Oogonium and oospore with amphigynous antheridium
Photo Gallery
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P. pluvialis oogonium and antheridium  |
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. |
P. pluvialis hyphal swellings  P. pluvialis hyphal swellings in water |
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P. pluvialis sporangium  Sporangia showing typical ovoid shape and semi-papillate condition |
P. pluvialis hyphal swellings  P. pluvialis hyphal swellings on agar |
P. pluvialis on Pinus radiata needle  Clusters of sporangia emerge from stomata of an infected radiata pine needle. |
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P. pluvialis sporangia.  P. pluvialis sporangia on tape peel from infected Douglas-fir needle. |
P. pluvialis colony morphology on carrot agar  Colony morphology on carrot agar at 20 days |
P. pluvialis symptoms on Douglas-fir needles  Symptoms of red needle cast on Douglas-fir needles |
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P. pluvialis symptoms  Symptoms of red needle cast on Douglas-fir needles |
P. pluvialis sporangium  Sporangium showing typical ovoid shape and semi-papillate condition |
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. |