Overview
Hickory oak forest with many paw paw saplings. On stick in leaf litter. Specimens of G. Rufa scattered over large stretch of woods:~ 10x20 ft.
- 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 hairy rubber cup. 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 hairy rubber cup?
Hickory oak forest with many paw paw saplings. On stick in leaf litter. Specimens of G. Rufa scattered over large stretch of woods:~ 10x20 ft.
What are the symptoms of hairy rubber cup?
Where is hairy rubber cup currently found?
hairy rubber cup is currently active in Pennsylvania, Virginia, Illinois, New York, Kentucky, New Jersey, Ohio, Massachusetts, Maryland. It has been reported in 9 total states across the United States.
How do I treat hairy rubber cup?
Treatment options for hairy rubber cup 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.