Gumming (Gummosis)

Gum oozes from prunus trunks and branches in response to stress, frost damage, or canker infection. Gummosis itself is not a disease but a plant response to injury and stress. Provide proper culture with steady moisture and moderate fertilizer, avoid over-fertilization, and prune out disease cankers. Healthy trees resist problems.

Manage gumming (gummosis) by breaking the disease cycle at the points you can control: remove infected tissue and debris, reduce moisture on susceptible foliage, and maintain plant health through proper watering and fertilization. Healthy, well-sited plants resist infection more effectively than stressed ones, so addressing underlying site conditions often solves the problem better than repeated chemical applications.