Oogonium with paragynous antheridia close to oogonial stalk. Oospores are slightly aplerotic.
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P. cactorum oogonium  |
P. pinifolia hyphal growth  P. pinifolia pathogen growing from infected needle on selective agar |
Dead and healthy Port-Orford cedar trees  Chamaecyparis lawsoniana trees |
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Boot wash to station to control spread of P. agathidicida  Use of hypochlorite solution applied through a “livestock drench-gun”, integrated with a soil grate to allow potentially contaminated soil to be collected |
P. cambivora oogonium  Bullate oogonium and and two-celled amphigynous antheridium |
P. kernoviae leaf wilt  Wilted leaf of infected rhododendron |
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P. siskiyouensis disease symptoms on Italian alder  Phytophthora collar rot on Italian alder trees: standing, dead tree |
P. ramorum bleeding canker  Bark cracks with black ooze in coast live oak, a symptom of P. ramorum canker. |
P. pinifolia sporangia  Non- papillate and caducous sporangia of Phytophthora pinifolia isolated from the infected P. radiata needles. |
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P. kernoviae disease on beech  External lesion; 14 November 2003 |
P. agathidicida lesion on kauri tree  Gum oozing out of longitudinal lesion |
P. austrocedrae - necrotic lesion in phloem  |