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Pre-selection in laboratory tests of survival and competition before field screening of antagonistic bacterial strains against Botrytis bunch rot of grapes

hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorCALVO-GARRIDO, Carlos
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorHAIDAR, Rana
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorROUDET, Jean
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorGAUTIER, Thomas
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorFERMAUD, Marc
dc.date.accessioned2024-04-08T12:34:52Z
dc.date.available2024-04-08T12:34:52Z
dc.date.issued2018
dc.identifier.issn1049-9644
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/197283
dc.description.abstractEnWith only a few biocontrol products currently registered against Botrytis bunch rot (BBR) of grapes, there is a crucial need for new antagonistic strains that are able to survive and efficiently suppress B. cinerea under vineyard conditions. The aim of this study was to establish and follow a pre-selection process among potential antagonistic bacterial strains, previously identified in vivo for efficacy, and to carry out a further field screening assay using a reduced strain number. Ten bacterial strains were pre-selected and tested, in vitro and in vivo, to characterise their mode of action and population dynamics under simulated climatic regimes. Four candidate strains were then selected and characterised for high efficacy in vivo, known mode of action and marked survival ability. Some suitable additives for increasing strain adherence on grape berry surface were tested prior to field applications, indicating one commercial adjuvant for potential improved bacterial persistence in the field. The four strains were applied separately in an experimental Merlot vineyard near Bordeaux (SW France), either at five key phenological stages, or following a specially developed Disease Risk Index (DRI). The Bacillus ginsengihumi S38 strain treatments significantly reduced BBR incidence by 72-75% compared to the control, whereas sprays applied according to the DRI decision support system tended to improve disease control. The study validates a laboratory pre-selection process followed by a field screening step, resulting in a candidate B. ginsengihumi strain S38 with a high potential for BBR biocontrol and future development in vineyards.
dc.language.isoen
dc.publisherElsevier
dc.subjectPantoea agglomerans
dc.subject.engrey mould
dc.subject.enEnterobacter cowanii
dc.subject.enVitis vinifera
dc.subject.ennatural products
dc.subject.ensour rot
dc.title.enPre-selection in laboratory tests of survival and competition before field screening of antagonistic bacterial strains against Botrytis bunch rot of grapes
dc.typeArticle de revue
dc.identifier.doi10.1016/j.biocontrol.2018.05.006
dc.subject.halSciences du Vivant [q-bio]
dc.subject.halSciences de l'environnement
dc.description.sponsorshipEuropeInternational Mobility Programme to Strengthen Skills and Excellence in Research for Agriculture
bordeaux.journalBiological Control
bordeaux.page100-111
bordeaux.volume124
bordeaux.hal.laboratoriesSanté et Agro-Ecologie du Vignoble (SAVE) - UMR 1065*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02621158
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02621158v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Biological%20Control&rft.date=2018&rft.volume=124&rft.spage=100-111&rft.epage=100-111&rft.eissn=1049-9644&rft.issn=1049-9644&rft.au=CALVO-GARRIDO,%20Carlos&HAIDAR,%20Rana&ROUDET,%20Jean&GAUTIER,%20Thomas&FERMAUD,%20Marc&rft.genre=article


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