Where are you located. Copper is fungicide. It is not insecticide. Most fruit trees have issues with both diseases and pests. How much pressure depends on where you live. If you include your state and county, others will have a better idea what you are facing.
There are two tutorials on spraying in Guide
A low spray, mostly organic by Scott.
An a synthetic spray by Alan.
For new fruit growers, there is a lot to lesson. Start by reading topics relevant to your fruit trees will help you a great deal.