Nursery grown California mugwort plant (Artemisia douglasiana) infected with P. tentaculata and exhibiting severe root and crown rot
Photo Gallery
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P. tentaculata disease symptoms on California mugwort  |
P. katsurae disease symptoms  Infected chestnut (Castanea) with bleeding canker |
P. pinifolia on Pinus radiata  Pinus radiata needles, note “black line” symptom near needle bases |
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P. pluvialis symptoms on Douglas-fir  Red needle cast symptoms on Douglas-fir in western Oregon, 2015 |
P. agathidicia sporangia  Differentiation of the cytoplasm within papillate sporangia into acid fuchsin stained zoospores |
P. alni lesion in alder, Illwald, France  P. alni lesion in alder, Illwald, France |
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P. pinifolia hyphal swellings  Spherical hyphal swelling with radiating hyphae (from Duran et al. 2008). Scale bar = 20 μm. |
P. cryptogea colony morpholgy on PDA  Colony morphology on PDA at 14 days |
P. siskiyouensis canker on Italian alder  Phytophthora collar rot on Italian alder trees: an isolated bleeding canker on the trunk |
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P. cactorum bleeding canker  Bleeding canker on red oak (Quercus rubra) |
P. austrocedrae - Mal del ciprés, stages of decline  Colony morphology of P. austrocedrae at 16 C after four weeks on PDA |
P. cambivora colony morphology on MA  Appressed stellate colony morphology at 14 days at 20°C on MA |