Crimson Maple with Black Spots and Dying New Growth — Tar Spot Fungus

5-Year-Old Maple: Black Spots on Lower Leaves, Top Growth Dying

Black spots on lower branches + dying new leaves at top = classic tar spot (Rhytisma) fungal disease. Not usually fatal, but weakens tree over time.

Treatment

• Spray Daconil (chlorothalonil) at bud break next spring.
• Repeat 7–10 days later — protects new leaves.
• Rake and destroy all fallen leaves — primary inoculum source.
• If spots appear on new growth, spray again.

Why Top Growth Dies

Severe infection reduces photosynthesis, starving new growth. Fungicide breaks the cycle.

Daconil is widely available at garden centers. Start next spring for clean foliage.