Spray fruit tree?

Do fruit trees need to be sprayed for bugs? I hate having to use any chemicals on things I'll eat but I know that bugs on fruit trees could be pretty bad so the fruit isn't even edible. Is it necessary to spray?
No not necessary for all trees as if any bugs are infected, then only apply the affected area. Chemicals are bringing some diseases like Cancer for human, avoid these chemicals. Researchers have invented these things long back.
Before getting into fruits you can spray some chemicals, but still people hate to eat those fruits.