Magnolia tree pest?

Hi everyone,

Could anyone tell me what this is on the trunk of my Magnolia? Would be grateful.

Tim

 

Looks like some kind of scale insect,I've seen it before but never delved into exactly what.
Just scrape them off.

 

Thanks for that Pete, much appreciated.

 

I have this on my peach tree in the greenhouse. Ants seem to look after these creatures. I also scrape them off. I also use a strong mix of a well know washing up liquid to wash the affected areas. In my case I use ant powder at the base of the tree. They always seem to come back in my case. But I have a very good crop of peaches.