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European wine grape

Vitis vinifera

Ozone injury usually appears as black or purple spots (stipple), yellow or white bleached spots (chlorotic mottle, needle tip burn), or leaf browning (necrosis). Ozone may also cause premature leaf drop (senescence).




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Healthy European wine grape Leaves
Courtesy, UW Madison Department of Botany
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Ozone Injury to European wine grape Leaves
Courtesy, LWF Ozone Injury Database

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Ozone-injured European wine grape Leaf
Courtesy, Dr. Don Davis,
Pennsylvania State University
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Ozone-injured European wine grape
Courtesy, Dr. Don Davis,
Pennsylvania State University
updated on 09/17/2006  I   http://nature.nps.gov/air/Pubs/bioindicators/europeanWinegrape.cfm   I  Email: Webmaster