Mortality of Juglans regia caused by Phytophthora cactorum.
Photo Gallery
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Phytophthora cactorum disease symptoms on English walnut  |
P. lateralis on Port Orford cedar  Small root lesions on Chaemacyparis lawsoniana |
P. tentaculata disease symptoms on California mugwort  Nursery grown California mugwort plant (Artemisia douglasiana) infected with P. tentaculata and exhibiting severe root and crown rot |
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P. chlamydospora chlamydospore  Phytophthora chlamydospora chlamydospore in agar. Bar is 20µm. |
Growth of P. arenaria on half-strength PDA  Colony morphology of Phytophthora arenaria after 7 days at 20°C on half-strength PDA |
Dead and healthy Port-Orford cedar seedlings  Port-Orford-cedar seedlings planted to test for Phytophthora lateralis resistance at the Dorena Genetic Resource Center |
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P. cryptogea hyphal swellings  Cluster of small, angular to globose hyphal swellings formed in water |
P. cinnamomi on Fraser fir  Frasier fir Christmas trees, North Carolina |
P. austrocedrae semipapillate sporangium  P. austrocedrae - semipapillate sporangium with off-center attachment. |
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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. ramorum sporangia  P. ramorum sporangia |
Dead Port Orford Cedar trees  Dead Chamaecyparis lawsoniana trees along road |