5 Common Tree Diseases in California and How to Identify Them

Sometimes sun and water are enough for trees to live long, healthy lives, but sometimes, other factors get in the way. Even if trees get all the nutrients and water they need, some common tree diseases can affect the health and appearance of your plants.

Luckily, tree service experts in Santa Monica, CA can help you identify and treat local tree diseases.

5 of the Most Common Tree Diseases in California: How to Protect Your Landscape

Infected trees usually manifest with dead or dying branches, thick canopies, and leaf problems. If you notice any of these signs, talk to a tree service expert to determine the cause of the damage and find a solution.

While the symptoms above are common in most diseases, each tree disease carries unique signs. Here are some of the most common tree diseases in California that may attack your plants.

#1. Sudden Oak Death

Sudden oak death is one of the most dangerous canker diseases in California. It sounds like it would only affect oak trees, but that’s not the case.

It starts with mold, leading to canker and absorbing all nutrients the tree needs to survive. Sudden oak death is also very contagious.

If the disease spreads, it is difficult to cure the trees. You may be able to prune and remove the diseased branches, apply fungicide, fertilize the tree, and wait to see what happens.

#2. Fusarium Wilt

Fusarium wilt is another tree disease that’s frequent in Santa Monica and the surrounding areas in California. It mostly attacks palm trees, bananas, tomatoes, and other food crops.

The infection starts in the roots by blocking the water transport, causing leaves to wilt and turn yellow. Fusarium wilt favors warm soil temperatures, while Verticillium wilt (another fungus) favors cool soil temperatures.

#3. Shot Hole Fungus

Shot hole fungus usually affects Prunus species or almond and fruit trees. It spreads fast, especially when pollutants are present, but it is not always deadly. Shot hole fungus manifests with a hole in the leaf, which then turns brown and eventually falls off.

The most effective way to manage shot holes is to grow cherry laurels to prevent the fungus from spreading from plant to plant. You can also apply fungicide treatments to protect twigs and buds from infection.

#4. Chinese Elm Anthracnose

Anthracnose is a fungus that attacks Chinese elm trees, causing branches to deteriorate, starting with the tips. Some say this disease gives the tree a “curly” look.

If you don’t get a handle on the disease on time, it may weaken the tree and make it more susceptible to pests, insects, and other diseases.

#5. Fire Blight

Fire blight is a contagious disease that attacks trees in spring, making them look burnt. If you don’t catch this disease in time, it may spread fast. In one to two weeks, it can impact the entire tree.

 Fire blight can be spread by insects, birds, wind, and rain. If you notice this problem on a neighboring property, be sure to take preventative measures.

Hire a Tree Expert in Santa Monica, CA

Dealing with these diseases yourself is not easy. For this reason, many property owners in Santa Monica, CA hire a professional and licensed tree service company.

International Environmental Corporation is the go-to team in the area. We have the experience, equipment, and tools to deal with all types of tree diseases, from powdery mildew to fire blight.

If you have questions to ask a tree service company or want help treating common tree diseases, give us a call at (818) 892-9341

International Environmental Corporation

Our team of certified arborists boast a vast knowledge of tree services, making us the top choice in full-spectrum tree care and property services. Our work helps to improve the safety of residential and commercial properties that play home to trees of all sizes.


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