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.
Photo Gallery
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P. pluvialis on Pinus radiata in New Zealand  |
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  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. |
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P. pluvialis oogonium and antheridium  Oogonium and oospore with amphigynous antheridium |
P. pluvialis sporangium  Sporangia showing typical ovoid shape and semi-papillate condition |
P. pluvialis symptoms on Douglas-fir  Red needle cast symptoms on Douglas-fir in western Oregon, 2015 |
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P. pluvialis symptoms on Douglas-fir  Red needle cast symptoms on Douglas-fir in western Oregon, 2015 |
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 colony morphology on carrot agar  Colony morphology on carrot agar at 20 days |
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P. pluvialis hyphal swellings  P. pluvialis hyphal swellings in water |
P. pluvialis symptoms on Douglas-fir  Red needle cast symptoms on Douglas-fir in western Oregon, 2015 |
P. pluvialis symptoms  Symptoms of red needle cast on Douglas-fir needles |