Grovesiella Canker

Noble fir develops cankers on limbs, causing branch death. Grovesiella fungal cankers occasionally appear on landscape conifers. Prune out infected branches well below the disease margin and destroy material. In most cases, affected trees remain otherwise healthy and recover with proper pruning care.

Prune out cankered branches at least six inches below visible symptoms, making cuts into healthy wood. Sterilize your tools between cuts. Canker pathogens typically enter through wounds, so minimize pruning injuries and avoid working on trees when bark is wet. Maintain tree vigor through proper watering and avoid stress from drought or compacted soil, which makes trees more susceptible.