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Pacific ninebark

Physocarpus capitatus

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 Pacific ninebark Leaf
Courtesy, USDA Ozone Biomonitoring Program

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Ozone Injury to Pacific ninebark Leaf
Courtesy, USDA Ozone Biomonitoring Program
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Pacific ninebark Leaf with Ozone Injury
Courtesy, USDA Ozone Biomonitoring Program

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Ozone Injury to Pacific ninebark Leaf
Courtesy, USDA Ozone Biomonitoring Program
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Healthy Pacific ninebark Plant
Courtesy, USDA PLANTS Database
updated on 09/17/2006  I   http://nature.nps.gov/air/Pubs/bioindicators/pacificNinebark.cfm   I  Email: Webmaster