Photo Gallery

Phytophthora cactorum disease symptoms on English walnut Dieback of Juglans regia caused by Phytophthora cactorum	P. cambivora oogonium P. cambivora oogonium with antheridium	P. cactorum bleeding canker Bleeding canker on red oak (Quercus rubra)
Tāne Mahuta “Lord of the Forest” kauri tree Tāne Mahuta “Lord of the Forest” is a giant kauri tree (approximately 47 metres in height) in the Waipoua Forest of Northland Region, New Zealand. Its age is unknown but is estimated to be between 1,250 and 2,500 years	P. agathidicida oospores Oospores of P. agathidicida in the roots of kauri seedlings inoculated with P. agathidicida. The root has been cleared with potassium hydroxide and bleached with peroxide, before being stained with Trypan Blue	P. siskiyouensis disease symptoms on Italian alder Phytophthora collar rot on Italian alder trees: standing, dead tree
P. siskiyouensis oogonium with amphigynous antheridium P. siskiyouensis oogonium with amphigynous antheridium	P. cambivora disease symptoms Dead and dying chinquapin infected with P. cambivora	P. frigida chlamydospore Globose chlamydospores of P. frigida
P. tentaculata sporangium Papillate sporangium of P. tentaculata	P. cinnamomi sporangium P. cinnamomi sporangium	P. pseudosyringae sporangium Ovoid, semipapillate sporangia showing medium length pedicel