Q.Why Are My Peach Tree Leaves Spotted And Now Turning Yellow And Falling Off?
U have 2 peach trees. A blushing star and a red haven. The blushing star is 2 years old and the red haven is 4 years. The blushing star started with reddish purple spots about 3 days ago. With more each day. Now my more mature red haven is starting to get the red spots and leaves are starting to turn yellow and call off. I sprayed with fungicide about 4 days ago. That was the 1st application. We haven’t had a large amount of rain. Weather has been mid to upper 80’s. Located in SC. The first 2 images are of the blushing star and the last 2 darker green leaves are of the red haven tree. Thanks!

Certified GKH Gardening Expert
It sounds like bacterial leaf spot but that is usually on older trees.
https://www.gardeningknowhow.com/edible/fruits/peach/bacterial-spot-on-peach-trees.htm
https://www.gardeningknowhow.com/edible/fruits/peach/common-peach-diseases.htm
https://hgic.clemson.edu/factsheet/peach-diseases/
https://extension.psu.edu/stone-fruit-disease-bacterial-spot