Diseased Tree Azalea

We have tree azaleas that the branches are turning black color with a black powder residue that falls to the ground. There are also white looking (I think) powdery spots on the branches. Is this treatable?

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1 Comment To "Diseased Tree Azalea"

#1 Comment By Nikki On 04/30/2011 @ 10:01 am

This is sooty mold, usually caused by pests–in this case probably azalea bark scale. Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/shrubs/azalea/azalea-bark-scale.htm ^[1]

I would treat the shrubs with neem oil, which should take care of the sooty mold as well as the pest. Here is more info: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm ^[2]
https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm ^[3]

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URLs in this post:

[1] https://www.gardeningknowhow.com/ornamental/shrubs/azalea/azalea-bark-scale.htm: https://www.gardeningknowhow.com/ornamental/shrubs/azalea/azalea-bark-scale.htm

[2] https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/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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