Common Tree Diseases in Contra Costa County

The East Bay’s mild winters and dry summers create ideal conditions for many tree diseases. Our arborists commonly identify and treat:
• Sudden Oak Death (SOD) – A fungal-like pathogen fatal to oaks and tanoaks.
• Fire Blight – A bacterial infection that causes blackened shoots and scorched-looking leaves, often in pear and apple trees.
• Anthracnose – Fungal leaf blight common on sycamores, walnuts, and oaks.
• Powdery Mildew – A white coating that weakens foliage and reduces vigor.
• Root Rot – Soilborne fungus that disrupts water and nutrient uptake.

Early diagnosis and targeted treatment can prevent spread and protect surrounding trees.

Our Tree Disease Management Process

Evergreen follows a structured approach to stop disease progression and restore tree health:
1. Diagnosis – Our Certified Arborists inspect foliage, bark, and root conditions to identify the specific pathogen.
2. Treatment Plan – We develop a customized plan based on tree species, environment, and disease severity.
3. Application – Treatments may include trunk injections, soil drenches, or bark sprays using targeted fungicides and antibiotics.
4. Ongoing Monitoring – We schedule follow-ups to confirm recovery and prevent reinfection.

When to Schedule Tree Disease Treatment

Many tree diseases progress silently before symptoms appear. Schedule a professional inspection if you notice yellowing, leaf drop, oozing bark, or scorched-looking foliage. Early treatment—especially in spring and fall—greatly improves the chances of full recovery and prevents the spread of pathogens to nearby trees.

Why Choose Evergreen for Tree Disease Management

Since 1980, Evergreen Tree Care has protected trees throughout Contra Costa County with expert diagnosis and effective treatment programs. Our ISA Certified and TRAQ Qualified Arborists use proven science and regional experience to help your trees recover naturally while minimizing chemical use and environmental impact.

East Bay Clients Trust Evergreen for Tree Disease Care

Clients throughout Contra Costa County rely on Evergreen Tree Care for professional disease management that preserves valuable trees and strengthens landscapes for the long term.

Explore More Plant Health Care Services

Our disease management programs work best as part of a complete Plant Health Care plan designed to prevent stress and keep trees thriving. Explore other services that support long-term health and resilience.

Tree Pest Management

Insects and borers often introduce or spread disease. Our pest management programs target harmful species like bark beetles and aphids to keep your trees protected year-round.

Soil & Root Health

Healthy soil is your tree’s first line of defense. Evergreen’s soil treatments improve oxygen exchange, nutrient balance, and microbial activity to reduce disease susceptibility.

Drought Stress Management

Drought stress weakens trees and increases disease vulnerability. Our hydration and PHC treatments restore root moisture and improve natural resistance during dry East Bay seasons.

Schedule Your Tree Service Today

Get expert care from trusted East Bay arborists—call 925-825-8165 or request an appointment using the form below, and we’ll take care of the rest.

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What to expect

We believe tree care should be simple and stress-free. When you call our office or submit a request form, our team handles every detail so your tree service experience is as easy as possible.

Initial Contact – We confirm your details and schedule a convenient appointment.
On-Site Evaluation – A Certified Arborist visits your property to assess your trees and answer questions.
Personalized Proposal – You receive a clear estimate with recommended services and next steps.
Scheduling & Service – Once approved, we book your project and complete the work safely and efficiently.