We never spray but every couple of seasons we have a harvest that is not wormy. A chill winter helps kill the things in the soil that hatch and eat the peaches. One year we planted fennel around the fruit trees. They were so pungent, I think they confused the fruit flies that lay in the peaches. This year I am trialling exclusion bags. I make long roomy bags out of fabric interfacing. Its that stuff that you put inside collars to make them stand stiffer. (the non-iron on kind). I make them big enough to pull over the peach tree branches and I secure with a peg at the end. I'm hoping this will help. I have used individual exclusion bags made out of interfacing or mosquito netting on mangoes, apples, papaya and so forth so hoping for the best on this.
Very interesting, Lori. Let me know how the exclusion bags work out. Fennel grows well here, too. It would be easy to plant.
I am free ranging chickens in the orchard now hoping to stop the cycle. We got a late freeze again this year which eliminated the fruit for the second year in a row. That may help some, too.
I am planning to put some bee hives in, too. So I surely don't want to use any poisons.
CindyH