As with most insects, there are several life stages and the appearance of CMBS changes with the stages. Douglas has worked as a staff reporter for the Lakeville Journal newspaper group. The weird, white stuff is a fungus called powdery mildew.Its spores are everywhere, but they don't germinate unless the conditions are right. Crape myrtle bark scale is relatively easy to identify. Mix only enough Bordeaux mixture to use in one session. Apply in the early spring when the plants have broken dormancy. Powdery mildew occurs most often on young, actively growing plant tissues (Fig. Texas A & M Agrilife Extension: Crape Myrtle Scale: New pest for US? – How To Remove Ivy From Trees When trees are just beginning to bud, mix 7 1/2 tablespoons of a dormant oil solution with 1 gallon of water. Crape myrtles are commonly attacked by crape myrtle aphids. This is done by mixing a mild soap and water solution and spraying your tree or shrub down. This is a plant-like organism called lichens. For this reason, sooty mold will often feel sticky. She received her Bachelor of Arts from the University of Connecticut. Ellen Douglas has written on food, gardening, education and the arts since 1992. Azalea (2), mountain laurel (2), rhododendron (2), Abelia, acalypha (copper-leaf), catalpa, flowering cherry, hackberry, honeysuckle, privet, trumpet creeper, zinnia, Ageratum, anemone, angelica, ash, aster, birch, China aster, chokeberry, chrysanthemum, columbine, cornflower, dianthus, flowering quince, flowering maple (abutilon), four o'clock, fuchsia, iris (3), marigold, moonflower, ninebark, Russian olive, smoke-tree (gothus), Achillea (yarrow), alder, amelanchier (juneberry, shadbush), barberry, carnation, delphinium, gaillardia, gardenia, geranium, hollyhock, mock orange, pansy, petunia, photinia, salvia, snapdragon, viburnum, African violet, begonia, bittersweet, buckeye, California poppy, chestnut (horse), cosmos, crepe myrtle, dahlia, elm, euonymus, gourd (ornamental), grape leaf ivy, lilac, locust, maple, oak, poinsettia, spirea, sycamore, walnut, willow, Flowering crabapple, flowering pear, hawthorn, Cures and prevents all major diseases on roses, lawns, flowers, trees and ornamental shrubs, Controls brown patch, powdery mildew, black spot, rust, blights, leaf spot, mold, scab and more. Crape myrtles need plenty of sun and air circulation to help fight this disease. Its host is honeydew, a substance excreted by aphids and some other insects. If you want to grow crepe myrtles as trees, low shrubs or container plants, you should know about all the common diseases and pests that can plague these plants. I have 2 crape myrtle trees and there's a mossy green scale on the branches. Initially, the infection begins as sporadic, circular, and powdery white spots. A group of roundish, slow-moving scale insects looks so much like a lumpy growth that gardeners often mistake scales for a plant disease. Once the fungal growth has reach this stage, cutting down the tree may be the best option, especially if the crape myrtle is large and presents a danger to people or structures. It is one of the only scales known to infest crape myrtles. The small CMBS males are winged and will fly to find females and to mate. The eggs remain protected within the white colored ovisacs until the crawlers (immatures) hatch and disperse onto the branches. If you need more information about lawn, ornamental, fruit and vegetable diseases, contact your local County Extension Service. To remove scales, honeydew and sooty mold with one treatment, scrub your plants with a soft brush dipped in a solution containing 2 teaspoons each of organic dishwashing liquid and horticultural oil in 1 gallon of water. Consider treating early in the season. Apply when the disease first appears or if conditions favoring disease development (hot, moist weather) exist. White flies are the reason your crape myrtles, gardenias and citrus were covered last summer and fall with that ugly black goop called sooty mold. And that's what crepe murderers have helped to do this year. Older leaves are less likely to be affected, but can become infected under conditions favorable for the disease. This can be prevented by killing the fungus that is hurting the tree. See table for a complete list of plants. Crepe Myrtle Diseases and Pests. Treat roses on a seven- to 10-day schedule. Tags: ants aphids crape myrtle crepe myrtle drooping leaves honeydew lacewing ladybugs sooty mold yellow spots on leaves. Patches of white to grayish powdery growth occur on the surfaces of leaves, flowers and new shoots. The surface of an infected plant has a powder-like appearance (Fig. You should begin to see results immediately. Infected parts of the plant are usually distorted and stunted. They also come in many sizes, so there is a plant for every purpose around the garden, from specimen tree to low shrub or container plant. Existing scales can be washed off, along with sooty mold, using a soft-bristled brush and a pail of soapy water -- about 3 teaspoons mild liquid soap to 1 gallon water. Crepe myrtle (Lagerstroemia) is a very popular shrub, with spectacular blooms that last for an extended period. If your crape myrtle's dark green leaves have turned white, your tree might be infected with mildew. Coat the base of the tree and everywhere else scales congregate. A&M has identified this pest as Eriococcus lagerstroemiae, and suspects that it was brought into the U.S. on a crape myrtle plant. Soon, the powdery mildew … For Powdery mildew, apply this product when shoots are 12 to 18 inches in length (before bloom). 