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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;
Viral grape diseases (30 P) Pages in category "Grape diseases" The following 5 pages are in this category, out of 5 total. This list may not reflect recent changes. *
Phomopsis cane and leaf spot is a disease that causes symptoms in the common grapevine species, Vitis vinifera, in many regions of the world. [2] This disease is mainly caused by the fungal pathogen, Phomopsis viticola, and is known to affect many cultivars of table grapes, such as Thompson Seedless, Red Globe, and Flame Seedless. [3]
Those symptoms are related to callose deposition at the sieve plates and subsequent degeneration of the phloem. Although no resistant cultivars of Vitis vinifera or rootstocks are known so far, the various grape varieties differ considerably as far as symptom severity is concerned. Chardonnay and Riesling are among the most vulnerable varieties.
The incubation period between infection and obvious symptoms is usually one year or more, depending on the response of the plant to both pathogen and environmental circumstances. [1] Flavescence dorée has the following symptoms: [1] leaves become yellow or red, depending on the variety; downward rolling of leaves; drying of stems and grapes
This disease causes the formation of lesions on shoots, leaves, and rachises, but also can cause fruit rot. It causes significant economic damage to grape vines. Another Phomopsis species, P. juniperovora, infects junipers, and is a particularly important pest of seedlings and juvenile plants in the nursery industry.
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Mycosphaerella angulata is a major pathogen affecting the muscadine grape. Infection occurs mainly after midseason. The primary symptoms of this disease are faint chlorotic spots on the leaves. The chlorotic spots continue to grow in size during the growing season, forming angular brown lesions in the center.