Oogonium and oospore with amphigynous antheridium
Photo Gallery
P. frigida oogonium |
P. cambivora sporangium Ovoid non-papillate sporangia with well-rounded base |
Growth of P. megakarya on corn meal agar
Growth of P. megakarya on corn meal agar |
P. palmivora sporangia
P. palmivora caducous papillate sporangia
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P. siskiyouensis canker on Italian alder Bleeding canker at the base of a tree and a sprinkler emitter (arrow) adjacent to the trunk |
P. agathadicida disease symptom Excavated lesion, with outer bark removed showing extent of disease-front |
P. pseudotsugae colony morphology on V8 P. pseudotsugae colony growth on V8 agar |
P. pseudosyringae sporangium Ovoid, semipapillate sporangia showing medium length pedicel |
P. siskiyouensis sporangia Sporangia showing a variety of shapes and orientations of semi-papillae and sporangiophores |
P. megasperma oogonium Oogonium with paragynous antheridia applied close to the ogonial stalk. |
P. tentaculata disease symptoms on California mugwort Outplanted California mugwort (Artemisia douglasiana) infected with P. tentaculata, 4.5 years after planting. Plant shows stunting and chlorosis. (P. cryptogea and P. lacustris were also baited from roots/soil of this plant). |
P. pinifolia on Pinus radiata Pinus radiata, note Stem canker associated with necrotic needles. |