Pinus radiata needles, note “black line” symptom near needle bases
Photo Gallery
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P. pinifolia on Pinus radiata needles  |
P. nicotianae symptoms  Symptoms of gummosis on black wattle (Fitopatol. bras. 2005) |
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. cambivora symptoms  P. cambivora on Fagus sylvatica bole |
P. siskiyouensis colony morphology on V8  Colony morphology on V8 at 14 days |
P. cambivora sporangium  Ovoid non-papillate sporangia with well-rounded base |
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P. pluvialis on Pinus radiata  A Pinus radiata needle showing black resinous bands or marks consistent with the presence of red needle cast disease. |
P. palmivora oogonia  P. palmivora oogonia with antheridia |
Phytophthora cactorum disease symptoms on English walnut  Dieback of Juglans regia caused by Phytophthora cactorum |
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Dying Port Orford Cedar trees  Dead Chamaecyparis lawsoniana trees |
P. cambivora on dead and dying chinquapin  Dead and dying chinquapin infected with P. cambivora |
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). |