Photo Gallery

P. siskiyouensis disease symptoms on Italian alder Phytophthora collar rot on Italian alder trees: standing, dead tree	P. siskiyouensis bleeding canker Close-up of margin area of bole lesions under the bark of a bleeding canker	P. siskiyouensis bleeding canker Bole lesions in the tissues under the bark of a bleeding canker: discoloration in the secondary phloem tissue
P. siskiyouensis colony morphology on V8 Colony morphology on V8 at 14 days	P. siskiyouensis disease symptoms on Italian alder Grove of dying trees in a commercial landscape in Foster City, CA	P. siskiyouensis sporangia Sporangia showing a variety of shapes and orientations of semi-papillae and sporangiophores
P. siskiyouensis oogonium with amphigynous antheridium P. siskiyouensis oogonium with amphigynous antheridium	P. siskiyouensis sporangium P. siskiyouensis sporangium with lateral semi-papilla and subterminal, sub-basal insertion in the sporangiophore	P. siskiyouensis oogonium with paragynous antheridium P. siskiyouensis oogonium with paragynous antheridium
P. siskiyouensis canker on Italian alder Bleeding canker at the base of a tree and a sprinkler emitter (arrow) adjacent to the trunk	P. siskiyouensis canker on Italian alder Phytophthora collar rot on Italian alder trees: an isolated bleeding canker on the trunk	P. siskiyouensis colony morphology on PDA Colony morphology on PDA at 14 days