Was talking to my local nurseryman today and when I discussed peach/nectarine trees he said in our area (western piedmont of NC) peach trees need to be sprayed with fungicide every couple weeks after flowering to get to full fruit. He said that the trees if not sprayed will start to ooze and will drop fruit once they get about 1" in diameter.
Has anyone in my area experienced this, or found a companion planting (guild) that can prevent it without the need to spray? Would really like to put in some of these, but not into wasting time and money if it can't be worked around.
Ah yes, the "need to spray". Better living through chemistry and more profits for the chemical industry.
Healthy fruit trees that live on healthy soil shouldn't need a weekly fix of fungicide. The permaculture solution for this "problem" is to use compost tea to make sure that there is a healthy microbial community on the leaves, blossoms, and new fruit and there isn't an opportunity for pathogenic fungal spores to take advantage of.
There is also the matter of the weather. Dry weather after flowering is much less conducive to the spread of fungal diseases than continuous wet weather. I would encourage you to try peaches the non-chemical way, just get out after every rain and reapply some compost tea or neem oil to stay ahead of any potential fungus issues.