Beech Leaf Disease
HIGHLitylenchus crenatae mccannii
Overview
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.
- Type
- Disease
- Severity
- HIGH
- Source
- USFS
Symptoms
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
Affected Species
Geographic Spread
Treatments
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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Frequently Asked Questions
What is 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.
What are the symptoms of Beech Leaf Disease?
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
Where is Beech Leaf Disease currently found?
Beech Leaf Disease is currently active in Connecticut, Massachusetts, Maine, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Virginia, Vermont, West Virginia. It has been reported in 12 total states across the United States.
What plants are affected by Beech Leaf Disease?
Beech Leaf Disease affects American Beech. Susceptibility varies by species.
How do I treat Beech Leaf Disease?
Treatment options for Beech Leaf Disease include: Phosphonate Foliar Spray (Research Stage). Treatment approaches may include chemical, biological, cultural, and mechanical methods depending on the severity and context.
Compare with Similar Ailments
Not sure if it's Beech Leaf Disease? Compare it side-by-side with similar ailments.