hi thanks for replying. yes apart from that it' fine. I washed it all off with warm water & a sponge. all my other plants seem fine its just this one tree.
I'd just keep an eye on it and see if they return. If it is scale that is! The usual remedy is a bit of methylated spirits on a cotton bud dabbed on them, but you'd need to be sure it's definitely that before doing it. It looks as if it's planted quite deeply - or is it my imagination?
It's a place where beautiful isn't enough of a word....
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Have you got a photo of the whole tree, and is it otherwise healthy and growing well?
The usual remedy is a bit of methylated spirits on a cotton bud dabbed on them, but you'd need to be sure it's definitely that before doing it.
It looks as if it's planted quite deeply - or is it my imagination?
They are tiny.... the white part is typical.
See images in link.
https://www.google.com/search?q=scale+insect+on+acer+tree&client=firefox-b&source=lnms&tbm=isch&sa=X&ved=0ahUKEwj2l_Cgj7LbAhVrAcAKHePVAuYQ_AUICigB&biw=1920&bih=943