting pest of forage cacti in the Brazilian semiarid region. In the first experiment, Conidial viability was assessed in preparations containing water and liposoluble photoprotectants at a concentration of 1% and exposed to solar radiation for 0, 60, and 120 min. In another experiment, preparations containing different concentrations of the selected photoprotectants were exposed to natural and artificial UV radiation for 120 and 5 min, respectively. Insecticide activity of technical grade conidial preparations containing selected photoprotectants were evaluated against first instar nymphs of D. opuntiae. In general, no evaluated compounds showed deleterious effects on conidial germination, and they provided a strong degree of protection over a short period of time. One-percent concentrations of starch and skim milk resulted in low photoprotection over a longer irradiation period, while 1% Neo Heliopan AV, Neo Heliopan E1000 and Oxybenzone provided a moderate degree of protection. Increasing the concentration of Oxybenzone increased germination rate to 70%, while treatment with 1% Neo Heliopan E1000 maintained germination at 50%. A technical grade conidial preparation containing 1% Oxybenzone was effective in promoting D. opuntiae nymph mortality. These results suggested that addition of liposoluble photoprotectants could provide better photoprotection for B. bassiana LCB63 conidia in bioinsecticide formulations.en
dc.description.affiliationEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Trop Semiarid, Biol Control Lab, BR-56302970 Petrolina, Brazil
dc.description.affiliationFCAV UNESP, Dept Vegetal Prod, Jaboticabal, Brazil
dc.description.affiliationPernambuco State Univ, Petrolina, Brazil
dc.description.affiliationUnespFCAV UNESP, Dept Vegetal Prod, Jaboticabal, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFinanciadora de Estudos e Projetos (FINEP)
dc.format.extent893-902
dc.identifierhttp://dx.doi.org/10.1080/09583157.2011.586022
dc.identifier.citationBiocontrol Science and Technology. Abingdon: Taylor & Francis Ltd, v. 21, n. 8, p. 893-902, 2011.
dc.identifier.doi10.1080/09583157.2011.586022
dc.identifier.issn0958-3157
dc.identifier.urihttp://hdl.handle.net/11449/3395
dc.identifier.wosWOS:000299208400002
dc.language.isoeng
dc.publisherTaylor & Francis Ltd
dc.relation.ispartofBiocontrol Science and Technology
dc.relation.ispartofjcr0.918
dc.relation.ispartofsjr0,441
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectBiological controlen
dc.subjectDactylopius opuntiaeen
dc.subjectUV radiationen
dc.titleImproving photoprotection of Beauveria bassiana conidia for biological control of the cactus pest Dactylopius opuntiae in the semiarid region northeast of Brazilen
dc.typeArtigo
dcterms.licensehttp://journalauthors.tandf.co.uk/permissions/reusingOwnWork.asp
dcterms.rightsHolderTaylor & Francis Ltd
dspace.entity.typePublication
unesp.author.orcid0000-0003-3441-8643[4]
unesp.campusUniversidade Estadual Paulista (UNESP), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt
unesp.departmentProdução Vegetal - FCAVpt

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