Read about pest & disease control for peach trees in this Stark Bro’s Growing Guide article . The spots have an angular shape and eventually turn bright yellow. Bacterial canker is a component in a disease complex known as Peach Tree Short Life. Trees Varieties which normally have red skin are abnormally bright. The peach tree is relatively short with slender and and supple branches. turn bright yellow in color; spots on lower leaf surface develop orange-red spores . A plum leaf infected with bacterial leaf spot. Bacterial leaf spot of plum, cherry and peach causes small spots and holes in the leaves during summer months. Varieties vary in their susceptibility, but trees tolerate this disease and continue to grow healthy fruit. Peach tree diseases can be caused by fungus, bacteria or virus. . Blisters or longitudinal splits in the twigs, bright yellow angular spots on the upper surface of . lower leaf surfaces that become bright yellow, angular spots from the top and . remaining on the tree contain overwintering structures that allow infection in the . The lesions appear as bright yellow, angular spots on the upper surface of leaves. . This disease typically has been more prevalent on cling varieties of peaches . fungicide treatments may be necessary in spring as soon as the trees leaf out. These diseases make the economic feasibility of stone fruit production dif- ficult if not impossible. . many fungal diseases (except wood diseases) are manageable and do is the spots on the stone, which bear bright margins (Ranković et al.