The mold doesn't feed on the foliage. Japanese beetles are another of the crepe myrtle pests that should be mentioned. Symptoms: A white or gray powdery fungus appears on foliage and flowers. The showiest and most tender of the crepe myrtles, displaying huge clusters of white, pink, lavender or purple flowers in June and July. Follow label directions carefully. Turkey tail (Trametes versicolor) is a white fungus that commonly develops on crape myrtles. Infested trees may wilt and die. Water plants from underneath rather than above to keep leaves dry. Individual blossoms reach 3 inches across. Often times, the first sign of CMBS is the black sooty mold on the tree bark. The insects’ digestive systems do not process all of the mat­er­ial they eat. Control: Once beetles are in the tree, no chemical will help. Crepe myrtles have a reputation for growing fast. Prevention is your best … May be frozen to the ground in severe winters in the Upper South, but will resprout. You walk out to your crepe myrtles and you see that the leaves look black. The disease is a white, spongy wood rot, and it invades wounds in crape myrtles. If the fungus spreads to flower buds, the buds may not open. Ask an Expert is made up of groups and individual experts. Is there plenty of sunlight? All crepe myrtles bloom on new wood and should be pruned in winter or early spring. The disease is most serious in shady, damp locations, especially where plants are crowded … It has some kind of green “fungus” growing on it. You can literally wash scale off crape myrtle. CREPE MYRTLE. White powdery spots appear on leaves, stems, and flowers. Control these insects by blasting them of with water or by spraying with horticultural oil, azadirachtin (Neem), malathion, or acephate (Orthene). Pruning off old flowers in summer before they set seed may produce a second wave of blooms. As the infection spreads, these tiny spots become larger. Splashing rain or water may spread the fungus to other plants. It can also look like a thin, dark film or black spots. In several cases, the fungus almost completely covers a leaf's surface. Fungal growth takes place from spring through early fall. Two types of mildew can damage a crepe myrtle and compromise its beauty: powdery mildew, a white fungus that covers the dark green leaves of the plant, and black mold that is the by-product of aphids. Grumpy has his doubts, because the one that gets devoured every year is ‘Sioux.' My father also LOVES mulch, so there is mulch around the crepe myrtle. Hatching females mate before leaving the tree to infest a new host. Almost all selections with names of Native American tribes, such as ‘Hopi,' ‘Miami,' and ‘Zuni,' are mildew resistant. You can use an environmentally safe pesticide or insecticide to wash the tree along with water. The Powdery Mildew pictured here is on a Crepe Myrtle. Spray plants with malathion, horticultural oil, azadirachtin (Neem), or acephate (Orthene) to control insects that secrete honeydew. Round, white spots on upper leaf surfaces expand and merge, covering both sides of leaves. Pruning. Light green leaves to 4 inches long and 2 inches wide turn yellow in fall. Small white flowers are borne in 2- to 4-inch long clusters in early summer; often blooms again in late summer. Control: On small plants, wipe or wash off the molds with a small sponge and water. It hasn’t grown much since last season and didn’t have any new blooms either. Variable in size (some forms are dwarf shrubs, others large shrubs or small trees) and habit (spreading or upright). Resistant to mildew and best known as a parent of hardy, mildew-resistant hybrids with L. indica, though it is handsome in its own right. It causes white or grayish powdery coat on the leaves. The tree is about 20 years old and it is a miniature or a dwarf crepe myrtle. There's plenty to love about them: They grow almost anywhere, are easy to maintain, and are available in all shapes, sizes, and shades. Your plant is just too small to bloom. L. fauriei. This is one of the most common diseases contracted by crepe myrtle trees. Sawdust protruding from holes in branches looks like tiny toothpicks stuck to the bark. Powdery mildew is a filmy, white fungus that grows on leaves and flower buds. You'll probably have to spray more than once. Ants also transfer honeydew-excreting insects from plant to plant. This excretion is called … Tree to 25-30 feet tall, 15-25 feet wide. They fill the bill of being a small, summer-flowering, deciduous tree. Their larvae are complete pests and with enough of these beetles, can destroy a whole tree. Don't chop your large crepe myrtles down to ugly stubs each spring just because your neighbors do. These fungi will not harm your landscape plants. This particular powdery mildew infects only crape myrtle. These unsightly molds are caused by several species of fungi. Is it cold hardy enough? I have not been back to check on the plant yet. The grass growing underneath, combined with the drought last year, could have weakened the plant severely. PLANTING SITE: A sunny location where the air moves freely will help limit powdery mildew and other diseases. 01-01-2020, 03:11 AM Zoisite : Location: British Columbia ~ ☀️ ♥ ♥ ☀️ ~ 9,763 posts, read 8,072,327 times Reputation: 20561. 2), infected shoots may dry up and shrivel, severely affected buds will drop off (Fig. - Dolores L. This is not a fungus. Ants add to the problem by collecting and tending honeydew-excreting insects, such as aphids, scale, and mealybugs. The undigested portion is excreted as a sweet, sticky liquid called honeydew. Grumpy has a theory that the nearly universal planting of crepe myrtles in the South has made it easy for this fungus to spread. Powdery Mildew: Powdery mildew is one of the most common problems of crape myrtle, and it is caused by the fungus Erysiphe lagerstroemia. All of these are safe, natural products available at home and garden centers. Fortunately, this seems to cause no ill effects the next year. Powdery mildew thrives where cool nights follow warm days. You can reduce stress on plants by making sure they are watered correctly, fertilized annually, and kept free of disease. ‘Dynamite,' ‘Early Bird,' ‘Pink Velour,' and ‘Red Rocket' resist it too. The trendy haircuts you’ll be seeing everywhere next year. More than one sooty mold fungus may appear on the same plant at the same time, feeding on the honeydew of numerous insects. What happens is that in mid- to late summer, angular, brown spots form on the oldest leaves. Is there anything I can spray to stop this? Hold up the flowers will gradually wash away from plant to plant begins grow... 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