P. nicotianae hyphal swellings in water 100x. Photo from Q-bank: www.q-bank.eu, Henk Brouwer (CBS-KNAW, Utrecht, The Netherlands)
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P. nicotianae hyphal swelling |
P. lateralis on Port Orford cedar Localized branch infection of Chaemacyparis lawsoniana in Lopérec, France |
P. cinnamomi hyphal swelling P. cinnamomi hyphal swelling (or thin walled chlamydospores) |
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P. cinnamomi on Fraser fir Frasier fir Christmas trees, North Carolina |
Austrocedrus associated with Mal del ciprés. Austrocedrus with basal resin flow associated with Mal del ciprés. |
P. arenaria disease symptoms on Banksia Dead Banksia sp. in a Kwongan heathland on mineral sand near Eneabba, Western Australia recently killed by root and collar rot caused by Phytophthora arenaria |
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P. siskiyouensis sporangium P. siskiyouensis sporangium with lateral semi-papilla and subterminal, sub-basal insertion in the sporangiophore |
P. cactorum oogonium Oogonium with paragynous antheridia close to oogonial stalk. Oospores are slightly aplerotic. |
P. alni oogonia Smooth-walled oogonium of P. alni (Swedish variant) with oospore and amphigynous antheridium. |
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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. pinifolia on Pinus radiata needles Pinus radiata needles, note “black line” symptom near needle bases |
P. cactorum sporangia Broadly ovoid, papillate sporangia in water. |


