What can be done for a birch that has leaves with bumps and turning black? - Cooperative Extension: Garden and Yard - University of Maine Cooperative Extension

Question: My question is about a Fox Valley Dwarf River Birch. In 2021, we noticed bumps on the leaves. We went to nursery and it was suggested we use a systemic product which we did. Bumps remained but the tree continued to thrive. This year, the bumps came back immediately. We again asked from the read more