Disease name: Anthracnose of shade trees
Pathogen name: Several species of fungi
Hosts: Numerous species of trees. Hosts vary by the species of fungus.
One of the most common and unsightly diseases of shade trees is anthracnose. Anthracnose is actually a group of foliar diseases caused by several species of fungi, in a number of genera including Discula, Apiognomonia, Gloeosporium and Colletotrichum. The spores of these fungi infect newly emerging leaves. The disease, which becomes active in spring, can become severe when cool, wet spring weather persists. Anthracnose can be very unsightly, but in most cases is not serious. Anthracnose of sycamore may do more damage and may warrant treatment.