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Journal articles
Vineyard evaluation of stilbenoid‐rich grape cane extracts against downy mildew: a large‐scale study
Abstract : BACKGROUND:
Plasmopara viticola control in organic viticulture requires copper-based fungicides with harmful effects on health and the environment. Plant extracts represent a biorational eco-friendly alternative to copper. The aim of this study was to evaluate the potential of stilbenoid-rich grape cane extract (GCE) against downy mildew on three cultivars over 3 years following natural downy mildew infection.
RESULTS:
Over all field trials, GCE treatments showed an average reduction in disease incidence of -35% and -38% on leaves and clusters, respectively. The average reduction in disease severity was -35% and -43% on leaves and clusters, respectively. Under artificial downy mildew infection, GCE efficacy corresponded to 1 g L-1 of copper. Neither phytotoxicity nor adverse effects on auxiliary fauna were observed after treatment with GCE.
CONCLUSION:
Because few or no biocontrol agents are active alone against P. viticola, GCE is a promising alternative to copper-based fungicides. Grape canes, an abundant by-product of viticulture, have great potential for valorization as a biocontrol agent for sustainable viticulture.
https://hal-univ-tours.archives-ouvertes.fr/hal-02527716
Contributor : Sébastien Besseau <>
Submitted on : Wednesday, April 1, 2020 - 1:27:59 PM
Last modification on : Saturday, June 6, 2020 - 3:25:02 AM
Contributor : Sébastien Besseau <>
Submitted on : Wednesday, April 1, 2020 - 1:27:59 PM
Last modification on : Saturday, June 6, 2020 - 3:25:02 AM