Maple Decline: Collar Rot and Basal Canker Complex
Author(s) M. F. Heimann, G. L. Worf, J. E. Kuntz, M. J. Drilias
Research has demonstrated that many of Wisconsin sugar maples are declining because of fungal invasion of the root and/or lower trunk known as collar rot and basal canker complex. Trees of any age appear susceptible, and as many as 80% of the maples in some locations have been observed with indications of maple decline. This publication summarizes research results, describes the collar rot and basal canker complex, and offers suggestions for effective means of control (4 pages).