Necrosis of rhododendron leaves.
Photo Gallery
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P. kernoviae leaf wilt  |
P. agathidicia sporangia  Differentiation of the cytoplasm within papillate sporangia into acid fuchsin stained zoospores |
P. ramorum colony morphology on PDA  P. ramorum colony morphology on PDA |
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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. kernoviae canker  Bole lesion on Fagus sylvatica |
P. ramorum sporangium  P. ramorum sporangium |
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Healthy Port Orford Cedar tree  Healthy Chamaecyparis lawsoniana tree |
P. siskiyouensis disease symptoms on Italian alder  Phytophthora collar rot on Italian alder trees: standing, dead tree |
P. tentaculata on V-8 media  Culture of P. tentaculata on V-8 media |
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P. pseudotsugae sporangia  Broadly ovoid, papillate sporangia in water |
P. cinnamomi sporangium  P. cinnamomi sporangium |
P. nicotianae oogonia  P. nicotianae oogonia 100x. Photo from Q-bank: www.q-bank.eu, Henk Brouwer (CBS-KNAW, Utrecht, The Netherlands) |