Smooth-walled oogonium of P. alni (Swedish variant) with oospore and amphigynous antheridium.
Photo Gallery
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P. alni oogonia  |
Growth of P. megakarya on PDA  Growth of P. megakarya on potato dextrose agar |
Dead and healthy Port-Orford cedar seedlings  Port-Orford-cedar seedlings planted to test for Phytophthora lateralis resistance at the Dorena Genetic Resource Center |
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Mal del ciprés, dead and dying trees along river  Mal del ciprés, dead and dying trees along river |
P. pluvialis symptoms on Douglas-fir  P. pluvialis symptoms of red needle cast on Douglas-fir, western Oregon 2015 |
P. frigida symptoms 3  Black wattle bark with symptoms of gummosis |
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P. cambivora sporangia  Empty sporangia of P. cambivora showing nested internal proliferation |
P. cinnamomi cork oak decline  Cork oak decline, Portugal |
P. katsurae sporangia  Papillate, non-caducous sporangia; photo used with permission from Q-bank |
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P. pseudosyringae sporangia  Ovoid, semipapillate sporangia showing sympodial development of sporangiophore |
P. nemorosa sporangium  Ovoid, semi-papillate sporangium showing medium length pedicel. |
P. tentaculata disease symptoms on California mugwort  Nursery grown California mugwort plant (Artemisia douglasiana) infected with P. tentaculata and exhibiting severe root and crown rot |