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By Alia262

Warwickshire, United Kingdom Gb

I love my acers but today I found something growing on the bark of two of them. I will try and post a photo to show you. If anyone has any ideas about how to treat this I would be very grateful as my acers are very special to me.


Asked from the GoYpedia acer trees page

Acer Acer2



Cor, that is one of the worst infections of mussel scale insects I can remember ever seeing. You need to do something really urgently of lose the tree.
I have answered this before but I will repeat it for you. The white stuff is a wax which you have to dissolve to kill the insect. So, first wash the tree with a soap solution. Personally I would use a horticultural soft soap, but liiquid soap will do as this is so urgent. Use a scrubbing brush, not too hard bristles and scrub the bark with the soap solution. Experiment with the strength until you find out which gets rid of the things. Then I would spray with Provado if you have it. If not then wipe over the cleaned bark with methylated spirits on a cloth or parafin if nothing else. Then wash the tree with warm water. You may have to repeat this treatment a few times to finally remove them all. Not a nice job, but it is that or dig up the tree and burn it.

2 Jun, 2010


I've not heard of that Ob --- it looks Awful

2 Jun, 2010


never seen an infestation as bad as that either.

2 Jun, 2010


thanks for the tip. I've scrubbed all 3 of them tonight and they look so much better. Will try and get some Provado tomorrow.

2 Jun, 2010

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