White spots on my Lychee tree
Im wondering if someone can help me..Im new to growing Lychee trees. I have had them (3 different varieties) for about 1 year and they seem to be growing fine...New leaves forming almost every 2 to 3 months and they have tripled in size. But i have noticed some of them are getting this white powdery stuff on the branches...i can wipe it off with my hands but there seems to be more and more forming...Its not all over the tree but there are a few clusters over some parts of the tree.some on the branch joints and some on the middle of some branches...
I really love my trees and i want them to continue thriving so ant help or advice would be much appreciated..
PS:I live on the Gold coast of Queensland Australia.