Tree Diseases

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Updated: June 28, 2021

How to Identify, Prevent, and Manage Plant Problems

How to ID, prevent, and manage plant problems in Maryland
no lawn landscape
Updated: July 13, 2021

Dutch Elm Disease of Trees

Dutch elm disease shows as wilted branches of leaves that turn yellow and then brown.
Dutch elm disease
Updated: July 13, 2021

Wilt Diseases of Trees

Wilting can be a sign of physical injury, incorrect planting, drought, salt damage, or fungal wilt diseases.
verticillium wilt symptoms on a cherry tree
Updated: July 1, 2021

Why Oak Trees are Declining or Dying

Oak trees are declining for a variety of reasons.
oak decline symptoms
Updated: June 14, 2021

Diagnose Dogwood Problems - Chart

Easy to use chart to identify problems with dogwood trees.
Updated: May 26, 2021

Viral Diseases of Trees

Unusual or different patterns on tree leaves can be a sign of a viral infection.
yellowed foliage on apple - apple mosaic virus symptoms
Updated: May 25, 2021

Anthracnose Diseases of Shade Trees

Distinct lesions patterns along leaf veins are signs of anthracnose disease on shade trees.
anthracnose symptoms - leaf spots on maple
Updated: May 25, 2021

Cherry Shot Hole Disease

Holes in the leaves of cherry trees are often caused by disease and not damage from insect feeding.
holes in cherry tree leaves - leaves drop early - cherry shot hole symptoms
Updated: May 24, 2021

Seiridium and Botryosphaeria Canker of Leyland Cypress

Individual Leyland cypress branches die (flagging) is a sign of cankers or lesions from fungal diseases.
brown branch tips of leyland cypress - seiridium canker symptoms
Updated: May 24, 2021

Why Are Leyland Cypress Trees Turning Brown?

Leyland cypress problems to know about.
brown branches on leyland cypress