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P. siskiyouensis canker on Italian alder

Bleeding canker at the base of a tree and a sprinkler emitter (arrow) adjacent to the trunk

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. pluvialis oogonium and antheridium

Oogonium and oospore with amphigynous antheridium

P. palmivora chlamydospore

Terminal chlamydospore of P. palmivora

P. kernoviae colony morphology on CMA PARPH

Organism grown on CMA PARP[H]; Plant disease 70, 1038-1043

P. tentaculata chlamydospore

Terminal chlamydospore of P. tentaculata

P. pluvialis hyphal swellings

P. pluvialis hyphal swellings on agar

P. pseudotsugae paragynous oogonium

 P. pseudotsugae oogonium with paragynous antheridia, note the disrupted contents of the abortive oogonia

Vehicle washing

Truck washing to avoid spread of P. lateralis

P. siskiyouensis canker on Italian alder

Bole lesions in the tissues under the bark of a bleeding canker: distinct margin between healthy and disease tissues

P. tentaculata sporangium

Papillate sporangium of P. tentaculata with an elongated neck or beak.

P. kernoviae disease on European beech

Bleeding lesion on trunk of Fagus sylvatica

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