When should I Call an Arborist for a Diseased Tree?

You should call an arborist for a diseased tree when you notice specific symptoms or reach certain "professional thresholds" during your seasonal inspections. Early intervention is critical to prevent a treatable condition from becoming a total loss.

According to Miller Tree Service, you should contact a professional arborist immediately if you observe the following:

• Oak Wilt (Spring/Summer): If more than 10% of the tree’s canopy is affected by wilting or bronzing leaves, or if you find fungal mats at the root collar.
• Bacterial Leaf Scorch (Summer): If marginal leaf browning or wilting begins to spread to new sections of the tree.
• Hypoxylon Canker (Fall): If you see crusty white or grayish fungal fruiting bodies (conks) on the trunk or branches that are actively enlarging.
• Pine Bark Beetle (Winter): If you discover live beetles, boring dust, or "pitch tubes" (small resin balls) actively forming on the trunk.

In general, you should seek a professional assessment if your tree shows symptoms such as rapid leaf discoloration, unusual fungal growths, bark shedding, or crown dieback. Because symptoms of disease often mimic drought stress or construction damage, a certified arborist is needed to provide an accurate diagnosis and a customized treatment plan, such as fungicide injections or root trenching.