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Gardening Know How Questions & Answers - https://questions.gardeningknowhow.comI have 5 crepe myrtle trees, which have a white powdery substance on them. After a short time, a black substance appears on the leaves. I have had this problem for a couple of years and have sprayed them with several different things, but nothing seems to get rid of it. Any suggestions?
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[1] https://www.gardeningknowhow.com/plant-problems/disease/get-the-cure-for-powdery-mildew.htm: https://www.gardeningknowhow.com/plant-problems/disease/get-the-cure-for-powdery-mildew.htm
[2] https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm
[3] https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm: https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm
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1 Comment To "Crepe Myrtle Problem"
#1 Comment By Nikki On 05/11/2014 @ 10:26 am
The white powdery substance is powdery mildew and can be treated with neem oil. Here is more info: https://www.gardeningknowhow.com/plant-problems/disease/get-the-cure-for-powdery-mildew.htm [1], https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm [2] The black substance sounds like a sooty mold issue, most often brought on by pests. Neem oil can also be used to get rid of the pests as well as the fungus This article will help: https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm [3]