Get them off your plant with strong jets of hose water or by bringing in hungry ladybugs. ... white crape myrtle can help a walkway or other parts of a … A cold snap may be the culprit. Patches of white to grayish powdery growth occur on the surfaces of leaves, flowers and new shoots. It may be too late in the year to produce much new growth now. As the fungus spreads, it can cause new affected growth to die, with leaves curling and dropping. Plant your tree (Gardenality has great articles on planting and care of your crape myrtles) in a well drained soil and keep it moist not wet.) Any clue as to what's causing this? Dr. Allan Armitage has provided a useful list both of types resistant to Cercospora leaf spot and types susceptible to it. Stay ahead of the game. A nursery planted an 8 ft. Muskogee crape myrtle in my backyard two months ago. These trees do need to be watered daily for the first few weeks after planting, in order to help them establish a good root system. It's powdery mildew, a fungal disease … This is more of an issue for Southern growers, who garden under more extreme conditions in summer. Remember that most ornamental plants are broad-leafed and can be affected by phenoxy herbicides.Click below for more videos on Crape Myrtle:How to Correctly Prune a Crape Myrtle: https://www.youtube.com/watch?v=BONt3__hkKkBeetles on a Crape Myrtle: https://www.youtube.com/watch?v=XWLspwWbXJQCrape Myrtle bark scale: https://www.youtube.com/watch?v=6b8Tvh_JbkYSubscribe now to Family Plot for more gardening videos like these!https://www.youtube.com/channel/UC1yWvD192f3gHZ08_T-k5lQVisit familyplotgarden.com for more information! Published January 28, 2010 By CHRIS BREWER. When the entire plant turns black and appears to be dirty, suspect a pest infestation. Keep tabs on your plants. Next summer, spray according to label directions with a fungicide called Immunox. Growing Tips for Arrowwood Viburnum Shrubs. If only a few branches are failing to leaf out, the problem is likely a disease. If you’re noticing black spots on the leaves of your Crepe Myrtles, your trees are experiencing a disease called Cercospora.. Extreme cases can cause extensive damage. So if you suddenly spot leaves on crepe myrtle turning yellow, you’ll want to figure out quickly what is going on with this versatile plant. Check crape myrtle stems and leaves for bunches of soft-bodied, pear-shaped, insects a little bigger than the head of a pin. Aphids and azalea bark scale feed on the sugars produced by Crepe Myrtles. Crepe myrtles come in all different colors and heights, so find the one that's right for you. These are aphids, which suck sap from leaves and stems of crape myrtles, causing them to curl and turn yellow. Such spots can indicate a Cercospora leaf spot disease, which is caused by a type of fungus (Cercospora lythracearum) and is an entirely different problem. Introducing "One Thing": A New Video Series, Red Rocket: Red flowers; 10 to 15 feet tall. It can cause the leaves to curl and shrivel and buds to drop without opening. The leaves begin turning colors, curling and falling in late September. Inspect them on a daily basis. A: Burned edges of leaves can be caused by several things including too much fertilizer, lack of water, root diseases or too much water. Curl up with a classic! I feed them miracle grow fertilizer diluted in water every 3-4 weeks. The leaves on my crape myrtles have curled up and turned white. Short of growing your bush in a sheltered area (which requires foresight), there is not much that you can do to prevent the problem of browning in this case. Note--no sign of bugs or leaf mold of any kind, so I'm puzzled. Why Are My Houseplant's Leaves Turning Brown? Not all crepe myrtle shrubs are alike. Infected parts of the plant are usually distorted and stunted. There are two types of Crape Myrtle frequently planted; there is Lagerstroemia indica and Lagerstroemia hybrid (indica x fauriei). If the leaves on your crepe myrtles are turning brown you will need to do some sleuthing to determine the cause. If you are seeing brown leaves (or even partially brown leaves) on a crepe myrtle shrub, such as a Natchez crepe myrtle (Lagerstroemia x Natchez), at the end of a dry summer, the problem could be due to drought. Many plant disorders cause leaves to change color, but few cause them to turn black. The Cercospora leaf spots form on crape myrtle and other types of plants due to water drops from rain or irrigation that sit on leaves during hot and humid conditions. I have several different species of plants around the house that seem to have the same problem. Fortunately, there are several powdery mildew-resistant cultivars of crape myrtle. Growing Natchez Crepe Myrtles: Care, Pruning Tips. You can get this at garden centers. Learn how to save a dying transplanted tree and about tree transplant shock recovery. Powdery mildew is the most common crepe myrtle disease. Crape Myrtle (Lagerstroemia indica) requires full sun, well-drained soils and it is drought tolerant. The leaves on a Crepe Myrtle turning black. Too little water in the summer is another cause. A. Overwatering, overfertilization, and poor air circulation can contribute a crape myrtle’s susceptibility to the fungus. Crepe myrtle leaves turning brown—with the whole leaf turning brown or browning along the edges and sometimes accompanied by curling—is different from the emergence of brown spots in the middle of the leaf. If you are seeing brown leaves on your crepe myrtle plant in the spring, it could be due to your area experiencing a cold snap. Phenoxy herbicides are frequently sprayed on lawns to control broadleaf weeds. The insects’ digestive systems do not process all of the mat­er­ial they eat. 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