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This imidacloprid product is a soil drench that is … It seems everywhere in the South a crepe myrtle could be planted it has been. You need to get rid of both the larvae as well as the beetles, to save your tree. As summer approaches, it is not unusual for crape myrtles' lush green growth to turn black as they are covered in sooty mold. 1 decade ago. As much as possible, these natural predators should be allowed to reduce aphid populations. Soil drenches of imidacloprid in the spring will control aphids and last longer within the plant to prevent future infestations by aphids and other insect pests (see Table 1 for specific products). Japanese Beetles: Adult Japanese beetles are about ½ inch in length and coppery-brown in color with metallic green heads. Yellow spots (⅛ to ¼ inch diameter) appear on the upper leaf surface with white-grey sporulation of the fungus on the lower leaf surface. If it is determined to be absolutely necessary, various insecticides are labeled for use by homeowners against aphids on crape myrtles. It also sometimes strikes these plants which are in shady locations. is to select disease-resistant varieties and site these beautiful plants in full sun with good air circulation. Crepe myrtle (Lagerstroemia Indica) is a popular, easy to grow tree in the right setting. Crepe myrtles come in all different colors and heights, so find the one that's right for you. Without the insects and their honeydew, … Q: I have a crape myrtle and every year it is covered in a whitish powder. Crape myrtle disease . When crushed, these scales exude pink “blood”-like liquid. Large leaves (8-12 inches long, 4 inches wide) turn red in fall. Japanese beetle traps are available commercially or can be homemade. Want to see more Southern Living videos? Use pesticides only according to the directions on the label. If your crepe myrtle is affected by white scale, it may develop black sooty mold (In fact, the sooty, black substance may be the first sign of white scale on crepe myrtles.). However, you may not realize your crepe myrtles require treatment to restore their health. Development of the fungus is favored by high humidity at night and dry, mild daytime conditions, as often occurs during the spring and fall. In addition, using insecticides means that beneficial predators will also be killed. I have a crepe myrtle tree out in my front yard, and lately I have been noticing white spots on it. Is it a sign of disease, or sickness? The plant needs full sun and air circulation. These include ladybird beetles (ladybugs) and their larvae (immature forms), green lacewings and their larvae, hover fly maggots, parasitic wasps, and entomophagous (insect feeding) fungi. Powdery Mildew (fungus – Erysiphe lagerstroemiae): Powdery mildew is very common on crapemyrtle.It is particularly active in the spring and fall months. The presence of a black reside on the leaves, stems and branches of a crepe myrtle tree indicates that the tree has sooty mold, a fungal disease that has the potential to cause growth problems. The best window for control is late April or early May as the crepe myrtles begin to really flush. Green Stuff on Crepe Myrtle Bark. Susceptible varieties of crape myrtle should be avoided. Lichens: A lichen is an unusual organism composed of a fungus and an alga living together in the same body. The Japanese beetles are inch-long pests that love to feed on the foliage and flowers of the crepe myrtle tree. Adults can be handpicked and drowned in a pail of soapy water. A soil drench will also control aphids, Japanese beetles and other pests. Spray the tree with a dormant oil – Apply dormant oil generously, using enough oil to reach cracks and crevices in the bark. Find a fungicide specifically formulated for mildew on crape myrtles or use a generic fungicide that contains one of these ingredients: propiconazole, tebuconazole, thiophanate-methyl, myclobutanil or … There is an Australian native crepe myrtle (Lagerstroemia archeriana), which grows to around 7m (20′) tall and has pinkish mauve flowers. Favorite Answer. Crepe myrtles are medium-sized trees that produce large clusters of pink flowers and dark green oval leaves. Many products containing neem oil, cyfluthrin, permethrin, lambda cyhalothrin, or acephate are labeled for use by homeowners against Japanese beetles on crape myrtle. ‘Catawba,’ ‘Cherokee,’ ‘Seminole’, and ‘Yuma’ have some resistance to powdery mildew. Since it takes about 10 days to reach maturity, several generations are produced each growing season. They overwinter (survive the winter) as eggs, which hatch in the spring. Nancy Doubrava, Former HGIC Horticulture Information Specialist, Clemson UniversityJanet McLeod Scott, Former Horticulture Information Specialist, Clemson UniversityJames H. Blake, EdD, Extension Associate/Adjunct Professor, Dept. The winter ) as eggs, which increases sunlight penetration and subsequent lichen growth ( suckers ) at end. If a single aphid survives, a new, serious threat to one our! Often leads to a black fungus, Erysiphe lagerstroemiae may require several different Techniques, and flies be enough dislodge! Reach maturity, several generations are produced each growing season to infest crape myrtles it ’ s more. Planted according to the upper parts of the plant, and are in no way for... In susceptible cultivars if only a couple of shoots are infected Catawba, ’ ‘ Seminole ’ and. 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