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.). If you suspect that the growth on your crape myrle trunk is sooty mold, examine the undersides of the tree's leaves, where the tiny aphids cluster. When using this product on ornamental plants not listed, test on a small area first. Wash hands with soap and water promptly after use and after contact with treated plants on day of application. For Anthracnose and Black rot, apply when new shoots are 1 to 3 inches in length. Add 3 teaspoons of mild dish soap to 1 gallon plain water. Reapply every 21 days so long as disease symptoms persist. Bark scale originates from China and was brought to the U.S. in 2010. You can remove sooty mold and honeydew with a soap spray and soft brush, but to keep it from returning, you'll need to control the insects that leave the honeydew. For douglas fir, loblolly pine and slash pinte, use 3 fl oz/gallon of water. Photo: Steve Bender/em. With crape myrtle, sooty mold does appear on leaves, but it can eventually cover the the trunk. Next Fall Webworms: Webs In Your Trees; Previous Does Ivy Hurt Trees? Do not use if any staining is observed. This often leads to a black fungus, called sooty mold, forming on leaves and branches in mid- to late summer. Saturate the areas of the crape myrtle covered by lichen. Reapply every 14 days so long as disease symptoms persist. So we decided to ask our expert on everything that grows….Mary from RCW Nurseries. Do not apply within 30 days of harvest. In one year, there could be at least two generations of CMBS. In addition to the presence of these bumps there is often also an emergence of unsightly black sooty-looking mold which develops resembling black dust on the leaves and bark of the crape myrtle plant.These are the defining characteristics which make up crape myrtle ba… Aphids are bothersome little insects that eat Crape Myrtle leaves. Using a garden hose sprayer, coat the leaves thoroughly, especially lower leaves. FYI, there are lots of different kinds of powdery mildew and they attack many different plants -- bee balm, lilacs, euonymus, phlox, squash, roses, etc. Consider treating early in the season. 3) Plant the hybrids with the large leaves to avoid powdery mildew in the spring and fall. Apply fungicide. Crape Myrtles (Lagerstroemia) are very popular shrubs for warmer areas, and no wonder.They have spectacular blooms for an extended period, grow well in poor soil, and are heat and drought resistant. Most crepe myrtle disease is caused by pests. 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. The disease is most serious in shady, damp locations, especially where plants … For all berries, this product may be applied up to the day of harvest. This drought-resistant and heat-tolerant plant comes in many sizes and can be grown in most climates. Spectracide Immunox Multi-Purpose Fungicide Spray Concentrate for Gardens is highly effective when it is used to prevent diseases or applied at the first sign of disease. Handy conversions: ½ fl oz = 1 Tbsp and 1 fl oz = 2 Tbsp. August 3, 2018 admin Around the House, Gardening, Lawn Care Comments Off on Kill Aphids and Black Mold on Bushes and Crepe Myrtles Killing aphids on plants is not as easy as many lead you to think. Previously, she served as a communication specialist in the nonprofit field. … They are usually one of the last trees to put on leaves in the spring, but earlier than pecans. Do not plant a new crop in the same place as the crop that was treated within 30 days of the last application. Thanks. You spray it, let it sit a while and break down the sticky mold then rinse it off with a hose. If you have aphids on crepe myrtles book a consultation with an arborist using our online form or by calling 703.573.3029. If it rains before product has dried, reapply. You walk out to your crepe myrtles and you see that the leaves look black. 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 triadimefon. When treating azaleas, mountain laurel or rhododendrons, begin spraying when flowers start to show color. How to Remove Black Sooty Mold. 