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  |
P. cactorum oogonium  Oogonium with paragynous antheridia close to oogonial stalk. Oospores are slightly aplerotic. |
P. katsurae disease symptoms  Infected chestnut tree with girdling canker on stem |
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P. alni lesion in alder, Illwald, France  P. alni lesion in alder, Illwald, France |
P. kernoviae leaf wilt  Wilted leaf of infected rhododendron |
P. cactorum sporangia  Broadly ovoid, papillate sporangia in water. |
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P. ramorum on larch in the United Kingdom  Larch trees with P. ramorum in the UK |
P. nicotianae hyphal swelling  P. nicotianae hyphal swellings in water 100x. Photo from Q-bank: www.q-bank.eu, Henk Brouwer (CBS-KNAW, Utrecht, The Netherlands) |
P. pluvialis oogonium and antheridium  Oogonium and oospore with amphigynous antheridium |
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P. pseudosyringae colony morphology on PDA  Colony morphology on PDA at 14 days |
P. siskiyouensis sporangia  Sporangia showing a variety of shapes and orientations of semi-papillae and sporangiophores |
P. austrocedrae colony morphology on Tomato juice agar with B sitosterol  Colony morphology of P. austrocedrae at 16 ºC after 4 weeks on Tomato juice agar with B sitosterol |