Crape Myrtle Bark Scale (CMBS) It is a serious threat southern crape myrtle trees. It has been verified in all areas of both the City of Huntsville and Madison County. CMBS might be able to overwinter in the adult female and egg life stages, and crawlers and later stage nymphs have been observed overwintering under the loose bark and in cracks and crevices of crapemyrtles in our area. With 80% mineral oil this product works as a suffocant and will kill the scale and the sooty mold. The have a waxy coating … Crepe Myrtle Bark Scale is a problem that all Crepe Myrtle are likely to get, and although the insect may not kill the plant, the sticky bug and the black mold are an ugly nuisance. Exclusion: The simplest and most effective defense against CMBS is to avoid buying and planting infested crape myrtles. Adult females are felt-like white or gray encrustations that stick to crape myrtle parts ranging from small twigs to large trunks. On new growth and in heavy infestations, the scales may be distributed more uniformly on the branch (Figs. Crepe myrtles that are subjected to poor pruning habits (looking at you crepe myrtle toppers) are more likely to get bad bark problems. Always check the crape myrtles before purchasing! It has been in Tennessee since about 2013. If one has the scale and you purchased them at the nursery, Lowes, or garden center, then they will surely infect the plants in your garden or surrounding area. The crape myrtle bark scale (CMBS) is a felt scale, Eriococcus lagerstroemiae Kuwana (Coccidae), thought to be host-specific mainly to crape myrtle and pomegranate, although we have yet to see any infestations of pomegranate trees in the US. Crape Myrtle Bark Scale is a recent (2004) invasive insect from Asia. Just make sure they are disposed of in a landfill or burned. Crepe Myrtle Bark Scale (let’s call it CMBS) is a small insect that appears as a white or gray felt-like encrustation. Scale insects are herbivores, piercing plant tissues with their mouthparts and remaining in one place, feeding on sap. Female scales produce fluffy white filaments that cover their body. Crape myrtle bark scale is a felt scale related to azalea bark scale and oak eriococcin scale. Treatments will need to be made in the late spring to early fall time to completely control the Crepe Myrtle Bark Scale. Once the mated females produce their ovisacs (egg-containing capsules) and lay eggs, they die. The female’s body shrinks as eggs are pro- duced. You may be first alerted of the presence of the black sooty mold which has devel… Key Features Insect: Adult females produce a white, felt-like sac around their bodies. come in many shapes and sizes, but some now come with a new twist: a tiny insect, native to China, is now infesting these beautiful flowering trees in several southern states.Crape Myrtle Bark Scale (CMBS), first discovered in the Dallas, Texas, area in 2004, is threatening to turn what has traditionally been a perennial favorite with few pests into an unsightly, … All varieties are susceptible to attack by crape myrtle scales, although research is underway to see if some are more so than others. Crape Myrtle Bark Scale (CMBS), like its host, originated in Asia. When crushed, these scales exude pink “blood”-like liquid. Adult females are felt-like white or gray encrustations that stick to crape myrtle parts ranging from small twigs to large trunks. CMBS produce large quantities of honeydew, a sticky substance that gets on the leaves and branches and trunks of the plant and then will usually encourage the development of sooty mold, which will turn dark brown to black over a short amount of time. The problem usually goes unnoticed until plants begin turning black with a fungus called sooty mold when it begins to grow on insect droppings. After hatching, the juvenile crawlers will find a spot and then mature; Two-three … 4. A little insect called the “Crape Myrtle Bark Scale”, or CMBS, is turning out in mass numbers and when they feed on the crape myrtle sap they excrete a sticky substance called honeydew. It’s a small sap-feeding insect that lives on the bark of certain plants, especially crapemyrtle. … The disease has spread from the early 2000s throughout the South, affecting more and more trees. Crapemyrtle bark scales build shells over themselves so normal insecticides won’t kill them. On old growth, the scale insects may be aggregated around pruning wounds or branch crotches, whereas distribution is typically more uniform on new growth where the small, pink juveniles (… They have at least 2 overlapping generations. Plant Selection: Right now, there are no varieties of crape myrtles resistant to the pest. Treat nearby “uninfested” crape myrtles, as well. Slowly over the last 13 years it has moved northward and is now a serious threat to Crepe Myrtles in Hampton Roads. For years, these trees have been “bullet proof” without any major natural insect enemies or diseases. Treat again the following year, even if CMBS is not evident. The late fall to early spring time frame is an easier time to identify whether or not you have a problem, as there are no leaves and blooms to hide the infestations. A soil drench or deep root treatment using a product containing … 3. Female CMBS will then produce the white felt sac, while male CMBS develop wings and fly off searching for mates. Controlling them requires a two-step approach each year. Apply soil-applied systemic treatment only once per year. When crushed, these scales exude pink liquid which apparently is their blood. The eggs remain protected within the white colored ovisacs until the crawlers (immatures) hatch and disperse onto the branches. This can be a difficult pest to control and it may take m… Rake heavy mulch away from tree base before applying soil drenches. Tiny crawlers hatch from the eggs, settle in their new spot, and begin producing white filaments. Based on information from similar plant growth zones in China and observations reported f… The small CMBS males are winged and will fly to find females and to mate. The management practices sometimes … 4 … Eggs are not seen, as females lay approximately 100-300 pink eggs inside their felt-like sac. The eggs hatch into crawlers which are pink, grey, or brown and move around the crape myrtle’s trunk. The crapemyrtle bark scale, Acanthococcus (=Eriococcus) lagerstromiae(Kuwana), was first confirmed in the USA in 2004 in the landscape near Dallas (TX), although it was likely introduced earlier. The mold and the scale both need to be coated in the Horticultural Oil in order to be controlled effectively, so spray the branches, twigs and trunks liberally until dripping. Bark scale originates from China and was brought to the U.S. in 2010. Most infestations begin in the smaller branches and twigs at the top of the tree, making larger specimens harder to initially identify until the bark scale moves lower down the tree. CMBS has only infested Crepe Myrtles in the U.S. so far, but in other parts of the world it has infested other species of plants that we do plant in our area. 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