Heavily infected flowers may fail to open. Otherwise, prune sparingly to maintain the tree's natural shape. As the aphid feeds, it injects saliva into the leaf. This article covers the topic of controlling Crepe Myrtle (also spelled Crepemyrtle, Crapemyrtle or Crape Myrtle) bark scale. Although not necessary, sooty mold can be washed from the leaves by spraying foliage with a dish soap solution (4 ounces per gallon of water), waiting three to four minutes, and then rinsing the foliage with a strong stream of water. This often leads to a black fungus, called sooty mold, forming on leaves and branches in mid- to late summer. Also, honeydew production from the bark scale on the leaves which may begin dripping sap down off the leaves. Clemson University Cooperative Extension Service offers its programs to people of all ages, regardless of race, color, gender, religion, national origin, disability, political beliefs, sexual orientation, gender identity, marital or family status and is an equal opportunity employer. Les myrtes à crêpe ( Lagerstroemia indica), aussi appelé myrte de crêpe, offrent tellement de beauté qu'il n'est pas étonnant qu'ils soient les arbustes préférés dans les jardins du Sud.Les pétales - blanc, rose, rouge ou violet - sont fins et délicats, les fleurs sont énormes et belles. Prevention & Treatment: Sooty molds are unsightly, but are relatively harmless, since they do not directly attack the plant. Lichens will gradually disappear if the health of the plant is restored. This crepe tree boasts striking beautiful summer flowers, extremely beautiful fall foliage and is a totally good drought resistant tree. There is an Australian native crepe myrtle (Lagerstroemia archeriana), which grows to around 7m (20′) tall and has pinkish mauve flowers. Crepe Myrtle Bark Scale (or CMBS) is relatively easy to identify in heavy infestations, but can be difficult to notice in its early stages on Crepe Myrtles. Ivy's Flower Garden … QUEEN'S CREPE MYRTLE. 4. Reference to commercial products or trade names is made with the understanding that no discrimination is intended and no endorsement by the Texas AgriLife Extension Service is implied. It winters over in dormant buds and shows small white circles on new leaves when spring arrives. They fill the bill of being a small, summer-flowering, deciduous tree. Find more gardening information on Gardening Know How: Keep up to date with all that's happening in and around the garden. Control these insects by blasting them of with water or by spraying with horticultural oil, azadirachtin (Neem), malathion, or acephate (Orthene). 1 FIG. In addition, many aphids can be removed from plants by spraying with a strong stream of water. If you are noticing one or more of these signs, it is time to consult a professional to save your crepe myrtle. Crepe myrtle bark scale insects make their home on the plant's exfoliating white bark, where they conceal themselves beneath protective wax. As with all pesticides, read and follow all label instructions and precautions. Plant sap has a high sugar content. The plant needs full sun and air circulation. Spray with a neem oil product, insecticidal soap or horticultural oil to control most pests that are infesting crape myrtle trees. Typically, they occur in abundance on plants that are declining in health or vigor. Crepe myrtles come in all different colors and heights, so find the one that's right for you. The same is true of Apalachee, Tonto, Tuscarora and … Scale not going away on Crepe Myrtle . Read on to find our how to plant and grow crape myrtle in your yard. Want to see more Southern Living videos? Insecticides & Fungicides for Crape Myrtle Insect Pest & Disease Control. genus of trees and shrubs are reliably hardy in zones 6 to 9, depending on the species, variety or cultivar. If you are just now spotting the problem, you can clean off the trunk with warm, soapy water to remove the black sooty mold. They are usually one of the last trees to put on leaves in the spring, but earlier than pecans. You can use insecticides and insect traps for controlling … 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 … To treat an existing crepe myrtle with leaf spot disease, prune away and spotty leaves and any branches and limbs that are in close contact with the infected leaves. ‘Catawba,’ ‘Cherokee,’ ‘Seminole’, and ‘Yuma’ have some resistance to powdery mildew. Aphids are bothersome little insects that eat Crape Myrtle leaves. The varieties, ‘Fantasy,’ ‘Tonto,’ ‘Tuscarora,’ ‘Tuskegee,’ and ‘Velma’s Royal Delight,’ have exhibited resistance to Cercospora leaf spot in field trials. 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. In South Carolina, the most important insect pest is the crape myrtle aphid (Sarucallis kahawaluokalani), which is found on the leaves and twigs of crape myrtle. They overwinter (survive the winter) as eggs, which hatch in the spring. When crushed, these scales exude pink “blood”-like liquid. A soil drench will also control aphids, Japanese beetles and other pests. Q: I have a crape myrtle and every year it is covered in a whitish powder. He suggests two treatment options – contact spray or systemic – for landscapers or residents who have identified signs of crape myrtle bark scale based on data. The honeydew serves as food for the sooty mold fungi (Capnodium sp. 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). Repeat applications every 2-3 weeks or as needed, and always read label and instructions before using any control. As the weather cools, the grubs move more deeply into the soil to overwinter. Crepe myrtle diseases are common if the plant it not planted correctly. When it comes to aphids, these crepe myrtle pests need to be washed off the tree with a forceful water bath or spray. Fortunately, the common Lady Bug can eat up to 1,000 of these little critters a day! There is an Australian native crepe myrtle (Lagerstroemia archeriana), which grows to around 7m (20′) tall and has pinkish mauve flowers. We also recommendPivot 10. add a comment . Doc explains how to cure this and what this is. Adult females are felt-like white or gray encrustations that stick to crape myrtle parts ranging from small twigs to large trunks.