Grapefruit Trees

Black Growth on Leaves


Anonymous added on March 7, 2011 | Answered

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


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ANSWERS
Nikki
Certified GKH Gardening Expert
Answered on March 8, 2011

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

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

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