Gumming
Mechanical injury
36 host plants
Last updated
Data Maturity Baseline
This profile contains verified disease data from extension databases. Regional field notes and expert review are in progress.
Amber or dark gum oozes from branch crotches or trunks, often following injury or environmental stress that triggers the plant response. This symptom is frequently a defense reaction to canker fungi or bacterial infection at the wound site. Improve overall tree vigor with proper irrigation and care, avoid creating unnecessary pruning wounds, and investigate any underlying disease discovered during inspection.
Control insects and fungus diseases. In large cankers, cut away all dead tissue until a sound surface is exposed.
Quick Reference
Causal Agent
Mechanical injury
Host Plants
36
Management
Cultural Controls
- Control insects and fungus diseases.
- In large cankers, cut away all dead tissue until a sound surface is exposed.
- Treat the wound with a reliable disinfectant.
- Follow cultural practices that produce a firm, stocky, moderate growth rather than a forced growth of soft wood.
- Prevent trunk injury when possible.
- Whitewashing or shielding trunks from the sun can prevent winter injury.
Host Plants (36)
Prunus americana Wild Plum American (Red) Plum August Plum, Goose Plum Prunus armeniaca Apricot Prunus avium Sweet Cherry Prunus besseyi Sand Cherry, Western Sand Cherry Prunus blireiana Blireiana Plum Prunus caroliniana Carolina Cherrylaurel American Cherrylaurel Prunus cascade Prunus cascade Prunus cerasifera Cherry, Plum Prunus cistena Purpleleaf Sandcherry Redleaf Sandcherry Cistena Sandcherry Cistena Plum Prunus dream Prunus dream Prunus emarginata Bitter Cherry, Wild Cherry, Quinine Cherry Prunus first Prunus first Prunus fruticosa Steppe Cherry, European Dwarf Ground Cherry, Mongolian Cherry Prunus glandulosa Dwarf Flowering Almond Prunus ilicifolia Hollyleaf Cherry, Holly-leaved Cherry Prunus laurocerasus Cherry, Laurel Prunus lusitanica Portugal Laurel Prunus maackii Amur Chokecherry Amur Cherry, Manchurian Cherry Prunus mume Japanese Apricotc Japanese Flowering Apricot Japanese Flowering Plum Prunus newport Newport Flowering Plum Prunus okame Okame Flowering Cherry Prunus padus European Birdcherry Common Birdcherry Prunus prostrata Rock Cherry, Mountain Cherry Prunus sargentii Sargent Cherry, Sargent's Cherry Prunus serotina Black Cherry, Rum Cherry Prunus serrula Birchbark Cherry, Paperbark Cherry, Tibetan Cherry Prunus serrulata Japanese Flowering Cherry Prunus snow Prunus snow Prunus subcordata Klamath Plum, Sierra Plum, Pacific Plum Prunus subhirtella Higan Cherry Prunus subhirtella var. autumnalis Autumn Flowering Higan Cherry Prunus tai Prunus tai Prunus virginiana Prunus virginiana Prunus virginiana var. demissa Western Chokecherry Prunus virginiana var. virginiana Common Chokecherry, Eastern Chokecherry Prunus yedoensis Yoshino Cherry, Somei-yoshino Cherry, Tokyo Cherry