Explore Air

Ponderosa pine

Pinus ponderosa

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).



photograph
Healthy Ponderosa pine Tree
Courtesy, USDA PLANTS Database
photograph
Healthy Ponderosa pine Cone
Courtesy, USDA PLANTS Database

photograph
Healthy Ponderosa pine Needles
Courtesy, USDA PLANTS Database
photograph
Ozone Injury to Ponderosa pine Needles,
Courtesy, USDA PLANTS Database

photograph
Ozone Injury to Ponderosa pine Needles
Courtesy, USDA Ozone Biomonitoring Program
photograph
Ozone Injury to Ponderosa pine Tree
Courtesy, USDA Ozone Biomonitoring Program
updated on 09/17/2006  I   http://nature.nps.gov/air/Pubs/bioindicators/ponderosaPine.cfm   I  Email: Webmaster