Bleeding canker on red oak (Quercus rubra)
Photo Gallery
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P. cactorum bleeding canker  |
P. cambivora colony morphology on MA  Rosacous colony morphology at 14 days at 20°C on MA |
P. tentaculata sporangium  Papillate sporangium of P. tentaculata |
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P. arenaria sporangia  Globose papillate sporangia of Phytophthora arenaria on V8 agar flooded with soil extract. (Scale bar = 20 μm) |
P. pluvialis on Pinus radiata in New Zealand  A Pinus radiata needle showing faded olive- or khaki- coloured lesions consistent with the presence of red needle cast disease. Arrow shows resinous bands within the extended olive lesion. |
P. ramorum bleeding canker  Bark cracks with black ooze in coast live oak, a symptom of P. ramorum canker. |
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P. alni symptoms on European Alder  Mature, riparian common alder (A. glutinosa) stand with high impact of Phytophthora root and collar rot. |
P. katsurae growth morphology on β-CMA  Growth morphology at 7 days on β-CMA |
Stain from Port Orford Cedar root disease  Stain from Chamaecyparis lawsoniana root disease on the Smith River |
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P. pinifolia on Pinus radiata  Pinus radiata, note Stem canker associated with necrotic needles. |
P. cambivora oogonium  Bullate oogonium and and two-celled amphigynous antheridium |
P. pseudotsugae paragynous oogonium  P. pseudotsugae oogonium with paragynous antheridia, note the disrupted contents of the abortive oogonia |