Fig. 40. P. alni subsp. uniformis. Fig. 41. P. alni subsp. multiformis German variant. Fig. 42. P. alni subsp. alni. Fig. 43.
Photo Gallery
Site will be retired 9/1/2026
This site is no longer being developed and will be retired on September 1, 2026. Please contact us if you have any questions or would like to provide support to continue the project.
|
P. alni oogonia subspecies and variants  |
P. alni symptoms on European Alder  Mature, riparian common alder (A. glutinosa) stand heavily impacted by root and collar rot caused by P. alni |
P. alni sporangia  Non-papillate sporangia of P. alni showing nested proliferation. |
|
P. alni oogonia  Smooth-walled oogonium of P. alni (Swedish variant) with oospore and amphigynous antheridium. |
P. alni symptoms on European Alder  Mature, riparian common alder (A. glutinosa) stand with high impact of Phytophthora root and collar rot. |
P. alni in riparian alder, Germany  P. alni in riparian alder, Germany |
|
P. alni in alder, Illwald, France  P. alni in alder, Illwald, France |
P. alni in alder forest, Germany, with T. Jung  P. alni in alder forest, Germany, with T. Jung |
P. alni oogonium  Bullate oogonium of P. alni (German variant) with oospore and amphigynous antheridium. |
|
P. alni canker on gray alder  Grey alder (A. incana) with collar rot caused by P. alni |
P. alni basal canker on European Alder  P. alni basal canker on European Alder (Alnus glutinosa) |
P. alni in riparian alder, Scotland  P. alni in riparian alder, Scotland |