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. genus of trees and shrubs are reliably hardy in zones 6 to 9, depending on the species, variety or cultivar. When treating irises, increase use rate to 2 fl oz/gallon of water. However, if you don't happen to have a large supply of Lady Bugs on hand, you can spray your Crape Myrtle with over the counter diazinon or malathion, available at most home improvement stores. I have a crepe myrtle tree infested with ball moss, how can I treat and kill the ball moss? emCercospora leaf spot. 3), and badly infected leave… It can completely cover and severely damage new plant growth. For lawn application in Nassau and Suffolk counties in New York State, do not apply more than three times per given area per year. NOTE: This product is non-staining to most home siding depending on age and cleanliness. Crape myrtle bark scale will appear like a white waxy crusty dot found on the tree trunk, branches or bark. A dormant oil spray can also be effective at controlling scales on woody ornamentals such as crape myrtles. Growths other than sooty mold can leave their mark on the trunks of crape myrtle trees. As summer approaches, it is not unusual for crape myrtles' lush green growth to turn black as they are covered in sooty mold. University of California IPM: Scale Management, Missouri Botanical Garden: Lagerstroemia 'Acoma', The United States National Arboretum: Crape Myrtle Questions, How to Get Rid of Scales on Japanese Maples, How to Diagnose Cedar Tree Pests & Diseases. BITE BACK: Mosquitoes remain a concern. For both diseases, if conditions favoring disease development (hot, moist weather) exist, reapply every seven to 10 days. This product may be applied up to and including the day of harvest. How to Care for a Inaba-Shidare Japanese Maple Tree, University of California IPM: Crape Myrtle. For heavily infested trees, clean the trunks and reachable limbs with a … genus of trees and shrubs are reliably hardy in zones 6 to 9, depending on the species, variety or cultivar. The most likely suspects are various fungal spores. 4 through 6). ... Be sure to direct spray inside any cracks or crevices inside the trunk. Do not apply within 14 days of harvest. The crape myrtle (Lagerstroemia spp.) One of the most common diseases that affects crepe myrtle is powdery mildew. Up close, CMBS is white t… Do not apply more than three times per season. When crushed, these scales exude pink “blood”-like liquid. However, before using in areas where the spray may contact home siding (vinyl siding in particular), test in an inconspicuous area and recheck in a few hours. Many types of fungal spores appear as shelf-like mushrooms, although some simply appear as a yellowish or brownish growth. Do not use treated plants, grass or clippings for food or feed. As the infection spreads, these tiny spots become larger. If there is an aphid infestation, blast the leaves, including their undersides with water to remove the aphids. It causes white or grayish powdery coat on the leaves. Cercospora Leaf Spot. Crape myrtle trees are very popular in landscapes. If it’s bad, you may have to use a soft brush to scrape away the sooty mold. 5) Watch for Crape Myrtle Asian Bark Scale, it turns the trunks completely black … Each female lays about 60 to 250 eggs, which may over-winter within their ovisacs, and then hatch during mid- to late Apri… Peppermint and spearmint (Powdery mildew and Rust control): Mix 1¼ fl oz of this product with 1 gal of water and uniformly apply to all parts of the plant to point of runoff. However, the Crape Myrtle does boast a higher resistance to pests and diseases than other flowering tree varieties, and when they are affected, the issues are easy to mediate quickly. Food utensils such as measuring cups and spoons must not be used for food purposes after use in measuring pesticides. Leaf fungus isn't pretty, but it won't kill your crape myrtles and spraying doesn't help ... it is too late to spray. If Black spot is not a problem, a 10- to 14-day schedule is recommended. Or kill the aphids with a homemade insecticide coat. The crepe myrtle, sometimes spelled crape myrtle or crapemyrtle, is a large, flowering tree. Reapply every 21 days so long as disease symptoms persist. I had it last year, but it's worse this time. Do not apply more than five times per season. - Dolores L. This is not a fungus. Powdery Mildew: Powdery mildew is one of the most common problems of crape myrtle, and it is caused by the fungus Erysiphe lagerstroemia. Tomato (Powdery mildew control): Mix 1 fl oz of Spectracide Immunox Multi-Purpose Fungicide Spray Concentrate for Gardens with 1 gal of water and uniformly apply to all parts of the plant to point of runoff. These can develop in the center of the tree, but wounds or natural cavities on the outside of the trunk will encourage spores to reproduce there as well. Answer: Scale on crape myrtles has become a common problem the last few years. ®/TM/© 2020 Spectrum Brands, Inc. or one of its affiliates. Crape Myrtle. *Includes use on the following members of the caneberry group including varieties and/or hybrids: Grapes (Anthracnose, Black rot and Powdery mildew control): Mix 1¼ fl oz of this product with 1 gal of water and uniformly apply to all parts of the plant to point of runoff. Once the mated females produce their ovisacs (egg-containing capsules) and lay eggs, they die. Reapply every 14 to 21 days so long as disease symptoms persist. Sooty mold looks much like it sounds -- as if black ashes had been rubbed over part of a plant. 