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. lateralis sporangia  Sporangia of P. lateralis showing internal and external proliferation |
P. cactorum oogonium  Oogonium with paragynous antheridia close to oogonial stalk. Oospores are slightly aplerotic. |
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P. cambivora disease symptoms  Crown symptoms of Ink disease on sweet chestnut |
P. cambivora colony morphology on PDA  Rosaceous colony morphology at 14 days at 20°C on PDA |
P. austrocedrae oogonia drawing  P. austrocedrae. Morphology of oogonia, oospores and antheridia. Bar: 10 mm. Greslebin et al. 2007 |
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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. cambivora oogonium  P. cambivora oogonium with antheridium |
P. austrocedrae irregular sporangium  P. austrocedrae - irregular sporangium with lateral attachment and swelling in sporangiophore |
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P. pinifolia on Pinus radiata  Pinus radiata, note Infected needles at right angles to stem |
P. austrocedrae necrotic lesion in phloem  P. austrocedrae - necrotic lesion in phloem |
Vehicle washing  Truck washing to avoid spread of P. lateralis |