Dieback of Juglans regia caused by Phytophthora cactorum
Photo Gallery
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Phytophthora cactorum disease symptoms on English walnut  |
P. kernoviae oogonia  Oogonium with amphigynous antheridia, photo from Q-bank, used with permission |
P. pinifolia sporangium  Cysts remain in sporangium after discharge, photo from Q-bank, used with permission |
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P. pluvialis symptoms on Douglas-fir  Red needle cast symptoms on Douglas-fir in western Oregon, 2015 |
P. kernoviae canker  Bole lesion on Fagus sylvatica |
P. chlamydospora sporangium  Phytophthora chlamydospora sporangium in water. Bar is 20µm. |
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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. chlamydospora chlamydospore  Phytophthora chlamydospora chlamydospore in agar. Bar is 20µm. |
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Basal canker on Port Orford Cedar stump  |
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. megasperma colony morphology on PDA  Colony morphology on PDA at 7 days |