Allegheny blackberry
Rubus allegheniensisOzone 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).
 Healthy Allegheny Blackberry Leaf
Courtesy, Ozone Biomonitoring Program |
 Healthy Allegheny Blackberry Leaf
Courtesy, Ozone Biomonitoring Program |
 Photo of Ozone Injured Allegheny Blackberry
Courtesy, USDA Ozone Biomonitoring Program |
 Photo of Ozone Injured Allegheny Blackberry
Courtesy, USDA Ozone Biomonitoring Program |