This is an information by Dr. rer. silv. Thomas Jung expert for Phytophthora, forest and tree diseases and nurseries
http://www.tree-diseases.com

Diagnosis | Tree assessment | Control | Phytophthora Consulting

Phytophthora Picture Gallery - Alder dieback

Alder 17: Riparian common alder (A. glutinosa) stool with multiple stems showing different stages of infection by P. alni.

Picture 17 of 24