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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.
darker green stripes on beech leaves
Updated: March 29, 2024

Impatiens Downy Mildew

Look closely on the underside of impatiens leaves for the mold spores.
impatiens downy mildew
Updated: February 22, 2023

Sudden Oak Death/Ramorum blight

Although not yet identified in Maryland, be on the lookout for sudden oak death.
sudden oak death symptoms on rhododendron leaf
Updated: February 22, 2023

Oak Wilt Disease

Oak trees declining with no obvious external causes may have the invasive oak wilt disease.
oak wilt disease
Updated: February 22, 2023

Thousand Cankers Disease

Thousand cankers disease has been identified in Maryland.
thousand cankers disease on walnut tree
Updated: February 22, 2023

Boxwood Blight

Boxwood blight is a devastating disease of boxwood plants.
boxwood defoliation from boxwood blight
Updated: February 22, 2023

Beech Bark Disease

Invasive and deadly beech bark disease.
beech bark disease