Outplanted California mugwort (Artemisia douglasiana) infected with P. tentaculata, 4.5 years after planting. Plant shows stunting and chlorosis. (P. cryptogea and P. lacustris were also baited from roots/soil of this plant).
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P. tentaculata disease symptoms on California mugwort  |
P. tentaculata disease symptoms on California mugwort Outplanted California mugwort (Artemisia douglasiana) infected with P. tentaculata, 4.5 years after planting. Plant shows stunting and chlorosis. (P. cryptogea and P. lacustris were also baited from roots/soil of this plant). |
P. frigida oogonium  Oogonium and oospore with amphigynous antheridium |
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P. palmivora sporangia, chlamydospores, hyphae  Sporangia (sporangiospores), chlamydospores, and hyphae stained with Cotton Blue |
P. megasperma colony morphology on PDA  Colony morphology on PDA at 7 days |
Growth of P. arenaria on CA  Colony morphology of Phytophthora arenaria after 7 days at 20°C on carrot agar |
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P. ramorum colony morphology on V8  P. ramorum colony morphology on V8 |
P. pinifolia on Pinus radiata  Pinus radiata needles, note “black line” symptom near needle bases |
P. alni canker on gray alder  Grey alder (A. incana) with collar rot caused by P. alni |
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P. cryptogea colony morpholgy on PDA  Colony morphology on PDA at 14 days |
Growth of P. arenaria on MEA  Colony morphology of Phytophthora arenaria after 7 days at 20°C on malt extract agar |
P. megasperma colony morphology on V8  Colony morphology on V8 at 7 days |