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Invasive Diseases
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Updated: October 21, 2024
Beech Leaf Disease in Maryland
A new disease is affecting all types of beech trees in the northeastern United States. Symptoms of Beech Leaf Disease include dark bands on leaves, yellowing and distorted leaves. Maryland residents should report symptoms to Extension.
Updated: March 29, 2024
Impatiens Downy Mildew
Look closely on the underside of impatiens leaves for the mold spores.
Updated: February 22, 2023
Sudden Oak Death/Ramorum blight
Although not yet identified in Maryland, be on the lookout for sudden oak death.
Updated: February 22, 2023
Oak Wilt Disease
Oak trees declining with no obvious external causes may have the invasive oak wilt disease.
Updated: February 22, 2023
Thousand Cankers Disease
Thousand cankers disease has been identified in Maryland.
Updated: February 22, 2023
Boxwood Blight
Boxwood blight is a devastating disease of boxwood plants.
Updated: February 22, 2023
Beech Bark Disease
Invasive and deadly beech bark disease.