Tree Disease Diagnosis & Treatment

At Green Tree Care, we fully understand how truly devastating it can be to witness a once-thriving tree exhibit signs of distress and decline. The impact of tree disease can often sneak up quietly, adversely affecting not only your landscape’s overall health but also its safety and visual appeal. Recognizing this critical issue, we proudly offer professional tree disease diagnosis and treatment services in Johnson City, TN. Our mission is to assist property owners in identifying, managing, and treating a diverse range of tree illnesses before they escalate and cause irreversible damage.


Our dedicated team of ISA-certified arborists in Johnson City possesses the expertise and training necessary to spot both subtle and obvious signs of tree disease. With their expert eyes and the latest modern tools at their disposal, we can accurately pinpoint the root cause of any problems you may be facing—whether it’s due to fungal infections, bacterial issues, or insect-related infestations. Once the diagnosis is made, we provide a tailored action plan designed specifically to restore your trees to vibrant health, ensuring that your landscape flourishes once again.

Why Tree Disease Should Never Be Ignored

Diseased trees aren’t just an eyesore—they can become dangerous. Infected trees are structurally weaker, making them more likely to shed limbs or fall during storms. Certain diseases are also contagious, putting your entire landscape at risk if not diagnosed early. That’s why it’s vital to schedule a tree disease inspection in Johnson City as soon as you spot anything unusual.

Common consequences of untreated tree disease include:

  • Branch drop and canopy dieback
  • Reduced tree lifespan
  • Spread to healthy trees nearby
  • Increased risk of falling limbs
  • Expensive emergency removals

Common Tree Diseases in Johnson City, TN

The Appalachian region, including Johnson City, is home to a wide range of tree species—each with its own vulnerabilities. Our local climate (humid summers, rainy springs, and fluctuating winters) creates the perfect breeding ground for many pathogens.

Here are some of the most common tree diseases we diagnose and treat:

  • 1. Anthracnose

    Anthracnose is a common fungal disease that primarily affects deciduous trees like sycamores, oaks, dogwoods, and maples. It thrives in cool, wet spring conditions and can cause significant defoliation and branch dieback if left untreated.


    Typical symptoms include:


    Brown or tan blotches along leaf veins


    Curling and distortion of new growth


    Premature leaf drop


    Sunken lesions on twigs or stems


    Though rarely fatal, repeated infections over several growing seasons can stress the tree, making it more vulnerable to secondary pests and other pathogens. Green Tree Care addresses anthracnose with proper pruning, sanitation of fallen debris, and the use of seasonally timed fungicide treatments to suppress fungal spread.

  • 2. Powdery Mildew


  • 3. Fire Blight

    Fire blight is a highly infectious bacterial disease that primarily affects members of the rose family, especially fruit-bearing trees. It causes blossoms, leaves, and branches to turn brown or black and appear scorched—hence the name. In advanced cases, the disease can spread through the tree’s vascular system, leading to significant dieback or death.


    Trees commonly affected by fire blight:


    Apple and pear trees


    Flowering crabapples


    Hawthorns


    Quince



  • 4. Root Rot (Armillaria or Phytophthora)


  • 5. Cankers

    Localized areas of dead bark caused by fungi or bacteria. They can girdle branches or trunks, cutting off vital nutrients.

  • 6. Leaf Spot Diseases


  • 7. Verticillium Wilt



    A soilborne fungal disease that affects maples and redbuds. Causes one-sided wilting and branch dieback.


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Tree Species We Commonly Treat

We specialize in treating diseases on trees native or common to East Tennessee, including:

  • Dogwood
  • Maple (red, sugar, and silver)
  • Oak (white, red, and black)
  • Elm
  • Hickory
  • Sycamore
  • Eastern Hemlock
  • Crape Myrtle
  • Cherry and Pear Trees

Our team understands how different species react to various pathogens and environmental stressors, allowing for precise and effective treatment plans.

Symptoms of Tree Disease to Watch For

You don’t need to be a certified expert or a seasoned arborist to notice that something might be seriously wrong with your tree. If you happen to notice any of the following concerning signs, it’s important to take action and call Green Tree Care for a professional tree disease diagnosis in Johnson City, TN:


- Discolored, curling, or spotted leaves that may indicate distress

- Dead or dying branches that can pose a safety hazard

- Mushrooms or fungal growth around the trunk, which often signals decay

- Oozing sap or sunken bark that can signify internal issues

- Cracks or open wounds on the trunk that could lead to further damage

- Sudden thinning of the tree's canopy, which affects its overall health

- Leaf drop outside of the usual autumn season, indicating abnormal stress

- The presence of unusual insects or webbing, which may suggest infestation


Even if a tree appears to recover momentarily, underlying diseases often linger beneath the surface and can worsen over time. Early detection and intervention are crucial for the preservation and health of your tree. Don’t wait until it’s too late; seek professional help as soon as you notice these signs.

Our Tree Disease Diagnosis Process


At Green Tree Care, we pride ourselves on taking a scientific and thorough approach to diagnosing and treating tree diseases. Our team of experts combines extensive knowledge with advanced techniques to ensure your trees receive the best possible care. Here’s what you can expect when you call us for assistance:

  • Step 1: On-Site Tree Inspection


  • Step 2: Diagnostic Testing


  • Step 3: Identify Tree Stress Factors


  • Step 4: Customized Treatment Plan

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  • Step 5: Follow-Up and Monitoring

    We don’t stop after the first visit. Our team provides continued support to track progress and adjust treatments as needed.

01

Fungicide Applications

Used for treating fungal infections like anthracnose or powdery mildew. We time applications based on seasonal growth patterns for best results.

02

Soil and Root Zone Treatments

Healthy soil = healthy trees. We improve soil structure and introduce beneficial microbes to fight pathogens at the root level.

03

Nutrient and Mycorrhizal Injections

Nutritional deficiencies weaken a tree’s immune system. Injections help trees rebound and fight off infections.

04

Structural Pruning

Removing diseased or weak branches limits the spread of infection and reduces risk of limb failure.

05

Tree Removal (as a Last Resort)

If a tree is too far gone, we offer safe and professional tree removal services in Johnson City to prevent spread to neighboring trees.

Residential and Commercial Tree Disease Services

We proudly serve homeowners, HOAs, commercial businesses, schools, and municipalities throughout Johnson City and the surrounding Tri-Cities area. Whether you’re trying to save a single shade tree in your yard or dozens of trees on a commercial campus, we offer fast, reliable, and affordable services.