Leaf Gall
Abiotic or fungal
40 host plants
Last updated
This profile contains verified disease data from extension databases. Regional field notes and expert review are in progress.
Abnormal puckered or bulging growths form on leaves, caused by fungi or midge insects that create deformities affecting appearance. Most galls are purely cosmetic and don't threaten overall plant health or survival. Severe infections may benefit from pruning affected shoots to improve aesthetic appearance and reduce pest or disease inoculum for the next season.
Galls are abnormal growths triggered by the pathogen and cannot be reversed once formed. Prune out galled tissue when practical, cutting well below the affected area. Avoid wounding plants during maintenance, as many gall-forming organisms enter through fresh injuries. For severe or recurring gall problems, consider whether the species is well-suited to the site conditions, as stressed plants tend to be more susceptible.
Quick Reference
Management
Cultural Controls
- Aggressive scouting for and removal of cankers is the key to long term control. Whole tree removal is recommended in British Columbia nurseries when cankers are found. Establish new plantings with clean stock free of visible cankers. Locate new orchards as far as possible from older orchards that may have existing cankers. Scout new orchards for the disease, because early detection will aid in ove