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Gardening Know How Questions & Answers - https://questions.gardeningknowhow.comOld growth on holly bushes have a black substance on top and white powdery nodules on underside. The leaves are falling off but new growth is coming out on top. What is disease? What do I do with bushes?
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URLs in this post:
[1] 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
[2] https://www.gardeningknowhow.com/problems/get-the-cure-for-powdery-mildew.htm: https://www.gardeningknowhow.com/problems/get-the-cure-for-powdery-mildew.htm
[3] https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
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1 Comment To "What Is Disease on Holly Bushes"
#1 Comment By Nikki On 06/06/2011 @ 10:46 am
This sounds like sooty mold. Sooty mold is normally a result of a pest infestation, and the most likely in your case. Powdery mildew is caused by fungus that attack holly leaves, sometimes covering them entirely with a thin white powdery coating. These articles will help: https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm [1]
https://www.gardeningknowhow.com/problems/get-the-cure-for-powdery-mildew.htm [2]
Neem oil can be used to treat both the pests as well as the fungus. Here is more information: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm [3]