Elm Tree Deformed Leaf Wads and Projections: Unknown Fungal Outbreak

Symptoms: Wads and Worm-Like Projections

Baseball-sized white wads of deformed leaves + green ½-inch leaf projections suggest a severe fungal or gall-making outbreak, possibly exacerbated by cool, wet spring. Exact ID requires lab diagnosis.

Why Uncertain

• Multiple pathogens can cause similar distortions.
• Projections could be fungal hyphae, gall tissue, or viral symptoms.
• Photos help but microscopy often needed.

Recommended Actions

• Submit sample to county extension for lab ID (free/low cost).
• Rake and destroy fallen deformed leaves to reduce inoculum.
• Apply preventive fungicide on new growth if wet weather continues.
• Hope for summer heat—many foliar fungi decline in hot, dry conditions.

Don't Panic

Elms are resilient. Even severe spring outbreaks often don't kill mature trees.