Pests & Diseases
Heads up: this is an independent, unofficial information guide — not the Association’s official website. Details (membership, events, directory, contacts) change and may be out of date or incomplete here. Always confirm current information with the St. Louis Arborist Association directly.
Catching problems early can save a tree. This is general awareness information — an arborist can diagnose what’s actually going on.
Signs worth noticing
- Unusual leaf loss, discoloration, or wilting
- Dead branches or thinning canopy
- Holes, sawdust, or visible insects
- Fungal growth, cankers, or oozing
Many issues look alike and some spread quickly, so professional diagnosis matters. A certified arborist can identify the cause and recommend appropriate, responsible options.