SOOTY MOLD FUNGUS? tips for CITRUS tree disease and treatment 

Never heard it referred to as "black sooty citrus mold" before. Black sooty mold appears on many fruit trees due to the causes explained in this video. One indicator of sooty mold or the danger of its onset is ants crawling on your trees. Ants "farm" aphids to consume the honeydew that they excrete and will defend them from predator insects like ladybugs.

You should look at asprin as a plant protector, mainly for mildew. It has also been shown to produce more harvest. As always epsom salts for citrus is highly important

Do you have a different treatment for this?

Thanks eabeH. I sprayed just now on my naartjie, lime and lemon.

How do you know it is dead . Do you spray it after it is dead to remove it