Just treat and monitor. – Denise. hlo…can I use insecticides for bark scale. I was going to plant some new boxwoods and perennials in the bed, and put down new mulch & decorative rock. You can use dormant oil between the time the tree loses its … Soil-applied neonicotinoids can suppress it significantly. I was so happy they were doing great. Use enough oil to reach behind loose bark and into cracks and crevices. It is my understanding that these white bugs are exclusive to the crype myrtle, but I wasn’t sure if the Bayer product would affect the roots of any nearby plants in the same bed. Gray bark scale won’t kill crape myrtles, but it can be washed off if you don’t like the look. Good luck to you and we greatly appreciate you reading out blog. As far as treatment goes, we do not feel that the oils, soaps, and washes from other sites work. -Denise. I will make that correction to my blog. I gave them a good pruning. 2014. Bayer Advanced lasts one year and it’s a good preventative. It can improve control of pests such as aphids.Remember, an insecticide application will never kill every individual of a pest population. Has someone experienced a similar situation? Thank you!! I recommend waiting until you notice any scale to treat them. The scale is a sucking insect Both my trees are only 3 feet high. Crepe myrtle bark scale insects make their home on the plant's exfoliating white bark, where they conceal themselves beneath protective wax. Next, apply a systemic drench around the plant. Each female lays about 60 to 250 eggs, which may over-winter within their ovisacs, and then hatch during mid- to late Apri… Yes, the black sooty mold will fade off the back over time. This time of year the chemicals are more easily absorbed up the tree since this is the growing season. CMBS might be found anywhere on crepe myrtles bark, and often appears near pruning sites and branch crotches of more mature wood. Only one has them but I’d replace both to match. Your email address will not be published. Crepe Myrtle Bark Scale (let’s call it CMBS) is a small insect that appears as a white or gray felt-like encrustation. Like most gardeners, I was disappointed to see a new pest attack them in 2004 when an insect that looked very much like a large mealybug moved into the North Dallas suburb of Richardson. If you notice any pink oozing out then they are still alive. Some insect growth regulators (IGR) are recommended for control of other types of scales in woody ornamentals but have not yet been evaluated on CMBS. Crepe Myrtle Bark Scale. 10) or drench (Fig 11). I just heard that number at an educational seminar. This product is a pesticide so it does kill all the insects that are eating on the plant you treat. If the bark is clean, all you can really do now is wait for spring and see how they leaf out. It has been in Tennessee since about 2013. DNA studies are under way to determine its true identity. Is just the opposite. What should you do if you discover crepe myrtle scales on your tree now? Bark scale attacked both our beautiful Crepe Myrtles last year. 4 through 6). Im so disappointed. The crepe myrtle will absorb the insecticide and … is a deciduous shrub or tree that ranges in height from 3-foot dwarves to towering trees of 50 feet. My friends call me the plant serial killer. This will remove many of the female scales and egg masses, making insecticide control more effective. It doesn’t kill the trees, … Although the insect is infesting crape myrtles only in the southeastern United States, its distribution in its native China ranges from Beijing (USDA Cold Hardiness Zone 6) to Guangzhou, Guangdong Province (Cold Hardiness Zone 10). Hi Eric, other products might work, please just always double check the label to make sure it treats scale. How do I get them to look like a tree. Texas A&M Veterinary Medical Diagnostics Laboratory, Texas A&M College of Agrculture and Life Sciences. Apply when crawlers are active and spray to coat the affected area, this is usually spring. In one year, there could be at least two generations of CMBS. Thanks! We lost about 5 shrubs to that illness, shortly after planting them. I am so sorry to hear that you have such an ordeal with the scale. Products containing pyriproxyfen or buprofezin have had good success in scale crawler control. In more southern areas, sooty mold may be mistaken for that of the crape myrtle aphid (Tinocallis kahawaluokalani), a common insect pest in some areas. My question is do I need to wait until my crepe myrtle is completely treated and cured before I continue with the renovation of my bed? Scrub down the trunk of the crapemyrtle with a mild solution of dishwashing soap and water using a long-handled brush to remove both the scale and sooty mold. Really your only organic option is to smash each scale bug individually with some sort of utensil. Crepe Myrtle Bark Scale is caused by an insect that researchers are working to learn more about. You can try taking a soft bristle brush with water to remove the bark scale and the sooty mold. This honeydew turns in to a black sooty mold. It is the job of natural enemies to clean up after and between insecticide applications. <3 - Denise. The scale pictures were taken by my talented photog friend, Lauren. Sometimes the shells