Oogonium and oospore with amphigynous antheridium
Photo Gallery
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P. pluvialis oogonium and antheridium  |
P. pluvialis colony morphology on carrot agar  Colony morphology on carrot agar at 20 days |
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. |
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P. pluvialis symptoms on Douglas-fir  P. pluvialis symptoms of red needle cast on Douglas-fir, western Oregon 2015 |
P. pluvialis hyphal swellings  P. pluvialis hyphal swellings in water |
P. pluvialis sporangia.  P. pluvialis sporangia on tape peel from infected Douglas-fir needle. |
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P. pluvialis on Pinus radiata needle  Clusters of sporangia emerge from stomata of an infected radiata pine needle. |
P. pluvialis on Pinus radiata in New Zealand  A stand of Pinus radiata trees affected by red needle cast disease. Note the reddish appearance of affected trees prior to needle drop. |
P. pluvialis hyphal swellings  P. pluvialis hyphal swellings on agar |
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P. pluvialis - appearance of new growth  Tufted appearance of new growth from surviving buds on Douglas-fir, one year after defoliation. |
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. 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. |