Berkeley's Polypore in Illinois
MODERATEFungus
Berkeley's Polypore is currently active in Illinois. Watch your susceptible trees closely and act early.
About Berkeley's Polypore
Found growing at base of large maple tree, harvested specimen is 8 inches long, 5 inches wide and 3 inches tall but the stipe extended another 4 inches before being cut. Older and larger specimen was about a foot in diameter. Sulfur scent like chicken of the woods and non-staining white flesh.
Symptoms to watch for
Treatment options
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 Berkeley's Polypore. 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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Browse all Illinois arborists →Frequently asked questions
Is Berkeley's Polypore in Illinois?
Berkeley's Polypore is currently active in Illinois. Watch your susceptible trees closely and act early. It was first recorded here on August 16, 2026.
What does Berkeley's Polypore look like?
How do I treat Berkeley's Polypore?
Options include: Fungicide Application, Sanitation and Pruning, Soil and Moisture Management. Confirm the diagnosis before treating, and consider a certified arborist for high-value trees.