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Phytophthora alni subsp. alni(PHYTAL)

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All photos included on this page can only be used for educational purposes.
For publication in journals, books or magazines, permission should be obtained from the original photographers with a copy to EPPO.

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Symptom of Phytophthora alni on Alnus incana (Yorkshire Arboretum, GB, 2024)

Courtesy: Camille PICARD (EPPO)

Symptom of Phytophthora alni on Alnus incana (Yorkshire Arboretum, GB, 2024)

Courtesy: Camille PICARD (EPPO)

Alnus glutinosa attacked by Phytophthora × alni

Courtesy: Renaud Ioos, ANSES (FR)

Oogonium

Courtesy: Renaud Ioos, ANSES (FR)

Oogonia

Courtesy: Renaud Ioos, ANSES (FR)

Bleeding cankers on Alnus glutinosa attacked by Phytophthora × alni

Courtesy: Renaud Ioos, ANSES (FR)

Phytophthora alni on Alnus x spaethii

Courtesy: Wietse den Hartog NVWA (NPPO the Netherlands)

Phytophthora alni on Alnus x spaethii

Courtesy: Wietse den Hartog NVWA (NPPO the Netherlands)

Phytophthora alni on Alnus x spaethii

Courtesy: Wietse den Hartog NVWA (NPPO the Netherlands)

Phytophthora alni on Alnus x spaethii

Courtesy: Wietse den Hartog NVWA (NPPO the Netherlands)

Flame-shaped necrosis appearing after removal of the outerbark surrounding bleeding cankers on Alnus glutinosa attacked by Phytophthora × alni

Courtesy: Renaud Ioos, ANSES (FR)

Symptom of Phytophthora alni on Alnus incana (Yorkshire Arboretum, GB, 2024)

Courtesy: Camille PICARD (EPPO)

Symptom of Phytophthora alni on Alnus incana (Yorkshire Arboretum, GB, 2024)

Courtesy: Camille PICARD (EPPO)

Alnus incana tree infected by Phytophthora alni (Yorkshire Arboretum, GB, 2024)

Courtesy: Camille PICARD (EPPO)