Grapevine mildew: locut. Downy mildew (*) of the vine is a disease originating in America. Downy mildew is present everywhere in the world where vines are cultivated and where climatic conditions are favorable. It is due to a fungus Plasmospora viticola responsible for a fungal disease of the vine which develops on all the green organs: twigs, leaves, clusters, tendrils. This disease infects most species of the genus Vitis. The cultivars of the vinifera species are there ...
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