Control of the fungi Lasiodiplodia theobromae, the causal agent of dieback, in cv. syrah grapevines

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dc.creatorCarine Rusin
dc.creatorFábio Rossi Cavalcanti
dc.creatorPatrícia Carla Giloni de Lima
dc.creatorCacilda Márcia Duarte Rios Faria
dc.creatorMarcus André Kurtz Almança
dc.creatorRenato Vasconcelos Botelho
dc.date2021
dc.date.accessioned2026-07-07T03:51:59Z
dc.descriptionGrapevine trunk diseases are among the most important limiting factors of worldwide viticulture. In this context, we aimed to verify the effect of chemical fungicides, biological agents and plant extracts on the control of Lasiodiplodia theobromae in pruning wounds and their physiological effects in cv. Syrah grapevines. Plant extracts (clove, cinnamon, garlic, rosemary and lemongrass), commercial fungicides (difeconazole, tebuconazole, mancozeb, sulfur, pyraclostrobin, fosetyl-Al, and azoxystrobin), chitosan, Trichoderma harzianum and Bacillus subtilis were used for the in vitro trials. The protection of pruning wounds in the potted vines was studied using fosetyl-Al, tebuconazole, Trichoderma harzianum, Bacillus subtilis, garlic extract and clove extract. The experiments were carried out through two vegetative cycles: 2015/2016 and 2016/2017. The length of wood discoloration, pathogen re-isolation percentage, fresh mass of the pruning material, peroxidase activity, fluorescence, chlorophyll index, phenological stages, shoot length and leaf area were evaluated. The treatments with clove, garlic extract, tebuconazole, pyraclostrobin, mancozeb, fosetyl-Al and B. subtilis reduced mycelial growth by more than 90%. In the grapevines, the use of T. harzianum decreased the re-isolation of L. theobromae, but no differences were verified for the other plant evaluations. We concluded that the use of T. harzianum would be a potential option for wound protection without altering the physiological aspects of cv. Syrah grapevines.
dc.formatapplication/pdf
dc.identifier1679-9275
dc.identifierhttps://www.redalyc.org/articulo.oa?id=303067924004
dc.identifierhttps://www.redalyc.org/journal/3030/303067924004/
dc.identifierhttps://www.redalyc.org/journal/3030/303067924004/html/
dc.identifierhttps://www.redalyc.org/journal/3030/303067924004/303067924004.epub
dc.identifierhttps://www.redalyc.org/journal/3030/303067924004/movil
dc.identifier10.4025/actasciagron.v43i1.44785
dc.identifier.urihttp://hdl.handle.net/123456789/445353
dc.languageen
dc.publisherUniversidade Estadual de Maringá
dc.relationhttp://www.redalyc.org/revista.oa?id=3030
dc.rightsActa Scientiarum. Agronomy
dc.sourceActa Scientiarum. Agronomy (Brasil) Vol.43
dc.subjectAgrociencias
dc.titleControl of the fungi Lasiodiplodia theobromae, the causal agent of dieback, in cv. syrah grapevines
dc.typeartículo científico

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Acta Scientiarum. Agronomy - Universidade Estadual de Maringá