Bronze Leaf Diseaseby mrgadmin on April 22, 2023

Bronze leaf is an air borne fungal disease that infects Swedish columnar aspens and tower poplars in Calgary areas. Symptoms of bronze leaf disease typically appear in late summer or early fall and may only be on a few branches or leaves. Infected leaves become dark reddish-brown, chocolate brown or bronze although the veins and the leaf stem may remain green for some time. Infected leaves remain on the tree throughout winter.