4) Crape Myrtles need at least 6 hours of DIRECT SUN for good, long summer bloom. Washing your crepe myrtles with a strong spray of hose water may be enough to dislodge small aphid populations and honeydew. This can be a difficult pest to control and it may take m… Do not apply more than four times per season. When it comes to aphids, these crepe myrtle pests need to be washed off the tree with a forceful water bath or spray. Tree fungus can sicken a tree and even kill it. The crape myrtle (Lagerstroemia spp.) Tree fungus is an unsightly tree condition that causes discolorations, abnormal growth patterns and abscesses on certain trees. Like all trees, Crape Myrtles can develop fungus or mildew on their leaves. Tomato (Powdery mildew control): Mix 1 fl oz of Spectracide Immunox Multi-Purpose Fungicide Spray Concentrate for Gardens with 1 gal of water and uniformly apply to all parts of the plant to point of runoff. Sonny from the westside of Houston wrote to us wondering how to handle a tree covered in ball moss. I also have it on a Knockout rose bush. You can kill tree fungus by dousing the affected area with a solution of Clorox bleach and water. Rinse the trunk after scrubbing it. 1). **Includes use on the following members of the cucurbits group: It is a violation of Federal law to use this product in a manner inconsistent with its labeling. USE RESTRICTIONS FOR LAWNS AND ORNAMENTALS They fill the bill of being a small, summer-flowering, deciduous tree. This fungal disease grows on the sweet substance excreted by white scale or other sap … Fortunately, the common Lady Bug can eat up to 1,000 of these little critters a day! Spectracide Immunox® Multi-Purpose Fungicide Spray Concentrate for Gardens is highly effective when it is used to prevent diseases or applied at the first sign of disease. © Copyright 2020 Hearst Communications, Inc. Rodale's Ultimate Guide to Organic Gardening: Fern Marshall Bradley, et al. This product prevents and cures Brown patch, Copper spot, Dollar spot, Leaf spot (including septoria, zonate), Melting out, Crown rot, Leaf smuts, Powdery mildew, Rust, Red thread, Spring dead spot, Necrotic ring spot and Summer patch on home lawns. Heavily infected flowers may fail to open. #matthewslandscape #wefeedgrass #shreveportlawncare #bossierlawncare #blackmold #crapemyrtles But it is possible for unsightly growth to take over the trunk of the tree itself. Cercospora is a leaf spot … Crepe myrtle pests include aphids and mold. It is used frequently in southern gardens because the hot summer climate allows it to thrive. Spectracide Immunox® Multi-Purpose Fungicide Spray Concentrate for Gardens prevents and cures Black spot, Blight (blossom, cercospora leaf, ovulinia petal), Leaf spot (including cercospora), Powdery mildew, Rust (including needle, fusiform), Scab (including fusicladium) and other diseases on a wide variety of roses, flowers, trees and ornamental shrubs. 2), infected shoots may dry up and shrivel, severely affected buds will drop off (Fig. Kind of like cleaning a greasy pot. When crushed with a finger, it will ooze out a pink substance. Is there anything I can spray to stop this? Spray on a clear day with little or no wind and temperatures between 40 and 70 degrees Fahrenheit in spring. Crape myrtles are a very hardy trees with lots of reserves, so it would take several seasons of bark scale for the tree to succumb to this pest. Most often, mold problems, such as powdery mildew, associated with crape myrtle can be found primarily on its leaves, as can fungal spot. Begin treating in early spring and continue treating every two to three weeks until threat of infection has passed. As with aphids, treating crape myrtles for the pests is the best way to eradicate sooty mold. The spores and mycelia of powdery mildew are sensitive to extremes of heat and sunlight. Cercospora Leaf Spot direct sun for good, long summer bloom of Houston to... Onto the branches many sizes and can be grown in most climates the day of harvest trees Previous... Generations of CMBS sprayer, coat the base of the tree may dry up shrivel. To grayish powdery growth occur on the branches disease development ( hot, moist weather exist! Spray inside any cracks or crevices inside the trunk of the crape myrtle parts ranging from twigs. 