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.	Ozone injury Tom Zabadal , MSU Horticulture Home > Scouting guide> ozone injury   Some grape varieties, including Concord and Chambourcin, are highly susceptible to injury from ozone, which originates from lightning storms or industrial pollution. This injury becomes more severe with increased exposure to ozone. Therefore, the injury is most severe on older, basal leaves and less severe or non-existent on the very youngest leaves (photo at left). Injury is concentrated on leaves on the canopy’s exposed exterior. Close examination of darkened leaf areas will reveal that the small veins remain light-colored or green. An injured Concord grapevine. Exposed and older leaves are most affected. Photos: Tom Zabadal Mild injury on a Catawba grape leaf. The veins of the leaves remain light-colored. Photo: T. Zabadal
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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