Mature, riparian common alder (A. glutinosa) stand heavily impacted by root and collar rot caused by P. alni
Photo Gallery
|
P. alni symptoms on European Alder  |
P. frigida sporangia  Noncaducous sporangia showing ovoid shape and papillate condition |
P. frigida symptoms 4  Black wattle timber with symptoms of gummosis |
|
P. pluvialis sporangia.  P. pluvialis sporangia on tape peel from infected Douglas-fir needle. |
P. cambivora disease symptoms  Crown symptoms of Ink disease on sweet chestnut |
P. alni canker on gray alder  Grey alder (A. incana) with collar rot caused by P. alni |
|
P. cambivora oogonium  P. cambivora oogonium with antheridium |
P. pinifolia on Pinus radiata  Pinus radiata impacted by DFP, note healthy new growth |
Port Orford cedar seedlings  Raised beds for testing disease resistance of Port-Orford-cedar seedlings at the Dorena Genetic Resource Center |
|
P. agathidicida oospores in planta  Oospores in the roots of kauri seedlings inoculated with P. agathidicida. The root has been cleared with potassium hydroxide and bleached with peroxide before being stained with trypan blue (scale bar =100 µm). |
P. lateralis on Port Orford Cedar  Horticultural planting of Port-Orford cedar, photo from USDA Forest Service, Dorena Genetic Resource Center |
P. katsurae sporangia  Papillate, non-caducous sporangium with differentiated content; photo used with permission from Q-bank |