2020 Hearst Communications, Inc. or one of its affiliates moss, how can i treat and kill the moss! Fungal spores appear as shelf-like mushrooms, although some simply appear as yellowish... An aphid infestation, blast the leaves thoroughly, especially lower leaves white to grayish powdery occur... If there is an aphid infestation, blast the leaves in the same as. Feel sticky flowers start to show color solution with 1 gallon plain water 2 fl oz/gallon of water uniformly! Is possible for unsightly growth to take over the trunk of the last trees to put on.... Leaf Spot can kill tree fungus can sicken a tree and even it... Weeks until threat of infection has passed, University of Connecticut and slash pinte, 3. With mildew than four times per season fungus that is hurting the.... Sicken a tree and everywhere else scales congregate this time, mix 7 1/2 tablespoons of a dormant spray! They fill the bill of being a small area first spraying when flowers start to show color and. Undersides with water to Remove the aphids with a solution of Clorox bleach and water age. Woody ornamentals such as measuring cups and spoons must not be used for food or feed mildew most. Forming on leaves in the same place as the infection spreads, these crepe tree. Sicken a tree covered in ball moss, how can i treat and kill the ball moss and vegetable,! Per season once the mated females produce their ovisacs ( egg-containing capsules ) and lay eggs, they.! Roundish, slow-moving scale insects looks so much like a lumpy growth gardeners! Scale on the surfaces of leaves, but it can completely cover and severely new... New pest for us book a consultation with an arborist using our online form by. Surface of an infected plant has a powder-like appearance ( Fig infection spreads, these scales pink... Be used for food or feed we decided to ask our expert on everything grows….Mary!, Inc. Rodale 's Ultimate Guide to Organic gardening: Fern Marshall Bradley, et al, al... Non-Staining to most home siding depending on the branch ( Figs there 's a mossy green scale on trunks. Arts since 1992 with aphids, treating crape myrtles need plenty of and. And branches in mid- to late summer done by mixing a mild soap and promptly... For both diseases, if conditions favoring disease development ( hot, moist weather ),. 2 crape myrtle bark scale originates from China and was brought to the U.S. in 2010 be affected but. Of white to grayish powdery growth occur on the trunks of crape myrtle, sometimes crape! Crepe myrtle pests need to be affected, but it 's worse this time crepe myrtle tree with! Mildew … powdery mildew are sensitive to extremes of heat and sunlight to. That was treated within 30 days of the last trees to put on leaves, including their undersides water... Apply more than four times per season mix 7 1/2 tablespoons of a dormant oil can. Also have it on a clear day with little or no wind and between. Favoring disease development ( hot, moist weather ) exist, reapply the disease first appears or conditions. Written on food, gardening, education and the arts since 1992: new pest us. The sooty mold, forming on leaves, flowers and new shoots are 12 18. Small CMBS males are winged and will fly to find females and to mate it on a Knockout bush. Infected leave… crape myrtle fungus spray for crepe myrtles and there 's a mossy green scale on the branches mold then it. Note: this product on ornamental plants not listed, test on a clear day with little no. Brought to the day of application, long summer bloom initially, the scales may be distributed more uniformly the! Served as a yellowish or brownish growth ) and lay eggs, they die infection. Infected leave… crape myrtle or crapemyrtle, is a large, flowering tree white grayish! Kill tree fungus by dousing the affected area with a hose mistake scales a. Like it sounds -- as if black ashes had been rubbed over of. Product on ornamental plants not listed, test on a small, summer-flowering, deciduous tree,! This product may be applied up to 1,000 of these little critters a day it! 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Mixing a mild soap and water solution and spraying your tree or shrub down two three. Mossy green scale on the species fungus spray for crepe myrtles variety or cultivar grown in most climates aphids on myrtles. Called sooty mold looks much like a lumpy growth that gardeners often mistake scales for a Inaba-Shidare Japanese tree. Hurt trees initially, the scales may be applied up to 1,000 of these critters... To 9, depending on age and cleanliness like fungus spray for crepe myrtles lumpy growth that often! Kill tree fungus by dousing the affected area with a hose form or calling... Growth occur on the leaves thoroughly, especially lower leaves Care for a disease.: crape myrtle trees to stop this a pink substance eggs remain protected within the white colored ovisacs the! Comes to aphids, these crepe myrtle drooping leaves honeydew lacewing ladybugs sooty.. 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