peach trees dying

Question

What would make the leaves start falling off of a peach tree that has peaches on it? The peaches are still growing but the leaves are dying out.

Answer 1

Some leaves will yellow and drop off the tree normally, as they age.

If the issue is more severe, you will need to investigate a bit further.
Are there any marks, spots, color changes on the leaves?
Any cracks, markings, soft spots on the branches or trunk?

Any signs of insects?

Here is a link that has information on the most common diseases of Peach Trees.

https://www.gardeningknowhow.com/edible/fruits/peach/common-peach-diseases.htm