Grapevine red blotch disease

Grapevine red blotch disease is a viral disease that affects grapevines. It is caused by the Grapevine red blotch-associated virus (GRBaV), a DNA virus that belongs to the family Geminiviridae. The disease is characterized by red blotches on the leaves of the grapevine, reduced sugar content in the grapes, and delayed maturity of the fruit.

Symptoms

The symptoms of grapevine red blotch disease include red blotches on the leaves, reduced sugar content in the grapes, and delayed maturity of the fruit. The red blotches are often irregular in shape and can vary in size. The blotches can appear on both the upper and lower surfaces of the leaves. The disease can also cause a reduction in the size of the grapes and a decrease in the overall yield of the vine.

Cause

Grapevine red blotch disease is caused by the Grapevine red blotch-associated virus (GRBaV). This virus is a DNA virus that belongs to the family Geminiviridae. The virus is transmitted by an insect vector, the three-cornered alfalfa hopper (Spissistilus festinus). The virus can also be spread through the use of infected plant material in grafting.

Management

Management of grapevine red blotch disease involves the use of virus-free planting material, regular monitoring of vineyards for symptoms of the disease, and control of the insect vector. Infected vines should be removed and destroyed to prevent the spread of the virus. There is currently no cure for the disease.

See also

• Grapevine diseases
• Viral diseases of plants
• Geminiviridae

References

Grapevine red blotch disease Resources
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