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Servicing Harford County, Baltimore County & Baltimore City

Common Tree Diseases and Pests in Maryland  

Common Tree Diseases and Pests in Maryland  

In this blog, we’ll go over some of the most common tree diseases and pests in Maryland.

Trees are a crucial part of Maryland’s natural environment, providing many benefits like clean air, shade, and aesthetic beauty. However, they’re also susceptible to a lot of diseases and pests that could cause serious damage, falling limbs, or worse, a dead tree if left uncared for. In this blog, we’ll go over some of the most common tree diseases and pests in Maryland, their main symptoms, and how you can prevent and treat each one.

Common Maryland Tree Diseases  

Oak wilt is a common fungal disease that affects Maryland oak trees and causes fast tree decline and death. Symptoms of oak wilt include wilting leaves, discoloration, and the branches dying. This disease is spread through root grafts and sap-feeding beetles. Treatment options for oak wilt include fungicides and pruning the infected branches. Dogwood anthracnose is another disease. As a fungal diseases, it affects dogwood trees, causing leaf spots, stem cankers, and dieback. The disease is spread all through rainwater and could be prevented by improving tree health, avoiding tree stress, and removing any infected branches. Apple scab is one other fungal disease that affects crabapple and apple trees, causing leaf spots and premature leaf drop. This disease is mostly spread through rainwater and can be prevented by planting disease-resistant tree varieties, which do improve tree health, and also by removing infected leaves.

Common Tree Pests

Emerald ash borer is a very bad invasive beetle that eats ash trees, causing serious damage and tree death entirely. Symptoms of emerald ash borer infestations include any D-shaped exit holes in the tree’s bark, bark splitting, or branch dieback. Treatment options for emerald ash borer include insecticides, tree removal services, and replanting with disease-resistant tree species. Gypsy moths are invasive pests that feed on deciduous trees, causing defoliation and serious tree damage. Symptoms of any tree moth infestation include stripped leaves or damaged bark. Treatment options for gypsy moth include tree banding, insecticides, and removing the egg masses. Bagworms are moth larvae that feed on evergreen trees, which causes defoliation and damage to the trees. Symptoms include bag-like cocoons on the branches and stripped tree foliage. You can have us remove the cocoons. Just give us a call as soon as you can!

Tree Care and Maintenance from Harford Tree

Ready to have the beautiful yard you have always dreamed of? Harford Tree Experts & Landscaping, Inc has been in the business for decades, providing customers with quality work and quick responses all at the right price. We service the areas of Harford County, Baltimore County, and Baltimore City areas including Bel Air, Fallston, Perry Hall, Towson, Essex, Parkville, White Marsh and Middle River.

For service during business hours, reach out to us or give us a call at 410-592-7321. We offer 24/7 emergency service as well, just give us a call at 443-250-6649. For updates about our business and more informative tips, follow us on Facebook and Twitter.

This entry was posted on Thursday, July 16th, 2026 at 4:07 pm. Both comments and pings are currently closed.

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