Oogonium with paragynous antheridia applied close to the ogonial stalk.
Photo Gallery
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P. megasperma oogonium  |
P. arenaria disease symptoms on Banksia  Dead Banksia sp. in a Kwongan heathland on mineral sand near Eneabba, Western Australia recently killed by root and collar rot caused by Phytophthora arenaria |
P. pinifolia on Pinus radiata  Pinus radiata needles, note “black line” symptom near needle bases |
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P. cambivora older hyphae  Old septate hyphae |
P. cryptogea sporangium  Obpyriform non-papillate sporangia in water |
P. kernoviae leaf wilt  Necrosis of rhododendron leaves. |
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P. tentaculata chlamydospore  P. tentaculata chlamydospore with short hyphal projection |
P. pluvialis sporangium  Sporangia showing typical ovoid shape and semi-papillate condition |
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. kernoviae leaf wilt  Wilted leaf of infected rhododendron |
Comparative gametangial morphology of Phytophthora Clade 5 species  Comparative gametangial morphology of Phytophthora Clade 5 species, with SEM (top) and light microscopy (bottom). P. heveae has smooth walled oogonia with funnel-shaped, amphigynous antheridia. P. agathidicida has mildly stipulate oogonia with globose amphigynous antheridia. P.cocois has mildly bullate oogonia with reflexed amphigynous antheridia. P. castaneae has coarsely bullate oogonium with rugose protuberances and narrow amphigynous antheridia (Weir et al. 2015). |
P. frigida symptoms 2  Symptoms of gummosis on black wattle |