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Mallow ninebark

Physocarpus malvaceus

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 Mallow ninebark Flowers
Courtesy, Washington State University
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Healthy Mallow ninebark Flowers
Courtesy, Virginia Tech Forestry Department

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Ozone Injury to Mallow ninebark
Courtesy, LWF Ozone Injury Databank
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Ozone Injury to Mallow ninebark
Courtesy, LWF Ozone Injury Databank
updated on 09/17/2006  I   http://nature.nps.gov/air/Pubs/bioindicators/mallowNinebark.cfm   I  Email: Webmaster