Grove of dying trees in a commercial landscape in Foster City, CA
Photo Gallery
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P. siskiyouensis disease symptoms on Italian alder  |
P. pinifolia on Pinus radiata  Pinus radiata, note grey and collapsed needle bases |
P. tentaculata sporangium  Papillate sporangium of P. tentaculata |
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P. cambivora sporangium  Ovoid non- papillate sporangia |
P. cambivora inactive lesion on chinquapin  Inactive lesion of P. cambivora on chinquapin |
P. pseudosyringae sporangia  Ovoid, semipapillate sporangia showing sympodial development of sporangiophore |
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P. lateralis on Port Orford cedar  Typical decline of Chaemacyparis lawsoniana in Landrévarzec, France. |
P. megakarya chlamydospore 
Terminal chlamydospore of P. megakarya
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P. cactorum oogonium  Oogonium with paragynous antheridia close to oogonial stalk. Oospores are slightly aplerotic. |
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P. pluvialis on Pinus radiata in New Zealand  Lesions consistent with the presence of red needle cast disease are more abundant at the base of Pinus radiata needles as indicated by the arrow. |
P. tentaculata oogonia and antheridia  Oospores and oogonia with mostly paragynous but some amphigynous antheridia of P. tentaculata |
Basal canker on Port Orford Cedar stump  |