The disease also can increase susceptibility to other disease or insect problems in areas where trees are attacked year after year. Several cultural practices can reduce the severity of anthracnose. Remove dead leaves in the fall to help limit the amount of fungal inoculum present for infection of new leaves the following spring. This practice really eliminates the problem, especially for those anthracnose fungi that may also survive in blighted twigs on the tree. Proper tree spacing and placement to promote good air circulation reduces the number of hours leaf surfaces remain wet, and decreases the likelihood of fungal infection.
Many trees recover rapidly from anthracnose if they are maintained in a vigorous condition.
Water and fertilize trees regularly. Nitrogen fertilization may increase the tree's tolerance or resistance to anthracnose, but avoid overfertilization. Chemical sprays normally are not necessary to control anthracnose except on those trees that have had a history of the problem. Several fungicides are labeled for anthracnose diseases including thiophanate and Bordeaux or other coppers. Thorough coverage and proper timing of the sprays are essential for adequate control.