Brand and Common Canker symptoms on Rose

IllustrationBrand and Common Cankers (fungi - Coniothyrium spp.): Plants weakened by other diseases or adverse growing conditions may be more susceptible. Organisms invade stems and cause cankers (dead tissue surrounded by living tissue) to form. These often girdle the stem and tissue past the point of infection is killed. Cankers are light brown in color. Prune infected limbs and twigs being sure to cut well below the diseased tissue. Keep plants free of other diseases.
January, 1995