Insect/Disease Diagnosis

Updated: May 2, 2020

If you worried that a tree on your property might be diseased or dying, then you are smart to be concerned. You need to watch out for falling trees during windstorms. There are warning signs for common tree diseases that you should look for. First determine if your tree needs help. If you notice any of these issues, contact us Don’s Trees to schedule an inspection.

1. Cracks: Cracked Tree due to tree disease. Discolored leaves, Is it losing leaves prematurely vs. other trees of the same species, soft spots, fungi, open wounds or rot.

2. The Twig Test: To check for unapparent tree death, perform a simple twig test. Break off a twig and see what it looks like on the inside. As long as the tissue is green the tree is still living, but if it’s dark and brittle, that twig is dead. If you find one dead twig, check other twigs and branches to determine whether the entire tree is lost.

3. Clean it up: After performing the twig test, if you discover healthy tissue it’s critical that you cleanly prune the branches you have broken off as improper wounds will attract more diseases and pests. If you’ve found a mixture of dead and healthy branches, you’ll need to remove the dead wood as soon as possible. When working with mature trees, it’s recommended that you call a professional as we have the knowledge needed to effectively heal and remove them.

4. Old age: Some trees just live longer than others. For example, various ornamental fruit tree species (like flowering cherries) may only live to be twenty-five or thirty years old, while Douglas firs and Giant Sequoias can live for hundreds of years. If you suspect that one of your trees is reaching the end of it’s golden years, call Don's Tree Service for a possible removal. Don’t wait for it to fall and cause thousands of dollars in damage or life!

5. Fungus: There’s a fungus common in many areas. It’s called anthracnose, it loves wet weather, and its spores are easily spread by wind. When attacking trees, the fungus can cause leaf discoloration and defoliation, especially if the tree is stressed by something else like pests or poor pruning. Other tree species like oak, sycamore, dogwood, and Japanese maple are also susceptible to anthracnose. It’s just one of hundreds of pathogens and pests that could potentially harm your trees. For an accurate diagnosis, it’s best to consult a tree care professional.

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