Elm Leaf Spot – Now a Widely Spreading Problem
Elm Leaf spot (Phloeospora ulmi) is a fungal disease that affects Weeping, Golden, Horizontal and now English elms. Once the disease is noticed in a tree it will re occur every year spreading to other elms as well.
Treat in Autumn for Optimum Results Next Spring
During late summer and autumn your tree has done most of its growth. Translocation of the insecticides is more even throughout the canopy during this period.