Canker on Fagus sp. caused by Phytophthora cactorum.
Photo Gallery
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Phytophthora cactorum canker on beech tree  |
P. pluvialis symptoms on Douglas-fir  Red needle cast symptoms on Douglas-fir in western Oregon, 2015 |
P. megakarya chlamydospore 
Terminal chlamydospore of P. megakarya
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P. cambivora symptoms  Bleeding canker, European beech, OSU campus |
Growth of P. arenaria on half-strength PDA  Colony morphology of Phytophthora arenaria after 7 days at 20°C on half-strength PDA |
P. cambivora disease symptoms  Crown symptoms of Ink disease on sweet chestnut |
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P. lateralis on Port Orford cedar  Typical decline of Chaemacyparis lawsoniana in Landrévarzec, France |
P. cambivora oogonium  Bullate oogonium and and two-celled amphigynous antheridium |
P. ramorum sporangia and chlamydospores  Sporangia and chlamydospores of P. ramorum |
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P. pinifolia on Pinus radiata  Pinus radiata, note grey and collapsed needle bases |
P. katsurae sporangia  Papillate, non-caducous sporangium with differentiated content; photo used with permission from Q-bank |
P. tentaculata sporangium  Papillate sporangium of P. tentaculata with an elongated neck or beak. |