Symptoms of red needle cast on Douglas-fir needles
Photo Gallery
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P. pluvialis symptoms on Douglas-fir needles  |
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. siskiyouensis disease symptoms on Italian alder  Grove of dying trees in a commercial landscape in Foster City, CA |
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P. pluvialis on Pinus radiata in New Zealand  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. |
P. pluvialis colony morphology on carrot agar  Colony morphology on carrot agar at 20 days |
P. cactorum sporangia  Broadly ovoid, papillate sporangia in water. |
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Growth of P. megakarya on V8 agar  Growth of P. megakarya on V8 agar |
Growth of P. palmivora on CMA  Growth of P. palmivora on corn meal agar |
P. tentaculata chlamydospore  Terminal chlamydospore of P. tentaculata |
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P. chlamydospora hyphal swellings  Phytophthora chlamydospora chlamydospore in agar. Bar is 20µm.
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P. pinifolia sporulation  Sporulation on edge of hemp seed, photo from Q-bank, used with permission. |
P. cactorum bleeding canker  Bleeding canker on European beech (Fagus sylvatica) |