Oogonium with paragynous antheridia close to oogonial stalk. Oospores are slightly aplerotic.
Photo Gallery
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P. cactorum oogonium  |
P. nemorosa sporangia  Ovoid, semi-papillate sporangia showing sympodial development of sporangiophore |
P. chlamydospora chlamydospore  Phytophthora chlamydospora chlamydospore in agar. Bar is 20µm. |
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P. cactorum bleeding canker  Bleeding canker on European beech (Fagus sylvatica) |
P. cambivora coralloid hyphae  Coralloid hyphae with hyphal swelling-like structures |
P. lateralis on Port Orford cedar  Typical decline of Chaemacyparis lawsoniana in Landrévarzec, France |
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P. cryptogea sporangium  Ovoid non-papillate sporangia in water. |
Mat to control spread of P. agathidicida  Jogger running over a plastic-reinforced, foam-mat containing a 2% solution of Trigene™ Advance (quaternary ammonium compound) as part of a cross-country event, in the Waitakere Regional Park |
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. |
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P. nicotianae oogonia  P. nicotianae oogonia 100x. Photo from Q-bank: www.q-bank.eu, Henk Brouwer (CBS-KNAW, Utrecht, The Netherlands) |
P. lateralis on Port Orford cedar  Small root lesions on Chaemacyparis lawsoniana |
P. agathidicia oogonia  P. agathidicida oogonia with SEM (top) and light microscopy (bottom) |