Diagnosis
Diagnosis
Work out what is wrong before spending on a treatment.
Tree Disease and Pest Diagnosis in Frankfort, KY
Most declining trees we are called to look at in Franklin County do not have a disease. They have an injury, a site problem, or a planting mistake — and no spray addresses any of those. Diagnosis first is the difference between fixing a tree and funding a treatment programme that cannot work.
Start at the root flare
The base of the trunk answers a surprising share of tree questions. A healthy tree flares outward where it meets the ground. If yours goes into the soil straight, like a post, it is either planted too deep or buried by grade change and mulch — and that alone will kill a tree slowly over a decade.
Girdling roots, where a root circles the stem and strangles it, show at the same place. Both are correctable if caught, and neither responds to anything sprayed on the leaves.
Injuries that look like illness
- Planted too deep, or mulch piled against the trunk
- String trimmer and mower damage around the base
- Soil compaction and root severing from construction
- Grade changes that buried or exposed the root zone
- Drought stress on a shallow-soil site
- Salt exposure near a treated drive or roadway
Actual pests and diseases we see in Franklin County
When it genuinely is a pathogen or an insect, there is a fairly predictable local list.
- Emerald ash borer on every untreated ash
- Bacterial leaf scorch on pin and red oak — chronic and progressive
- Oak wilt on red oaks — fast-moving, and easy to confuse with bacterial leaf scorch early on
- Bagworms on arborvitae, juniper, and spruce
- Japanese beetle on linden, crabapple, and birch
- Anthracnose on sycamore after a cool, wet spring
- Dogwood anthracnose on shaded, low-airflow dogwoods — common in Frankfort’s older neighborhoods
- Scale insects on maple and magnolia — magnolia scale crawlers are active in September, the treatment window
- Fall webworms on walnut, pecan, and hackberry in late summer and fall — see our fall webworm guide for when to remove a nest yourself vs. call us
Sometimes nothing should be done
Sycamore anthracnose looks alarming in May and the tree releafs. Japanese beetle damage in July is ugly and rarely threatens an established tree. Neither warrants a treatment programme.
Where laboratory confirmation is genuinely warranted, Kentucky’s Cooperative Extension system and the UK Department of Entomology provide diagnostic services, and we will tell you when a case calls for it.
Common questions
Should I put my trees on a spray programme?
Only for a diagnosed problem with a known treatment window. Calendar spraying with no target is money spent on nothing and it is hard on pollinators and beneficial insects.
My tree has been declining for years with no obvious cause.
Look at the root flare and at what changed on the site in the last decade. Slow multi-year decline is far more often a root or site problem than a disease.
Is the diagnosis visit free?
Yes. If a case warrants laboratory confirmation through the state diagnostic system, we will tell you before anything is submitted.
Can a tree with leaf scorch be cured?
Bacterial leaf scorch is managed rather than cured. Reducing other stress helps; planning for eventual replacement is the realistic long view.
Related: hail damage to trees · emerald ash borer · common Central Kentucky trees · trimming and pruning. Back to Frankfort Tree Pros.
Frankfort Tree Pros · Serving Frankfort, Georgetown, Versailles, Lawrenceburg & Franklin County, KY · Call or text (859) 310-1209
Last updated August 2026
New: Why Are My Trees Losing Leaves Early? — drought stress vs. disease, and how to tell them apart.
Also see: Is My Black Walnut Tree Killing My Garden? — juglone toxicity, which plants tolerate it, and what to do about it.
New: Bagworms on Arborvitae & Leyland Cypress — why September means hand removal, not spraying, and what a pro visit costs.
New: Scale Insects on Maple & Magnolia — why September is the magnolia scale crawler treatment window, and what it costs to treat.
New: Japanese Beetle Tree Damage — why September skeletonizing looks worse than it is, and when a tree needs a fertilization visit instead of just time.
New: Sycamore Anthracnose in Frankfort, KY — why river-adjacent sycamores mottle every spring, and when (rarely) it is a removal call instead.
Related reading: Is verticillium wilt a risk to maples and tulip poplars?