Beech Leaf Disease is an issue that is developed in whole or part by a foliar nematode (Litylenchus crenatae mccannii). It was first discovered in 2012 in Ohio and has since spread to 8 different states and Canada. While much of this issue is still poorly understood, it is a significant threat to Beech trees, as it can kill a mature tree in as little as 6 years.
• Symptomatic Leaves are almost always accompanied by thousands of the foliar nematode Litylenchus crenatae mccannii (LCM).
• LCM emerges from leaf tissue and overwinters in the buds of infested trees.
• Research is being done to determine if there is another causal agent involved in the development of BLD.
American Beech (Fagus grandifolia) and European Beech (Fagus sylvatica)
• Dark interveinal banding is present in infested trees. Can be easily identified from the ground when looking up into the trees canopy.
• As the disease progresses leaves get a darker, thicker and leathery in texture.
• Trees will thin out and produce less buds and branches as the disease returns in subsequent years.
BLD has been reported in every state in the Northeast with a recent positive diagnosis in Virginia.
No other known pest or diseases cause similar damage in Fagus species.
Due to the unique banding and damage patterns, field diagnosis is usually sufficient.
Research is still being done to determine the efficacy of numerous different active ingredients and treatment options.
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