Tree Problem Diagnostic
Utilize our expertise to learn about tree issues and identify proper solutions. This comprehensive guide will help you diagnose tree problems and determine the right treatment approach.

Professional Diagnostic Process
Follow this systematic approach to accurately identify tree problems and develop effective treatment strategies.
Visual Inspection
Examine the tree for visible signs of damage, discoloration, or abnormal growth patterns
Tree Identification
Properly identify the tree species, as different species have different vulnerabilities
Symptom Analysis
Document specific symptoms including location, timing, and severity of the problem
Reference Comparison
Compare findings with known pest and disease profiles in our glossary
Treatment Planning
Develop an appropriate treatment strategy based on the identified problem
Common Warning Signs
Recognize these common signs of tree problems to catch issues early and prevent serious damage.
Leaf Problems
- Yellowing or browning leaves out of season
- Spots, blotches, or unusual patterns on leaves
- Premature leaf drop
- Wilting despite adequate moisture
- Holes or chewed edges
Branch & Trunk Issues
- Dead or dying branches
- Cankers or sunken areas on bark
- Unusual growths or swellings
- Boring holes or sawdust-like material
- Oozing sap or discolored bark
Root & Base Problems
- Mushrooms or fungi at tree base
- Root exposure or damage
- Soil compaction around roots
- Tree leaning or instability
- Poor growth despite good conditions
Ash Tree Identification Guide
Proper tree identification is crucial for effective diagnosis and treatment. Learn to identify different ash species, particularly important due to Emerald Ash Borer threats.
Emerald Ash Borer Alert
In North America, Emerald Ash Borer has only been found in ash trees. All species of North American ash appear to be susceptible to this destructive pest.
White Ash
Fraxinus americana
- Glaucous (pale) undersides of leaves
- Flaky or peeling outer surface of twigs
- Forest tree commonly found with Sugar Maple
- Lighter colored leaf undersides compared to upper sides
Green Ash
Fraxinus pennsylvanica
- Leaves similar in color on both upper and lower sides
- Smoother twigs compared to White Ash
- Pioneer species in riparian zones and disturbed areas
- Most widely distributed of all American ashes
Black Ash
Fraxinus nigra
- Grey, thick and corky bark even on young trees
- Dark brown to blackish winter buds with velvety texture
- Leaflets are sessile (directly attached to rachis)
- Typically found in northeastern United States and eastern Canada
For Emerald Ash Borer control, Mauget recommends Imicide for effective, season-long protection.
Learn About ImicideNeed Professional Assistance?
If you're unsure about your tree's condition or need help with identification, consult with a certified arborist or tree care professional who can provide expert diagnosis.