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
Photo Gallery
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P. arenaria disease symptoms on Banksia landscape  |
P. pinifolia on Pinus radiata  Pinus radiata, note Infected needles at right angles to stem |
P. tentaculata sporangium  Papillate sporangium of P. tentaculata |
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P. megakarya sporangia (photo from Q-bank, used with permission).  P. megakarya sporangia |
P. alni oogonium  Bullate oogonium of P. alni (German variant) with oospore and amphigynous antheridium. |
P. cambivora oogonium  P. cambivora oogonium with antheridium |
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P. austrocedrae - sporangia  Sporangium with distorted shape, photo from Q-bank, used with permission. |
P. megasperma sporangia  Ovoid, non-papillate sporangia showing internal proliferation of sporangiophore |
P. alni oogonia subspecies and variants  Fig. 40. P. alni subsp. uniformis. Fig. 41. P. alni subsp. multiformis German variant. Fig. 42. P. alni subsp. alni. Fig. 43. |
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P. agathidicia sporangia  Differentiation of the cytoplasm within papillate sporangia into acid fuchsin stained zoospores |
P. cinnamomi cork oak decline  Red oak with embedded lesions, France |
P. austrocedrae - Mal del ciprés in Argentina  Mal del ciprés looking toward Rio Grande, Chubut Province, Argentina |