Mortality of Juglans regia caused by Phytophthora cactorum.
Photo Gallery
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Phytophthora cactorum disease symptoms on English walnut  |
P. pseudosyringae oogonium  Oogonium with paragynous antheridium in agar |
P. frigida sporangia  Noncaducous sporangia showing ovoid shape and papillate condition |
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P. tentaculata hyphae  Looping hyphae commonly seen with P. tentaculata on PARP media |
Growth of P. arenaria on V8  Colony morphology of Phytophthora arenaria after 7 days at 20°C on V8 agar |
Vehicle washing  Truck washing to avoid spread of P. lateralis |
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P. siskiyouensis oogonium with amphigynous antheridium  P. siskiyouensis oogonium with amphigynous antheridium |
Port Orford Cedar Hedge row  Chamaecyparis lawsoniana residential hedge row with alive and dead trees |
P. pinifolia on Pinus radiata  Pinus radiata, note Infected needles at right angles to stem |
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P. kernoviae sporangium  Papillate and caducous sporangium, photo from Q-bank, used with permission |
P. pinifolia hyphal growth  P. pinifolia pathogen growing from infected needle on selective agar |
P. megakarya sporangia (photo from Q-bank, used with permission).  P. megakarya sporangia |