Dieback of Juglans regia caused by Phytophthora cactorum
Photo Gallery
Phytophthora cactorum disease symptoms on English walnut |
P. arenaria disease symptoms on Banksia Dead Banksia sp. in a Kwongan heathland on mineral sand near Eneabba, Western Australia recently killed by root and collar rot caused by Phytophthora arenaria |
P. boehmeriae sporangium Sporangium showing ovoid and ovoid to spherical shape and papillate condition |
P. palmivora sporangia, chlamydospores, hyphae Sporangia (sporangiospores), chlamydospores, and hyphae stained with Cotton Blue |
P. alni in alder forest, Germany, with T. Jung P. alni in alder forest, Germany, with T. Jung |
P. cinnamomi colony morphology on PDA P. cinnamomi colony growth on PDA at 14 days |
P. tentaculata disease symptoms on California mugwort Outplanted California mugwort (Artemisia douglasiana) infected with P. tentaculata, 4.5 years after planting. Plant shows stunting and chlorosis. (P. cryptogea and P. lacustris were also baited from roots/soil of this plant). |
P. kernoviae oogonium Oogonium with amphigynous antheridia, photo from Q-bank, used with permission |
P. agathidicia oogonia Light micrograph of P. agathidicida oospore (Scale bar equals 15 µm) |
P. nicotianae symptoms 2 Symptoms of gummosis on black wattle (Fitopatol. bras. 2005) |
P. arenaria oogonium Aplerotic oogonia of P. arenaria with paragynous antheridia. Scale bar = 20 μm |
P. palmivora symptoms on fruit Brown rot on a lemon fruit caused by Phytophthora palmivora. |