Hello,

I have a manadarin tree covered with some sort of white scale. I don't know
what it's called. Maybe it's a bug or the waste from a bug. I've attached a
photo to help in identification. Could someone please advise as to what I am
looking at and the best method to get rid of it. I've sprayed the tree twice
with pest oil but this wasn't effective in removing the scale.

Thanks,

Graeme.