Black-staining Polypore in Maine
MODERATEFungus
Black-staining Polypore is currently active in Maine. Watch your susceptible trees closely and act early.
About Black-staining Polypore
Maybe berkeley's? But I'm used to seeing them right up against trees and this was about 15ft from nearest tree
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 Black-staining 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 Maine arborists →Frequently asked questions
Is Black-staining Polypore in Maine?
Black-staining Polypore is currently active in Maine. Watch your susceptible trees closely and act early. It was first recorded here on July 17, 2026.
What does Black-staining Polypore look like?
How do I treat Black-staining 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.