QuestionsHow to growTrees and ShrubsPests and Diseasesblack marks on camillia leaves 0 Vote Up Vote Down Anne Jackson asked 14 years ago I have lots of black sooty marks on my camillia leaves would I need to give it a specific treatment e.g. a wash or feed or what would you recommend please? thanks 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago The black sooty mould is casued by the excretions of scale insects on the leaves above. Spray thoroughly with a garden insecticide.