Does a diseased tree always need to come down? It is an understandable concern when a tree you value starts looking unhealthy. The answer depends on what is causing the problem and how much of the tree is affected.
Some common tree diseases in Maryland affect mainly the leaves, while others damage roots or cause branches to die over time. Knowing the signs can help you understand what you are seeing and have a more informed conversation with a tree care professional.
Tree Diseases Maryland Homeowners Should Recognize
The type of tree, when symptoms appear, and the parts affected can help explain what is happening. The following signs can point to a disease, but similar symptoms may have other causes.
Bacterial Leaf Scorch
This disease makes it harder for water to move through a tree. Leaf edges turn brown in mid-to-late summer, and branches may die as it progresses. It affects oaks, maples, and other shade trees. There is no cure, but a diagnosis helps guide care.
Anthracnose
Anthracnose causes brown patches, curled leaves, and early leaf drop, especially during cool, wet springs. Oaks, maples, and other shade trees can be affected. Healthy, established trees usually tolerate the leaf damage, and many grow new leaves.
Powdery Mildew
Powdery mildew looks like a white dusting on leaves and new growth. It affects trees such as dogwoods and crape myrtles. Leaves may curl or fall early. It rarely kills trees, but it can slow growth, especially in young trees.
Brown Rot on Flowering Cherry Trees
Brown rot can turn cherry blossoms brown and cause small branches to die. Withered leaves may stay attached, and damaged bark may ooze a sticky substance. If flowers wither and nearby branches begin dying, arrange a tree assessment.
Root Rots
Root rots damage a tree’s roots, leading to slow growth, yellowing or browning leaves, and dying branches. Mushrooms sometimes appear around the base. Damaged roots may also make the tree less stable, so suspected root decay needs professional attention.
A Newer Concern in Maryland: Beech Leaf Disease
Beech leaf disease was first confirmed in Maryland in 2023 and has since been found in many counties. Early signs include dark stripes between the veins of leaves. Leaves may later become thick or curled, and fewer leaves may grow as the disease progresses.
This disease can kill beech trees. If you notice these signs, arrange an assessment with a qualified tree professional. University of Maryland Extension can also review photos to help identify a possible infection.
Is It Disease or Another Tree Problem?
Brown leaves and dying branches do not always mean disease. Too little or too much water, frost, insects, and damage from digging near roots can cause similar changes. Identifying the cause helps avoid treatment that will not solve the problem.
Before arranging an assessment, gather a few useful details:
- Note when changes began. Did they appear during spring growth or later in summer?
- Look at the pattern. Is one branch affected, or are changes visible throughout the tree?
- Take clear photos. Include the whole tree and close-ups of affected leaves or bark.
- Mention recent yard work. Digging, construction, and watering changes may help explain the problem.
These observations can help a professional understand how the problem developed.
Can a Diseased Tree Be Saved?
Some diseases can be managed with appropriate care, while others have no cure. Even then, removal is not always necessary. The next step depends on the disease, the damage, and the tree’s overall condition.
Have your tree assessed if branches keep dying, symptoms worsen each year, or mushrooms or shelf-like growths appear on the trunk or around its base. A professional can recommend care and assess whether decay has weakened the tree.
Talk to Nelson Tree Specialist About Your Tree
If you are unsure what changes in your tree mean, an evaluation can help you understand its condition and your options.
Nelson Tree Specialist provides tree care services, pruning, and removal for Maryland properties. Contact us to discuss your concerns and arrange an evaluation.