Hi everyone
I have a little lemon tree that I have had for about 3 years from a twig (you know what I mean) which i keep in my greenhouse. I brought it out for some sun a few weeks ago and noticed what i thought was soil on the leaves which I figured was dust from the chickens dust bathing in the greenhouse. Today I noticed ants on it and on closer inspection, scale. I assume the ants are attracted by the scale's sticky residue, and the soil (which won't wash off) is a sooty deposit/mould.
Any ideas for treatment? What are its chances?