Recently i noticed a number of tiny red spots on my apple and plum tree leaves. They are mostly on the plum tree leaves but the apple has quite a few too, I have searched high and low and have no found a good explaination. I guess i could post pictures of the leaves if that helps in identification. Wondering if I need to take any action? They have been planted in the last two weeks and are about seven feet tall.
Thank in advance for your help.