The crape myrtle aphid (Tinocallis kahawaluokalani) is the most common crape myrtle pest. Mildew is a fungus; the white powder you see is made up of spores. Lagerstroemia species are deciduous shrubs or trees with geographic origins in China, Japan, and other parts of southeast Asia. However, like all plants, Crape Myrtles can experience an occasional insect or mildew problem. All varieties are susceptible to attack by crape myrtle scales, although research is underway to see if some are more so than others. Cool, moist weather encourages these diseases, especially when new leaves are developing. Various leaf spot fungi cause yellow, brown or black dead blotches on crape myrtle leaves. 4 through 6). Our Crape Myrtles have been bred to be Cold Hardy and Disease Resistant. When choosing your crape myrtle, make sure to pay close attention to the plant’s mature height and width and if that fits the look you hope to achieve. You will notice that the flower will not open to its beauty and the growth of the tree is stunned. For more information on crapemyrtles, contact your county Extension office. Breeding programs over the last 30 years have produced superior forms with a wide range of plant sizes and habits; improved flowering, new flower colors, ornamental bark, ornamental foliage, and disease resistance; and increased vigor. Kingwood Garden Center customer, Ronny R, stopped by to find a solution for the unsightly residue on his crepe myrtle trees, which he believed to a fungus. The crepe myrtles are among the most satisfactory of plants for the South: showy summer flowers, attractive bark, and (in many cases) brilliant fall color make them year-round garden performers. List of various diseases cured by Crepe Myrtle. They are pale yellowish-green with black spots on the abdomen. Older leaves are less likely to be affected, but can become infected under conditions favorable for the disease. In Arkansas, the more serious disease is leaf spot which can cause susceptible varieties to be nearly defoliated by late August. One question we are always asked is: How fast do crape myrtles grow? Powdery mildew occurs most often on young, actively growing plant tissues (Fig. On new growth and in heavy infestations, the scales may be distributed more uniformly on the branch (Figs. Remove any poorly placed limbs as needed, but avoid what is commonly known as "crape murder." These common pests must be washed off the plant using a garden hose and an environmentally-friendly insecticide mixed with water. This step will save you backaches and heartaches in the future. These symptoms are only seen on the leaf but if the tree gets this crepe myrtle disease then the flowers and the growth of this crepe myrtle are the affected. This tiny insect feeds on the sap of the crape myrtle and produces a liquid called honeydew, that can often be observed dripping from crape myrtles in the spring. It has very noticeable symptoms which include a white or grayish powdery coating on the leaf surface. In Florida the leaf spot disease was severe in 1976, especially on the pink-flowering variety ‘Near East’. Crapemyrtle Diseases There are two serious and common fungal diseases on crapemyrtle: powdery mildew (Erysiphe lagerstroemiae) and Cercospora leaf spot. Contents inside crepe myrtle can help to protect skin’s health. Thus, the skin health can be maintained. As with most insects, there are several life stages and the appearance of CMBS changes with the stages. The surface of an infected plant has a powder-like appearance (Fig. These bushes flourish in the southeastern United States, where they are very popular due to their ability to withstand the summer heat. 17. When that plant makes it’s comeback, new growth will come from the ground leaving behind seemingly dead tops. Crepe myrtles have a few diseases and insects they are prone to. 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