A Pinus radiata needle showing faded olive- or khaki- coloured lesions consistent with the presence of red needle cast disease. Arrow shows resinous bands within the extended olive lesion.
Photo Gallery
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P. pluvialis on Pinus radiata in New Zealand  |
P. pluvialis on Pinus radiata in New Zealand  Typical red needle cast symptoms along a twig. Lesions begin at the base of the needle which subsequently turns brown and is cast from the twig. |
P. ramorum leaf symptoms on tan oak  Tip symptoms on tanoak seedling (Notholithocarpus densiflorus). |
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P. frigida sporangia  Noncaducous sporangia showing ovoid shape and papillate condition |
P. pluvialis on Pinus radiata in New Zealand  Lesions consistent with the presence of red needle cast disease are more abundant at the base of Pinus radiata needles as indicated by the arrow. |
P. katsurae disease symptoms  Infected chestnut (Castanea) with girdling canker |
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P. siskiyouensis oogonium with amphigynous antheridium  P. siskiyouensis oogonium with amphigynous antheridium |
P. pseudotsugae sporangium  Broadly ovoid, papillate sporangium in water |
P. arenaria sporangia  Globose papillate sporangia of Phytophthora arenaria on V8 agar flooded with soil extract. (Scale bar = 20 μm) |
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P. pinifolia on Pinus radiata  Pinus radiata, note Stem canker associated with necrotic needles. |
P. cactorum sporangia  P. cactorum sporangia |
P. kernoviae leaf wilt  Necrosis of rhododendron leaves. |