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By Mosely

United Kingdom Gb

I have white spots on the trunk and bark of my acer, any ideas



What type of Acer? Many varieties have bark with white markings as part of their ornamental features....could you supply a pic perhaps?

26 Jun, 2010


Im not sure what type of Acer it is but Ihave had it for 8 years and this is the first time I have seen this, on closer inspection the white is a pasty substance and there is brown lumps on some of the white stuff.

26 Jun, 2010


That sounds like Scale Insects - they are small sap-suckers that create a brown "scale" as a protective shield with fluffy white substance beneath and behind the scale, quite common on the trunks of Acers and other trees, particularly in Urban & suburban areas. Once they have attached to a plant they cannot move so if you only have a small-ish number just rub them off with a soapy sponge, being careful to collect them in a pot/bowl etc - the white bits contain egg masses too, so try to get as many as you can.

They are highly resistant to most insecticides, but can be killed with fatty-acid based sprays if you have a very large infestation.

26 Jun, 2010


Thankyou I will give it a go,


26 Jun, 2010

How do I say thanks?

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