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Updated: May 6, 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: February 24, 2023

IPM - Prevent, Identify, and Manage Plant Problems

How to ID, prevent, and manage plant problems in Maryland using IPM
no lawn landscape
Updated: June 5, 2024

Rust Diseases of Trees

Alien looking orange balls with horns are the fruiting bodies of cedar-apple rust on juniper trees.
Cedar-apple rust gall
Updated: May 30, 2024

Apple Scab Disease

Apple scab is a common fungal disease of apple and crabapple trees that first appears as olive-green spots without distinct borders.
Apple scab lesions
Updated: June 22, 2023

Fire Blight Disease of Trees

Infected leaves of fire blight infected trees and shrubs in the rose family hang on and droop in a classic 'shepherd's crook.'
Fire blight on branch
Updated: June 8, 2023

Why Oak Trees are Declining or Dying

Oak trees are declining for a variety of reasons.
oak decline symptoms
Updated: May 25, 2023

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 18, 2023

How Do You Decide When to Remove a Tree?

Factors to consider when removing a tree.
tree decline - dead branches in canopy
Updated: May 11, 2023

Needle Cast Diseases of Evergreen Trees

Yellow or brown spots on the needles of spruce trees can be caused by a needle cast disease.
Updated: April 24, 2023

Elsinoë Leaf Spot of Dogwood

Spot anthracnose or Elsinoë leaf spot on flowering dogwood trees can infect flowers, leaves, and fruit but resistant cultivars are available.
spot anthracnose - elsinoe leaf spot on dogwood flowers