Oogonium with paragynous antheridia close to oogonial stalk. Oospores are slightly aplerotic.
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P. cactorum oogonium  |
P. cactorum sporangia  Broadly ovoid, papillate sporangia in water. |
P. cactorum bleeding canker  Bleeding canker on red oak (Quercus rubra) |
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P. cactorum colony morphology on PDA  Colony morphology on PDA at 14 days |
P. cactorum bleeding canker  Bleeding canker on European beech (Fagus sylvatica) |
P. cactorum sporangium  P. cactorum sporangium |
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P. cactorum sporangia  P. cactorum sporangia |
P. cactorum bleeding canker  Bleeding canker on European beech (Fagus sylvatica) |
Phytophthora cactorum disease symptoms on English walnut  Mortality of Juglans regia caused by Phytophthora cactorum. |
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P. cactorum colony morphology on V8  Colony morphology on V8 at 14 days |
P. cactorum bleeding canker  Bleeding canker on European beech (Fagus sylvatica) |
Phytophthora cactorum disease symptoms on English walnut  Dieback of Juglans regia caused by Phytophthora cactorum |