What on earth is this?

[undercarriage plan]

Found these little darlings all along the underside on the underside of my variagated Cornus.  It looks like woolly aphid, or scale insect?  But they are huge!!  :o :o Any advice greatly received, thanks Lottie

[undercarriage plan]

[beejay]

They are scale insects. I must say that is a pretty spectacular infestation! I dont really know why there is so much of the white stuff.

[lottie187]

Thanks Beejay!  Very proud of my infestation! Only notice it tonight, cleaned them off with white spirit, hope i did the right thing.  Lottie ;D

[tim]

Don't know. Were you thinking of meths for woolly aphid?

[undercarriage plan]

I was going to put meths on , but my neighbour told me that I'd got muddled and I should be doing it with White spirit!! Was I right then?   ???Lottie

[Robert_Brenchley]

I use meth on anything like that as it evaporates so much faster. All these things could potentially damage the plant.

[undercarriage plan]

I'll have a bit more faith in myself next time then!! Plant looks OK, fingers crossed... Lottie