In July 2025, UMass Facilities Management will be treating Beech trees on campus for Beech Leaf Disease (BLD), a rapidly spreading complex associated with the foliar nematode Litylenchus crenatae. The disease causes damage to a tree’s leaves, leading to reduced vigor and possible tree mortality if left untreated.
The disease has been particularly damaging in Southern New England, where many trees are dying rapidly after infection. Starting July 2, American and European Beech trees on campus will receive preventative treatments of Agri-Fos (phosphite fertilizer) to boost their natural immunity against infection. Trees already infected will be treated with either a foliar application of Broadform or trunk injections of Arbotect; all of these products are registered with the EPA as safe for use on ornamental plants. Treated trees will be appropriately flagged during both applications of these products in early July and again in August; the campus community should avoid these areas for the duration of the treatment (typically 24 hours).
Any questions about Beach Leaf Disease treatments on campus should be directed to UMass Facilities Service Center.
