Home About Us Search Newsletters Weather / Climate Viticulture Pest management Scouting guide Publications Calendar of events Industry links Contacts Download Adobe Acrobat Reader to view pdf files.	Peach rosette mosaic virus decline - Peach rosette mosaic virus Annemiek Schilder, MSU Plant Pathology Home > Scouting guide> peach mosaic virus This virus occurs only in Concord and Catawba grapes in Michigan. Symptoms appear 3 to 4 years after infection. The plant canopy is umbrellalike with shortened and crooked inter-nodes. Leaves are misshapen with a flattened base. Clusters are scraggly and may shell berries. Infected vines lack vigor, are prone to winter injury and may die after several years. The virus is spread by nematodes, infected planting stock and grape pomace. The virus also infects peaches and perennial weeds such as dandelion, horse nettle and curly dock. Boron deficiency and fanleaf degeneration may mimic this disease. Healthy shoot. Dead and dying vines in a circular pattern, and an infected shoot with short internodes.
Additional information Search MSU Extension News for Agriculture site Search MSU Fruit CAT Alert newsletter for articles. Type in keyword: Peach rosette mosaic virus MSU Diagnostic Services Special grape disease problems and controls (from Michigan Fruit Management Guide) (Download Adobe Acrobat Reader to view PDF files)
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Funding for this web site provided by Project GREEEN, American Farmland Trust, EPA Region 5's Strategic Agricultural Initiative program, The National Foundation for IPM Education, the Center for Agricultural Partnerships and the MSU Integrated Pest Management Program in collaboration with MSU Extension and the Michigan Agricultural Experiment Station. Partially support from NC-IPM Center. 05/26/11 Contact: E. Haney