Beech Leaf Disease in Maine
HIGHDisease
Beech Leaf Disease is currently active in Maine. Watch your susceptible trees closely and act early.
About Beech Leaf Disease
An emerging disease caused by a foliar nematode first identified in Ohio in 2012. It has spread rapidly through the native range of American beech. Affected trees can decline and die within 6-10 years. No effective treatment exists at scale.
Symptoms to watch for
Dark interveinal banding on leaves visible when held to light, thickened and leathery leaf texture, curled and crinkled leaves, canopy thinning, bud loss and reduced leaf size over successive years
Trees at risk in Maine
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Treatment options
Phosphonate Foliar Spray (Research Stage)
Experimental application of phosphonate compounds has shown some suppression of the nematode in research trials. Not yet widely available as a management tool. Research is ongoing.
Recommended Products & Tools
Helpful supplies for managing Beech Leaf Disease. Always read and follow label directions, and confirm a diagnosis before treating.
Protectant spray for many bacterial and fungal diseases.
For the rare case sealing is advised (e.g., oaks in oak-wilt season).
Sharp, clean cuts to remove affected wood — a tree-care essential.
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Need help with Beech Leaf Disease in Maine?
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Browse all Maine arborists →Frequently asked questions
Is Beech Leaf Disease in Maine?
Beech Leaf Disease is currently active in Maine. Watch your susceptible trees closely and act early.
What does Beech Leaf Disease look like?
Dark interveinal banding on leaves visible when held to light, thickened and leathery leaf texture, curled and crinkled leaves, canopy thinning, bud loss and reduced leaf size over successive years
What trees does Beech Leaf Disease affect in Maine?
It affects American Beech. Susceptibility varies by species.
How do I treat Beech Leaf Disease?
Options include: Phosphonate Foliar Spray (Research Stage). Confirm the diagnosis before treating, and consider a certified arborist for high-value trees.