TREE & LAWN CARE BLOG
Is My Crepe Myrtle Tree Diseased?
Crepe Myrtle Disease Trunk
To determine if your crepe myrtle is diseased, you can look for certain signs and symptoms that may indicate a problem. Here are some common indicators to watch for:
Leaf Discoloration: Check for unusual discoloration on the leaves, such as yellowing, browning, or spotting. This can be a sign of various diseases affecting crepe myrtles.
Leaf Spotting: Look for the presence of spots or lesions on the leaves. Fungal diseases like Cercospora leaf spot or powdery mildew can cause characteristic spots or powdery patches on the foliage.
Leaf Deformities: Examine the leaves for deformities or abnormalities like curling, cupping, or distortion. Certain pests or diseases can cause these changes in the leaf structure.
Powdery Coating: A powdery white or grayish substance on the leaves, stems, or buds may indicate powdery mildew, a common fungal infection affecting crepe myrtles.
Bark Issues: Inspect the bark for any signs of cracking, splitting, peeling, or discoloration. These symptoms may indicate a disease or physical damage to the tree.
Twig Dieback: Look for branches or twigs that appear dead, with no leaves or signs of new growth. This can be a result of disease or environmental stress.
Abnormal Growth Patterns: Observe the overall growth pattern of the tree. If you notice stunted growth, excessive wilting, or lack of vigor compared to other crepe myrtles in the vicinity, it could be a sign of an underlying issue.
It's important to note that some symptoms, like leaf discoloration, can also be caused by factors such as inadequate watering, nutrient deficiencies, or environmental stress. If you suspect that your crepe myrtle is diseased, it's recommended to consult with a certified arborist, horticulturist, or local extension service for a proper diagnosis and guidance on appropriate treatment options. They can provide specific recommendations based on the particular disease affecting your crepe myrtle and suggest the best course of action to restore its health. Click the link below to be connected with an arborist for more information!
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Most Common Crepe Myrtle Problems
Crepe myrtles can be a perfect selection for smaller landscapes or suburban areas. They are available in all different sizes and colors that are some of the most vibrant blooms of all the trees. From June to August its hard to miss these bright, beautiful blooms. However, they are susceptible to a few different types of diseases and pests:
Powdery Mildew
Powdery Mildew is the most common problems that crepe myrtles carry. The fungus, Erysiphe lagerstroemiae leaves patches of grayish white powder on the leaves and flowers of the tree. If there is enough of the fungi present, the flowers may fail to bloom. This is most common if the tree is in a dark, shady and damp location.
Japanese Beetles
Japanese beetles are about an inch long and are metallic in color. The essentially feed on the foliage and can multiply enough to destroy the entire tree. Eggs are laid in the soil from June through August for them to emerge and start the cycle all over again the following year.
Aphids
Aphids feed on crepe myrtles by sucking the plant sap out of the leaves. They leave behind a liquid called honeydew. If the infestation is large enough, it will cause yellow spots to appear on the leaves and sooty mold fungi to take over.
Cercospora Leaf Spot
The fungus Cercospora usually occurs during warm, humid weather. This fungus appears in yellow spots on the top of the leaves and a greyish color of fungi on the underside of the leaves. This can result in a loss of all the foliation on the trees.
If you have a crepe myrtle in your yard that looks to have Japanese beetles or other threatening insect infestation, give us a call as soon as possible to have one of our ISA certified Arborists out to perform an evaluation on your crepe myrtle problems!
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5 Most Common Crepe Myrtle Problems
Crepe myrtle trees are a local southern favorite for many reasons.
They require a little to no maintenance after installation, and bring a large variety of vibrant colors few other species can actually compete with to your landscape.
However they do bring about a few issues that can be combatted by using a Certified Arborist from North American Tree Service.
If you have noticed a black substance on your leaves, holes drilled in the trunks and limbs, spotting of the leaves, or a white powdery substance on the leaves you could have run into one of the problems listed below.
Powdery Mildew
Powdery mildew is a plant disease caused by a fungus. This is one of the most common diseases contracted by crepe myrtle trees. It contains patches of powdery white or gray growths that tend to cover the leaves and sometimes the branches as well. If your crepe myrtle was planted in a shady area as opposed to a sunny area, it can be especially susceptible to contracting this disease. Humidity is a favorable condition for powdery mildew to grow. To treat this condition, the best thing to do is to move your crepe myrtles to a location that provides more sunlight and less humidity. North American tree service provides tree planting in Lilburn at a low cost. Another option you might consider is a fungicide or a pesticide treatment applied by a professional tree service in Lilburn.
Cercospora Leaf Spot
Cercospora leaf spot typically occurs during periods of humid or moist weather. The result of this infection can cause severe relief drop or defoliation, distorted leaves and more. To help prevent further infection make sure that you are sterilizing your pruning utensils and loppers so that your other crepe myrtles do not become infected with this disease as well. A fungicide can be applied to the crepe myrtle to effectively prevent and treat this disease.
Japanese beetles On Crepe Myrtle Trees
Japanese beetles are pretty easy to identify as they carry a very distinct metallic greenish/blue head. Crepe myrtles are definitely a favorite for Japanese beetles and they tend to feed on all of the foliage and flowers. Japanese beetles can spread quickly as they lay up to 1000 eggs per period. Younger crepe myrtles are especially susceptible to Japanese beetle infestation‘s. If you suspect your crepe myrtle has a Japanese beetle infestation it is very important to contact a professional tree service with a certified Arborist and Lilburn to address the situation properly.
Asian Ambrosia Beetles
If you have noticed tiny holes drilled throughout the trunk of your crepe myrtle tree, you most likely have an infestation of Asian Ambrosia Beetles. These beetles bore into the trunk and branches to deposit eggs into your crepe myrtle tree. However, crepe myrtles are not the only type of tree that Ambrosia Beetles will fit on, so it is very important to have your trees assessed by a certified arborist in Lilburn to properly identify and treat the infestation before it becomes fatal.
Sooty mold
Sooty mold is another type of fungus that tends to affect crepe myrtles. If you have noticed a black moldy substance that is spotty and covers the leaves, it is most likely sooty mold. This is a type of black mold and fungi that feeds on the honeydew of a number of different insects. This disease doesn’t necessarily kill your tree, however, it can tend to block the sunlight from the leaves which might cause leaf drop early in the season. Aphids, scales, or leafhoppers are different types of insects to be on the lookout for that may be the cause of the sooty mold. A basic fungicide or pesticide can be treated by a certified arborist in Lilburn for your crepe myrtles.
If you have any further questions about crêpe myrtle care or crepe myrtle diseases and insects, please feel free to give us a call at North American tree service and we would be glad to help you answer all of your questions about your trees. Click the link below to get started with a free estimate by a certified Arborist at North American tree service!