P. chlamydospora colony morphology on V8 agar
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P. chlamydospora colony morphology on V8 agar  |
P. megasperma oogonium  Oogonium with paragynous antheridia applied close to the ogonial stalk. |
Sporangia showing ovoid and ovoid to spherical shape and papillate condition sporangia  Sporangia showing ovoid and ovoid to spherical shape and papillate condition |
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P. pluvialis sporangium  Sporangia showing typical ovoid shape and semi-papillate condition |
Growth of P. arenaria on V8  Colony morphology of Phytophthora arenaria after 7 days at 20°C on V8 agar |
P. pinifolia on Pinus radiata  Pinus radiata, note grey and collapsed needle bases |
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P. pinifolia sporangia  Non- papillate and caducous sporangia of Phytophthora pinifolia isolated from the infected P. radiata needles. |
P. pseudotsugae amphigynous oogonium  P. pseudotsugae oogonium with amphigynous antheridia |
P. cactorum bleeding canker  Bleeding canker on European beech (Fagus sylvatica) |
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P. cambivora disease symptoms  Ink disease impact in sweet chestnut forest in Italy |
P. cinnamomi hyphal swellings  P. cinnamomi hyphal swellings (or thin walled chlamydospores) |
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). |