9 Steps to Managing Leaf Spot Diseases on Your Trees

Date June 04, 2022

Author TreeNewal Staff

One of the most common problems that homeowners face is leaf spot diseases on their trees. These diseases initially affect a tree cosmetically, and if left untreated, they can lead to very serious issues with the ability of a tree to properly photosynthesize. In this blog post, we will share 9 steps that you can take to manage leaf spot diseases and protect your trees!

What Is a Leaf Spot Disease?

Leaf spot disease is caused by a variety of fungi and bacteria. These pathogens infect the leaves of trees, causing them to turn brown or black. Leaf spot diseases can weaken the tree and make it more susceptible to other problems, such as insect infestations.

There are many types of leaf spot diseases that are common in North America that can affect a wide range of host plants. Some examples include Entomosporium, Alternaria, Tubakia, and Taphrina.

How to Manage Leaf Spot Diseases

There are a few different ways that you can manage leaf spot diseases. The best way to prevent these diseases is to plant trees that are resistant to them. However, if you already have trees that are infected with leaf spot diseases, there are a few things that you can do:


The first step is to identify the type of leaf spot disease that is affecting your trees. There are many different types of leaf spot diseases, and each one requires a different treatment approach. Once you have identified the type of disease, you can then begin to treat it.

Avoid Overcrowding Plants

One of the best ways to prevent leaf spot diseases is to avoid overcrowding your plants. When plants are too close together, they are more likely to become infected with Leaf Spot Diseases.

Reduce Stress on Trees

It is also important to reduce stress on your trees. This can be done by watering them regularly and fertilizing them properly.


Another treatment option is to prune out affected leaves and branches. This can be difficult to do, but it is often necessary to prevent the spread of the disease. If you are not comfortable pruning your own trees, you can hire a professional tree service to do it for you.

Hire a Professional

If you are not sure how to treat Leaf Spot Diseases, it is best to hire a professional. TreeNewal has a team of Certified Arborists who can help you identify and treat Leaf Spot Diseases.

Perform a Soil Test

One of the best ways to prevent Leaf Spot Diseases is to perform a soil test. This will help you determine the pH of your soil and what nutrients and resources may need adjusting.

Avoid Excessive Watering

Another way to prevent leaf spot diseases is to avoid excessive watering. Watering your plants too much can make them more susceptible to Leaf Spot Diseases.

Apply Fungicide

One of the most drastic treatments for leaf spot diseases is to use a fungicide. Fungicides are chemicals that kill fungi, and they can be very effective at treating leaf spot diseases. There are many different types of fungicides available, so you should consult with a professional to find the best one for your situation.

Leaf spot diseases can be difficult to manage, but with the right approach, you can protect your trees from these damaging diseases. If you have any questions about leaf spot diseases or how to treat them, please reach out to TreeNewal anytime! Our certified arborists are always happy to help!

If you need advice or assistance with managing leaf spot diseases on your trees, get in touch with the ISA-Certified Arborists at TreeNewal and enjoy tailored tree care advice.

To learn more about 9 Steps to Managing Leaf Spot Diseases on Your Trees, call our Argyle and Southlake-based teams

at (817) 592-6846 or send us a message.

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