Typical ovoid papillate sporangia of Phytophthora arenaria on V8 agar flooded with soil extract
Photo Gallery
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P. arenaria sporangia  |
P. boehmeriae oogonium  Oogonia and oospores with amphigynous antheridia |
P. pseudosyringae sporangia  Ovoid, semipapillate sporangia showing sympodial development of sporangiophore |
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P. siskiyouensis bleeding canker  Close-up of margin area of bole lesions under the bark of a bleeding canker |
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. kernoviae colony morphology on V8  Colony morphology at 7 days at 18°C on V8, photo from Q-bank, used with permission. |
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P. agathidicida lesion on kauri tree  Advancing triangular lesion extending up the trunk of an 80 cm DBH kauri tree in the Huia Dam Site along Twin Peaks Track, Waitakere Regional Park |
P. frigida symptoms 1  Symptoms of gummosis on black wattle |
Growth of P. megakarya on corn meal agar
 Growth of P. megakarya on corn meal agar |
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P. agathidicia sporangia  Differentiation of the cytoplasm within papillate sporangia into acid fuchsin stained zoospores |
P. agathidicida lesion on kauri tree  Gum oozing out of longitudinal lesion |
P. pinifolia on Pinus radiata  Pinus radiata needles, note “black line” symptom near needle bases |