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Tree-of-heaven

Ailanthus altissima

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 Tree-of-heaven Leaves
Courtesy, Virginia Tech Forestry Department
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Healthy Tree-of-heaven Leaves
Courtesy, Virginia Tech Forestry Department

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Ozone Injury to Tree-of-heaven Leaf
Courtesy, Dr. Don Davis
Pennsylvania State University
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Ozone Injury to Tree-of-heaven Leaves
LWF Ozone Injury Databank
updated on 09/17/2006  I   http://www.nature.nps.gov/air/Pubs/bioindicators/treeofheaven.cfm   I  Email: Webmaster