Aspen Black Blotches: Fungal Leaf Spot Despite Dry Weather

Quaking aspens in dry, hot, fire-prone area have dried leaves with black blotches.

Diagnosis

Fungal leaf spot (e.g., Marssonina) possible even in dry weather.

Treatment

• Spray Daconil fungicide per ornamental label.
• Repeat in 7–10 days.
• Monitor new growth; retreat if spots appear before fall.

Rake fallen leaves to reduce inoculum.