How Do I Treat Peach Trees That Have a Disease?
I have mature peach trees that have had a disease for the past two seasons. There is sap coming through at the base and on the limbs and also all over the fruit.
Certified GKH Gardening Expert
It could be peach tree borer: https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-borer.htm
The following link will lead to an article discussing peach diseases: https://www.gardeningknowhow.com/edible/fruits/peach/common-peach-diseases.htm
Enter the word peach in either search windows for links to more articles.
When you find what you think is wrong and purchase the product to take care of it, make sure you use the product according to package directions.