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Lemon Trees

Q.black soot? on lemon leaves

Zone 92586 | Anonymous added on September 21, 2019 | Answered

What is the black soot looking substance on my lemon tree leaves?

GKH_Susan

Certified GKH Gardening Expert

Answered on September 22, 2019

Probably sooty mold growing on the honeydew excretions from an insect pest, aphids or scale. The sooty mold is not pathogenic/harmful. Control the insect pest and eventually the sooty mold will clear up.

https://www.gardeningknowhow.com/edible/fruits/citrus/sooty-mold-on-citrus-trees.htm

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Q.black soot? on lemon leaves

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