Japanese Maple issue

Dublin, Ireland

Hi,
I planted my maples 3 years ago & they bloom perfectly every year & have done so again this year but yesterday I noticed something growing up the base of the trunk.
Can anyone tell me what it is & if it's a problem, what I should do??

Thumbnail by Flinzer Thumbnail by Flinzer
Powder Springs, GA(Zone 7b)

you might post these in the insect ID forum.

(Robin) Blissfield, MI(Zone 6a)

Looks like scale to me, I have successfully treated shrubs with dormant oil or neem oil.

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