I have a donut peach tree and have not been able to get any fruit from it because large black ants and some other minute bugs invade the tree as soon as the fruit starts to form. Been to the local hardware stores twice and got different solutions that did not work. Also, what is effective in repelling rabits; they won't let my flowers grow and bloom in peace.
Killing Pests on Donut Peach
Certified GKH Gardening Expert
The small bugs are aphids. The ants come because of the aphids. I recommend neem oil for them. I have found it to be very effective. Here is more information to help you:
Here is an article that will help with the rabbits: