Interior Needle Blight

Interior needles on noble fir yellow and brown before dropping, leaving only current-year growth. Multiple fungi cause this needle cast problem, especially in dense plantings with poor air movement. Provide adequate spacing, weed control, and canopy thinning. Trees look sparse but remain healthy; this is mainly cosmetic.

Remove blighted tissue promptly, cutting well below visible symptoms. Improve air circulation by thinning dense growth. Avoid overhead watering, especially during bloom and new growth periods when tissues are most susceptible. For recurring problems, preventive fungicide applications timed to protect new growth can reduce infection, but cultural controls should be your first approach.