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P. chlamydospora colony morphology on V8 agar

P. chlamydospora colony morphology on V8 agar

P. katsurae disease symptoms

Infected chestnut tree with girdling canker on stem

P. katsurae disease symptoms

Infected chestnut (Castanea) with girdling canker

P. cactorum sporangia

Broadly ovoid, papillate sporangia in water.

P. ramorum canker

Bark discoloration and zone lines in coast live oak (Quercus agrifolia)

P. palmivora sporangia

 

P. palmivora caducous papillate sporangia

 

Phytophthora taxon Agathis bole canker

Canker on a Kauri tree, New Zealand

P. pinifolia coenocytic hyphae

Coenocytic hyphae (from Duran et al. 2008). Scale bar = 20 μm.

P. pseudotsugae sporangium

Broadly ovoid, papillate sporangium in water

P. cactorum oogonium

Oogonium with paragynous antheridia close to oogonial stalk. Oospores are slightly aplerotic.

P. austrocedrae semipapillate sporangium

P. austrocedrae - semipapillate sporangium with off-center attachment.

P. cactorum colony morphology on PDA

Colony morphology on PDA at 14 days

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