It depends what kind of bugs they are and what kind of tree you are using it on. Certain bugs only go after certain trees, and there are different methods of repelling pests, especially if you want to use the all-natural route.
Gather the bugs in a container with a tight lid. Close the lid and discard in the trash, flush down the drain, or drive them across town and turn them loose there.
Use insecticides.The climate may play a major role.So cut the branches that are affected.Water the tree regularly.After using insecticides leave a day then add manure.