Papillate, non-caducous sporangia; photo used with permission from Q-bank
Photo Gallery
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P. katsurae sporangia  |
P. pinifolia on Pinus radiata  Pinus radiata, note Infected needles at right angles to stem |
P. arenaria sporangia  Globose papillate sporangia of Phytophthora arenaria on V8 agar flooded with soil extract. (Scale bar = 20 μm) |
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P. cambivora on dead and dying chinquapin  Dead and dying chinquapin infected with P. cambivora |
P. chlamydospora chlamydospore  Phytophthora chlamydospora chlamydospore in agar. Bar is 20µm. |
P. austrocedrae - Mal del ciprés, stages of decline  Colony morphology of P. austrocedrae at 16 C after four weeks on PDA |
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P. austrocedrae colony morphology on Tomato juice agar with B sitosterol  Colony morphology of P. austrocedrae at 16 ºC after 4 weeks on Tomato juice agar with B sitosterol |
P. siskiyouensis disease symptoms on Italian alder  Phytophthora collar rot on Italian alder trees: standing, dead tree |
P. pinifolia hyphal growth  P. pinifolia pathogen growing from infected needle on selective agar |
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P. palmivora colony morphology on V8  Growth of P. palmivora on V8 agar |
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 |
P. alni canker on gray alder  Grey alder (A. incana) with collar rot caused by P. alni |