BLOG How to Recognize and Treat Common Tree Diseases Mar 28, 2025

Caring for trees is essential for maintaining healthy and beautiful landscapes. However, like all living organisms, trees are susceptible to diseases that can hinder their growth and appearance. As a customer of Bills Tree Service, understanding how to recognize and treat common tree diseases can save you time, money, and the life of your beloved trees.

Tree diseases often manifest in various forms, including discolored leaves, oozing sap, or unusual growths. Recognizing these signs early is the first step. Let’s explore some common tree diseases and how to deal with them effectively.

One of the most prevalent issues is powdery mildew. This disease is identifiable by a white or gray powder on leaves or blossoms. It typically strikes during warm, dry conditions. While powdery mildew is more of a cosmetic issue, affecting the aesthetics rather than the health of the tree, it can still cause stress to your plants over time. Managing powdery mildew involves improving air circulation by pruning overcrowded branches and applying fungicidal treatments as needed.

Another serious concern is Dutch elm disease. Recognized by wilting yellow leaves, typically on one side of the tree, it’s crucial to catch this disease early. This fungal disease spreads rapidly through beetle vectors and root grafts between trees. Treatment requires prompt action by removing affected branches and possibly applying fungicides. More extensively infected trees may need professional removal to prevent spreading.

Oak wilt is a deadly disease that affects oak trees, noticeable by wilting, browning leaves, and branch dieback. This disease spreads through root systems and by beetles attracted to fresh tree wounds. Preventative maintenance includes avoiding pruning during the active beetle season, March through September, and ensuring any pruning wounds are promptly sealed.

Anthracnose is a group of diseases resulting in dark, sunken lesions on leaves, stems, and flowers. It particularly affects sycamores, dogwoods, and oaks, causing premature leaf drop but is rarely fatal. The best management strategy is clearing away fallen leaves and applying appropriate fungicide sprays during the initial budding phase in spring.

Emerald ash borer is an invasive insect pest, creating D-shaped exit holes in the bark, usually leading to the death of an ash tree. Infestation signs include thinning canopies, splitting bark, and increased woodpecker activity. Early detection and insecticidal treatments are crucial for saving affected trees.

Preventative care is often the best strategy for managing tree health. Regular tree inspections by a professional tree service like Bills Tree Service can identify potential problems before they escalate. Ensuring your trees are correctly pruned and maintained encourages healthy growth and resilience against diseases.

Remember, each tree species and surrounding environment can react differently to diseases. When in doubt, consult with tree care experts who can provide tailored advice and solutions. At Bills Tree Service, we are committed to helping our clients maintain the health and beauty of their landscapes, offering comprehensive inspections, disease treatments, and ongoing tree care solutions.

By recognizing and addressing common tree diseases early, you contribute to the longevity and vitality of the trees in your care. A proactive approach not only preserves the health of your trees but enhances the beauty and value of your entire property. For expert assistance and peace of mind, trust Bills Tree Service to keep your trees thriving.