Northern Red Belt
MODERATEFomitopsis mounceae
Overview
10/5/26 W3W: winced.shrug.element 5:41 pm Clear sky 69 degrees f Low elevation Old growth deciduous forest Relatively dry This fungus grew both spaced out near itself or solitarily on dead logs, belonging to either aspen, cedar, or maple. In appearance, I found them anywhere from 2 to 4 inches long across and they were all consistent in color and pattern. They are burnt orange in the center at the top, and fade into a clay orange gradient that cuts to a harsh yellowy white around the edge
- Type
- Fungus
- Severity
- MODERATE
- Source
- iNaturalist
Symptoms
Geographic Spread
Treatments
Fungicide Application
Apply systemic or contact fungicide at the first sign of infection. Repeat applications may be needed during wet weather. Follow label rates and timing.
Sanitation and Pruning
Remove and destroy all infected leaves, branches, and fallen debris. Improve air circulation by thinning dense canopy growth. Sterilize pruning tools.
Soil and Moisture Management
Ensure proper drainage, avoid overwatering, and apply mulch to reduce soil splash. Many fungal pathogens thrive in persistently wet conditions.
Recommended Products & Tools
Helpful supplies for managing Northern Red Belt. Always read and follow label directions, and confirm a diagnosis before treating.
Broad-spectrum protectant for many fungal leaf and bark diseases.
Preventive spray for needle cast, leaf spots, and blights.
Sharp, clean cuts to remove affected wood — a tree-care essential.
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Frequently Asked Questions
What is Northern Red Belt?
10/5/26 W3W: winced.shrug.element 5:41 pm Clear sky 69 degrees f Low elevation Old growth deciduous forest Relatively dry This fungus grew both spaced out near itself or solitarily on dead logs, belonging to either aspen, cedar, or maple. In appearance, I found them anywhere from 2 to 4 inches long across and they were all consistent in color and pattern. They are burnt orange in the center at the top, and fade into a clay orange gradient that cuts to a harsh yellowy white around the edge
What are the symptoms of Northern Red Belt?
Where is Northern Red Belt currently found?
Northern Red Belt is currently active in Alaska, California, Massachusetts, Maine, Michigan, Minnesota, New York, Oregon, Washington. It has been reported in 9 total states across the United States.
How do I treat Northern Red Belt?
Treatment options for Northern Red Belt include: Fungicide Application, Sanitation and Pruning, Soil and Moisture Management. Treatment approaches may include chemical, biological, cultural, and mechanical methods depending on the severity and context.