Posted: Sat Jun 26, 2010 6:35 pm . Similarly, you may want to use a pressure washer, which will also remove loose bark that creates a handy hiding place for the pests. Betrachte das infizierte Blattwerk genau, um die kleinen schwarzen sporentragenden Körper zu sehen. 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 typically coats the flower buds (above) and foliage of crape myrtle. The sooty mold will eventually wash off naturally, but can be washed off gently with soap and water on the main trunks … Apply all chemicals according to directions on the label. However, you may not realize your crepe myrtles require treatment to restore their health. Crape myrtle bark scale is a relatively recent pest that is affecting crepe myrtle trees in a growing area across the southeastern United States. genus of trees and shrubs are reliably hardy in zones 6 to 9, depending on the species, variety or cultivar. Large leaves (8-12 inches long, 4 inches wide) turn red in fall. As summer approaches, it is not unusual for crape myrtles' lush green growth to turn black as they are covered in sooty mold. Since it takes about 10 days to reach maturity, several generations are produced each growing season. If you live in the Mid-South, you most likely have a crepe myrtle in your yard or certainly in your neighborhood. The fact that crapemyrtles have the potential for a long flowering period (up to 120 days) in the summer has given rise to the popularity of this plant in our state. oz. Crepe myrtles come in all different colors and heights, so find the one that's right for you. 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. Crape myrtle bark scale; Arkansas Crapemyrtle Database. This will reduce moisture that could lead to fungus. They vary in length from 1/16 to ⅛ inch long. 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. If disease is severe enough to warrant chemical control, select a fungicide containing one of the following: myclobutanil, propiconazole, thiophanate-methyl, or copper-based fungicides (see Table 1 for specific products). For information on this insect pest and control measures, please see HGIC 2015, Crapemyrtle Bark Scale. The disease is most serious in shady, damp locations, especially where plants … All recommendations for pesticide use are for South Carolina only and were legal at the time of publication, but the status of registration and use patterns are subject to change by action of state and federal regulatory agencies. Follow all directions, precautions and restrictions that are listed. You can use dormant oil between the time the tree loses its leaves in fall and before new foliage emerges in spring. Plant sap has a high sugar content. Q: I have a crape myrtle and every year it is covered in a whitish powder. Crape myrtles are commonly attacked by crape myrtle aphids. In addition to crape myrtle, it will feed on nearly three hundred different plant species. If you look closely under the waxy covering, you may notice clusters of pink eggs or tiny nymphs, which are known as “crawlers.” Female pests exude a pinkish liquid when crushed. Grayish-white patches on the bark near pruning wounds or in branch crotches hide colonies of the insects. Buds, branch tips, and flowers can also be affected by feeding. Water is also a big factor, but you should not over water or it will rot. Loading... Unsubscribe from The Garden Peddler? Crape Myrtle Treatments; Learning Center. The amount of resistance may vary from location to location and may depend on particular environmental conditions. Crepey Skin? We also recommendPivot 10. Crepe myrtle aphids reproduce rapidly. James Blake, ©2007 HGIC, Clemson Extension. Japanese Beetle. Plant Resistant Varieties: The extent of resistance to powdery mildew for a particular variety may vary from location to location and may depend on particular conditions occurring in the environment. This type of aphid is species-specific meaning it only feeds on crepe myrtles. Heavily infected flowers may fail to open. 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. The fungal plant disease myrtle rust is an established disease in Victoria and can't be eradicated. Moderator: test99. Page 1 of 1 [ 8 posts ] Previous topic | Next topic : Author Message; charmon711 Post subject: Scale not going away on Crepe Myrtle. Application of dormant oil can safely be repeated while the tree is still dormant. The scales also reproduce on the shrubs, with each female laying dozens of pink eggs. Their feeding on young leaves often causes leaf distortion. Board index » Natural Organic Management and Techniques » Pests & Disease Control Forum. Aphids can be removed from the plant with a strong spray of water. Controlling the insect problem can reduce excessive amounts of sooty mold. The grubs feed on the roots of plants, especially on the roots of grasses. Brown spots on the leaves of your crepe myrtle is most likely a fungus known as leaf spot disease. In Florida the leaf spot disease was severe in 1976, especially on the pink-flowering variety ‘Near East’. Depending on the severity of the disease, you may need to apply fungicides every week or two. This article covers the topic of controlling Crepe Myrtle (also spelled Crepemyrtle, Crapemyrtle or Crape Myrtle) bark scale. Reduce aphid numbers by allowing beneficial insects, such as lady beetles, to inhabit the plant. Spray the tree with a dormant oil – Apply dormant oil generously, using enough oil to reach cracks and crevices in the bark. The presence of Crape Myrtle Bark Scale may not be a severe issue compared to other plant diseases, but it can be detrimental to the productivity of the tree. The honeydew serves as food for the sooty mold fungi (Capnodium sp. 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