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This is a list of diseases of grapes (Vitis spp.). Bacterial diseases. Glassy-winged sharpshooter, the primary carrier of PD. Bacterial diseases;
However, there was a problem with these suggestions: French grape lice were known to infest only a vine's roots, whereas American grape lice were known to infest only its leaves. [18] The British-born American entomologist Charles Valentine Riley had been following news of the outbreak in France.
On one cluster there may be berries of various sizes which can create problems during winemaking due to the varying "skin to pulp" ratio among the grapes. [6] This can be caused by vine disease, such as fanleaf, or by a boron deficiency in the vine. Gewürztraminer and the Chardonnay clones IA and Mendoza are both prone to millerandage. [7]
Grapevine leafroll-associated virus (GLRaV) is a name for a group of viruses that infect grapevine. [1]Obscure mealybugs (Pseudococcus viburni) feed on the phloem of vines and woody-stemmed plants, especially pear and apple trees and grape vines. [2]
The placement of the grape plants is important to provide for proper aeration and lighting. “Choose a planting site where the vines will be exposed to full sun and good air circulation.” [2] Proper training of grape vines should be practiced. Many people use trellising to keep the vines off the ground. Trellising is a form of plant training ...
Grapevine trunk diseases (GTD) are the most destructive diseases of vineyards worldwide.Fungicides (such as sodium arsenite or 8-hydroxyquinoline, used to fight esca) with the potential to control GTD have been banned in Europe and there are no highly effective treatments available.
Protecting grape vines from low-temperature injury has been occurring for thousands of years. According to a report from the U.S. Department of Agriculture, "It began at least 2,000 years ago when ...
Currently, the only advised method of control is replacing infected vines with new, virus-free grapevines, which results in years of lost production until the new vines mature. [2] Economic analyses suggest replacing individual symptomatic vines if red blotch is present in less than 30% of a vineyard, and replacing the entire vineyard if red ...
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