Leaf scorch, sometimes called marginal leaf burn, describes the death of tissue along the edge of the leaf. BLS can occur for a variety of reasons:

Insufficient moisture in the soil

• Water loss happens rapidly, not allowing for adequate replenishment
• Roots killed by plant pathogens, excavation, or compaction
• Fungi/bacteria invade, stifling the water conducting vessels in the plant

In our neck of the woods, BLS is most readily seen in Oaks, but it’s also regularly seen in Red Maples, Elms, Sycamores, London Planes, Mulberries, and Dogwoods.