Answer by
jeestes82 (105)
The most common disease and damaging disease is Peach Leaf Curl, its hard to miss because almost all new growth will be very distorted and curled. Eventually leaves will drop off, this will effect the trees ability to produce fruit. Other diseases include, Brown Rot of Stone Fruit, Rust, Powdery Mildew and Black Spot. All can be treated with Fungicides.