Hello,

The symptoms that your images are describing on your peach tree, such as brown and wilted leaves and mummified fruit, suggest that it might be affected by Brown Rot. Brown Rot is a common and serious disease caused by the fungus Monilinia fructicola. It can infect flowers, shoots, and fruits, leading to the wilting of flowers, cankers on shoots, and rotting of fruits which eventually turn into mummies.

Here’s how you can treat and manage Brown Rot:

Sanitation: Remove all dead branches, mummified fruit from the trees, and plant debris from the ground.

Pruning: During the winter, prune out all cankerous parts of the tree.

Fungicide Application: Apply fungicides during full bloom and two subsequent sprays at 10 to 14-day intervals to prevent infections of flowers and young fruit. Additional sprays are required when the fruit ripens, typically in 7-day intervals until harvest.

Fungicide Selection: Choose a fungicide containing captan or propiconazole that is labeled for use on peaches. Ensure complete and thorough coverage of the tree(s) when applying.

Always follow the label directions when using pesticides, and consider the pre-harvest interval, which is the time between spraying and harvesting.

Everything I mentioned above is referenced at this link:

American Brown Rot (msu.edu)

Look at this link too:

Guidelines for Safe and Effective Pesticide Use (msu.edu)

BEFORE YOU DO ANY OF THE TREATMENTS I MENTIONED ABOVE:

I recommend that you get a confirm and precise identification of the problem, I recommend you send all your images by e-mail to the MSU Plant & Pest Diagnostics Lab. The experts there can also provide you with the best treatment options. Their email is <personal data hidden> - Please include your name – The lab will let you know if they need a sample sent. FYI – The lab may also ask for additional images too.

Their website is at this link:

Plant & Pest Diagnostics (msu.edu)

Their Contact Information is at this link:

Contact Us - Plant & Pest Diagnostics (msu.edu)

This link will explain the details on submitting a sample to MSU Plant & Pest Diagnostics Lab:

Submit Samples - Plant & Pest Diagnostics (msu.edu)

I hope this helps