Have a great day to all! I have a little concern regarding my apple tree, I plant the tree 2 years ago then i noticed a week ago that there are aphids in my apple tree, the texture of the aphids are reddish/brownish in color covered with a cottony-like white wax.I would like to ask how can i control this kind of aphids without using any insecticides, I don't like that the other trees will be infested.Any suggestion will be appreciated.Thank you in advance!