Black Growth on Leaves

My gardenia plant and grapefruit tree have a black growth covering the leaves. What is it?

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1 Comment To "Black Growth on Leaves"

#1 Comment By Nikki On 03/08/2011 @ 8:16 am

Your problem could be attributed to sooty mold, which is often caused by pests. This article will help you learn more:
https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm ^[1]

You can treat this with neem oil. It gets rid of both the fungus and the pests that cause the fungus. Here is more info on neem oil:
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm ^[2]

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

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