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Big-leaf aster

Aster macrophyllus

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 Big-leaf aster Plant
Courtesy, USDA Ozone Biomonitoring Program

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Ozone Injury to Big-leaf aster
Courtesy, Wisconsin State Herbarium
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Ozone Injury to Big-leaf aster
Courtesy, www.borealforest.org

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Ozone Injury to Big-leaf aster Leaf
Courtesy, USDA Ozone Biomonitoring Program
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Ozone Injury to Big-leaf aster Leaf
Courtesy, USDA Ozone Biomonitoring Program

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Ozone Injury to Big-leaf aster Leaf
Courtesy, USDA Ozone Biomonitoring Program
updated on 09/17/2006  I   http://www.nature.nps.gov/air/Pubs/bioindicators/bigleafAster.cfm   I  Email: Webmaster