Pinus radiata needles showing colour changes following infection with red needle cast disease. The tissues around the initial infection at the base or along the needle senesce, and change yellow and then brown as indicated by the arrows before the needles cast.
Photo Gallery
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P. pluvialis on Pinus radiata in New Zealand  |
P. kernoviae disease on beech  External lesion; 14 November 2003 |
P. chlamydospora chlamydospore  Phytophthora chlamydospora chlamydospore in agar. Bar is 20µm. |
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P. nicotianae hyphal swelling  P. nicotianae hyphal swellings in water 100x. Photo from Q-bank: www.q-bank.eu, Henk Brouwer (CBS-KNAW, Utrecht, The Netherlands) |
P. siskiyouensis oogonium with amphigynous antheridium  P. siskiyouensis oogonium with amphigynous antheridium |
P. pluvialis sporangia.  P. pluvialis sporangia on tape peel from infected Douglas-fir needle. |
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P. nicotianae sporangia  Noncaducous sporangium showing ovoid shape and papillate condition. (Fitopatol. bras. 2005) |
P. austrocedrae colony morphology on Tomato juice agar with B sitosterol  Colony morphology of P. austrocedrae at 16 ºC after 4 weeks on Tomato juice agar with B sitosterol |
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) |
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P. agathidicida lesion on kauri tree  Gum oozing out of longitudinal lesion |
P. tentaculata disease symptoms on sticky monkey flower  Outplanted sticky monkey flower (Diplacus aurantiacus) infected with P. |
P. pluvialis symptoms on Douglas-fir  Red needle cast symptoms on Douglas-fir in western Oregon, 2015 |