Informational table showing disease name, symptoms, pathogen/cause, and management of Redbud diseases. Disease Symptoms Pathogen/Cause Management Dieback and canker Leaves wilt and die as branches are slowly killed. Small, sunken cankers slowly increase in size. The wood beneath the canker is discolored. Trees cankered near the base will die. Botryosphaeria Prune infected branches well below the canker. Remove severely infected trees. Protect trees from drought stress and winter injury.