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in Problem solving
morning all !! I have a forest flame quite large bush , been very healthy for years !! Over the last few months the leaves have gone black and also some have white spots on the underneath the leaf !! The black stuff is falling on my stone path and discolouring that as well !! Can anyone help ???
There's probably been some aphids on there, and sooty mould is growing on the honeydew left by them. It should wash off if you hose them down gently, getting the underside of the leaves as well as the top surface.
Well thank you what causes this ??
It won't wash down just tried !! Anyone else got any advice ??
You need to add a little fairy liquid to warm water. Gently though so ss not to damage the leaves. A systemic spray in few weks will help prevent this for next year
I too have this sooty mould on my Pieris, I did manage to get some of it off with a damp sponge but my plants are so big I couldn't possibly wipe down all the leaves. Verdon, may I ask what you mean by a systemic spray in a few weeks time?
I would apply a systemic insectide soon...to control the aphids that caused your sooty mould.
you can use a soap...organic...spray during the growing season to control aphids to ensure a clean bush next year