Is one of your trees looking less lively than usual? Sometimes, even the most well-tended specimens can rapidly decline when a disease takes hold.
As the go-to crew for tailored tree services in Richwood, TX, we at Country Trees know about our area’s prevalent arboreal challenges. Keep reading to learn how to identify common tree diseases.
What Is a Tree Disease?
Trees are symbols of strength and endurance that stand tall for decades, sometimes centuries, without much trouble. It’s easy to forget that they can get sick, too, just like any other living thing.
Bacteria, viruses, fungi, nematodes, and other pathogens may infect a tree’s vulnerable interior and cause decay or structural damage. A thick layer of bark usually acts as their armor, but wounds created by pests, harsh weather, or human activity create entry points for these harmful agents.
Visual Clues To Diagnose Your Specimen’s Ailment
Early identification and treatment can save your tree from an early demise. If you want to know how to identify tree disease, start with the most common ones:
Dutch Elm Disease
Do beautiful elm trees grace your yard? Many know them for their vast canopies, distinctive leaves, and interwoven branches.
Dutch elm disease is a devastating infection that affects this species, caused by the fungi Ophiostoma ulmi and Ophiostoma novo-ulmi. These invade the vascular system, which transports water and nutrients, and starve the tree from within.
Symptoms:
- Yellowing and wilting leaves on a single branch or one side of the tree, especially during summer or early fall
- Affected leaves turning brown, curling up, and falling off prematurely
- Streaky or patchy bark lesions, and inner wood that appears brown when exposed
Oak Wilt
As the name suggests, oak wilt is an ailment that blocks the water-conducting vessels of oaks, leading to rapid wilting and death. The culprit is a fungus called Bretziella fagacearum, and it usually spreads through insect vectors and root grafts.
Many parts of Texas have lost countless trees to this devastating disease. If you have oaks in your yard, a specialist might recommend preventive systemic fungicides to protect them. It’s possible to save infected specimens with the same treatment, but those with over 30% canopy loss often cannot recover.
Symptoms:
- Wilting leaves, usually starting at the outermost branches before moving inward
- Leaf discoloration during summer or early fall
- Fungal mats, a type of spore-producing fungal growth that smells sweet, like fermenting fruit
- Dark staining under the bark, which often indicates a late-stage infection
Apple Scab
If you want to know how to identify tree disease, why not start with the ones that impact fruit yield? Apple scab is an ailment caused by the Venturia inaequalis fungus, and it primarily targets apple and crabapple varieties. While not necessarily fatal, ignoring it will severely impact fruit quality and overall tree health.
Symptoms:
- Brown or black leaf spots, which may eventually grow and coalesce
- Misshapen and distorted-looking foliage
- Dark, scabby fruit lesions
- Premature leaf drop
Prevention Is the Best Cure
Instead of waiting for unsightly cankers or wilting branches to manifest in your garden, follow these proactive steps:
- Choose disease-resistant varieties when planting.
- Maintain proper spacing to improve air circulation and reduce humidity.
- Regularly prune and remove dead or diseased branches to prevent the spread of infection.
- Water consistently and deeply, focusing on the roots rather than the leaves.
- Rake up and dispose of fallen leaves or fruit to eliminate potential sources of fungal spores.
- Apple preventative fungicides during the early growing season.
Even when you know how to identify tree disease, it never hurts to seek a second opinion. Let Country Trees take a look. Call 979-824-0325 or read our blog post on rotting trees.