United Kingdom 
My camellia has a black sootie looking residue on the leaves could you tell me what it is and how to get rid of it thank you.
15 Apr, 2011
Answers
The black sooty deposit is from scale insects on the underside of the leaves above. You can wipe the sooty stuff off to make it look better and use an insecticide on the insects or if your are an organic gardener your usual way of getting rid of bugs. The scale insects need to be got rid of to stop the sooty mould.
16 Apr, 2011
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Sooty mould. Wipe it off, or spray with a suitable fungicide. I use 1 part full cream milk to 9 parts water, seems to work.
15 Apr, 2011