Symptoms of red needle cast on Douglas-fir needles
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P. pluvialis symptoms on Douglas-fir needles |
P. arenaria oogonium Aplerotic oogonia of P. arenaria with paragynous antheridia. Scale bar = 20 μm |
P. cinnamomi sporangium P. cinnamomi sporangium |
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P. ramorum chlamydospores P. ramorum chlamydospores |
P. pinifolia colony morphology on PDA Colony pattern after 7 days on PDA at 24C, photo from Q-bank, used with permission. |
P. pluvialis on Pinus radiata in New Zealand A stand of Pinus radiata trees affected by red needle cast disease. Note that frequently only the lower part of the crown is affected. |
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P. nemorosa colony morphology on V8 Colony morphology on V8 at 14 days |
P. lateralis on Port Orford cedar Small root lesions on Chaemacyparis lawsoniana |
P. pinifolia coenocytic hyphae Coenocytic hyphae (from Duran et al. 2008). Scale bar = 20 μm. |
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P. nicotianae colony morphology on PDA Phytophthora nicotianae CBS 321.49 PDA after 7 days at 24 degrees. Photo from Q-bank: www.q-bank.eu, Henk Brouwer (CBS-KNAW, Utrecht, The Netherlands) |
P. arenaria sporangia Globose papillate sporangia of Phytophthora arenaria on V8 agar flooded with soil extract. (Scale bar = 20 μm) |
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). |


