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The disease development of grape downy mildew is known to be heavily reliant on the efficiency of the asexual propagation cycles. Kiefer et al. (2002) demonstrated that the early development of Plasmopara viticola is regulated specifically and coordinately by unknown factors originating from the host grapevine plant Vitis vinifera. [13]
Downy mildew refers to any of several types of oomycete microbes that are obligate parasites of plants. Downy mildews exclusively belong to the Peronosporaceae family. In commercial agriculture , they are a particular problem for growers of crucifers , grapes and vegetables that grow on vines.
Diseases of Grapevines, information from Cooperative Extension; Common Names of Diseases, The American Phytopathological Society; SAFECROP - Proceedings of the 5th International Workshop on Grapevine Downy and Powdery Mildew; virus diseases of the grapevine
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These pests included not only the Great French Wine Blight caused by the aphid Phylloxera vastatrix, but also mildew and other diseases caused by fungi. [7] [note 1] After the downy mildew had struck, botany professor Pierre-Marie-Alexis Millardet of the University of Bordeaux studied the disease in vineyards of the Bordeaux region. Millardet ...
A cartoon from Punch from 1890: The phylloxera, a true gourmet, finds out the best vineyards and attaches itself to the best wines. [1]The Great French Wine Blight was a severe blight of the mid-19th century that destroyed many of the vineyards in France and laid waste to the wine industry.
Some downy mildew genera have a more restricted host range, e.g. Basidiophora, Paraperonospora, Protobremia and Bremia on Asteraceae; Perofascia and Hyaloperonospora almost only on Brassicaceae; Viennotia, Graminivora, Poakatesthia, Sclerospora and Peronosclerospora on Poaceae, and Plasmoverna on Ranunculaceae.
The vine does face significant viticultural hazards with significant sensitivity to several viticultural hazards including rot, powdery mildew, downy mildew, and grape worms. Carignan is a late budding and ripening grape which requires a warm climate in order to achieve full physiological ripeness. [2]