take a while to fall off, but the bugs are dead. For crawlers and larvae, you will need a minimum of 3 applications in a 7-10 day rotation using the Bayer 3-in-1. Scale insects can quickly destroy your plants, causing yellowing and dropped leaves. As with most insects, there are several life stages and the appearance of CMBS changes with the stages. Mark that’s awesome to hear, and we are so happy you found our blog helpful and easy to read. In order to save the remainder of our shrubs, we decided that the healthy shrub right next to the infected ones, we would dig up with the infected. No research has been conducted on whether any of the hundreds of crape myrtle cultivars have any natural resistance to this insect. Please read Bayer’s label for application rates needed for your tree, and for additional information. Sometimes the shell stays on for a while even though they are dead. I actually thought it had died over the winter but was super surprised to see it start to sprout little leaves about a month ago! Hi Kathy, so glad you found my blog. To prepare Bordeaux mixture in a quantity suitable for a backpack sprayer, dissolve 1 pound of copper sulfate in 1 gallon of warm water in a plastic bucket. Sugar & Sap is a source for inspiration that covers everything from gardening to crafts, and cooking. Yesterday I was trimming one of the healthy branches from our walkway and discovered a whole new batch of scale. Crape myrtles are also know for their resistance to powdery mildew, and can thrive in the sun and part shade. One cause is underwatering. Ugh! Is the black soot and white scale harmful to pets and humans. – Denise. Of course I would prefer to save them if possible. As they mature they will get fewer shoots off the trunks but the sprouts will still come up. 6. For the back some of the large crape myrtles are the Natchez, Muskogee and Tuscarora. Hi All, I treated my crepe Myrtle with Bayer Advance in the beginning of May. I have already removed the old mulch and liner from the bed, I also cut down some old bushes. Many people who call us describe their trees as covered in white dots, or white cotton like bumps. I love plants. A mask is not needed when cleaning it off and the sooty mold and scale are not harmful to people or animals. 1) of crape myrtles in urban landscapes in and near Texas. Crape myrtle aphids are tiny, only about a 16th of an inch long. Washing will also remove much of the black mold that builds up on the bark of infested trees. Thier is no cure and the infected plants must be destroyed and removed immeditely to hopefully stop the spread to others. We started selling Chinese Photenias because they are resistant to the leaf spot and much hardier. Hi Meg, thanks for your comment. Horticultural oil has not yet been shown to be effective against this insect. Hi Cindy, thanks for your comment. Grayish-white patches on the bark near pruning wounds or in branch crotches hide colonies of the insects. The tree sits at the end of my 20 foot long flower bed. My husband wanted to cut them down but I insisted we wait it out until the next growing season. Scale is easy to treat now that you know what you have. Some people like to match colors and others like a large mixture of colors, so that’s just personal preference. 4 through 6). Bark will be dry but the leaves are the canopy will indicate how healthy the tree is for you. Pamela, Hi Pamela, thanks for your question. Systemic insecticides work very well to control the bark scale, but the timing is most effective when applied in late winter/early spring. To kill the scale we recommend Bayer Advanced Tree and Shrub Protect and Feed Concentrate. Adult females are felt-like white or gray encrustations that stick to crape myrtle parts ranging from small twigs to large trunks. 2) is causing concern because it is spreading fast, and crape myrtles are planted in landscapes throughout the South and in many other parts of the United States (Fig. Slowly over the last 13 years it has moved northward and is now a serious threat to Crepe Myrtles in Hampton Roads. – Denise, How long after I treat the CM W/the Bayer Tree & Shrub does it take to kill the Eriococcus lagerstroemiae. Before buying crape myrtles, inspect the nursery crop carefully for signs of CMBS infestations. Identification •Light or recent infestations: Carefully examine new growth and small twigs. It took a while but they did put out new growth. I went to several local garden centers, asked questions, showed pictures and nobody had a clue. By 2012 it had spread to Ardmore, OK, and Shreveport, LA. Hi Ed, so sorry for the slow reply. 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. Crape Myrtle Bark Scale (CMBS) It is a serious threat southern crape myrtle trees. They will be able to advise you better than I. How and when do I prune them to keep them smaller. The Best Purple Flowering Tree For North Texas, STAY UP TO DATE AND SUBSCRIBE TO OUR MAILING LIST, Bayer Advanced Tree and Shrub Protect and Feed Concentrate, 7 CAN’T MISS SPRING GARDEN TOURS IN DFW | 2020 EDITION. Sites work I want to mention that we could save them if possible going plant! Of an inch long are always constantly monitoring our trees with soap and water some! 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