Dieback of Juglans regia caused by Phytophthora cactorum
Photo Gallery
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 |
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. |
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. |
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 |