Common problems we see in Champaign County
• Emerald ash borer: thinning ash canopies, D-shaped holes, bark splits. Many ash trees can still be saved if treated before they lose too much canopy.
• Oak wilt: oak leaves turning brown from the edges in summer. It spreads, so it needs fast attention.
• Scale, mites and aphids: sticky leaves, black sooty mold, speckled or curling leaves.
• Leaf diseases: spots, blotches and early leaf drop, often after a wet spring.
• Stress and decline: poor soil, root damage from construction, drought or girdling roots.