My peaches fell off the tree when they were small. My dwarf tree's fruit is falling off as well, but it has black holes in the fruit with what looks like sap coming out of the holes. Can you help me with this problem? Both the trees appear to otherwise look healthy.
Certified GKH Gardening Expert
It could be peach borer. This article should help:
I personally like neem oil as it is also a pesticide but does not hurt bees. Here is more information on it: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm