Haque, M.M., Martínez-Alvárez, P., Lomba, J.M., Martín-García, J. & Diez, J.J. (2014) - First Report of Phytophthora plurivora Causing Collar Rot on Common Alder in Spain - Plant Disease Journal
Phytophthora decline of riparian alder (Alnus spp.) has been reported in several European countries (2). Death of common alder (Alnus glutinosa) due to Phytophthora alni has also been reported in Spain (4).