Check your soil, it could mean that the soil is too high of the ph factor. Get about a 1/2 gallon of rotten milk and pour that at the base of the peach tree, do that maybe 4 times and it will cure your problem. It should take 1 - 2 months before you see the leaves of the tree greener and the budding of the flowers much brighter. It will not stop the tree from dropping its fruit this year, but will allow the fruit to fully mature next season. -Birdy