Infection is favored by frequent rainfall accompanied by high winds and moderate temperatures. Extended periods of hot, dry weather inhibit disease development. Peach cultivars vary in their susceptibility to bacterial spot, although no variety is immune. Those cultivars showing tolerance to the disease include Redskin, Redhaven, Loring, Candor, Biscoe, Dixired, Sunhaven, Jefferson, and Madison. Most apricot and nectarine cultivars are susceptible to bacterial spot.
Excessive fertilization can predispose peaches to severe bacterial spot infections.
On the other hand, proper fertilization is necessary to maintain tree vigor and to prevent the development of Cytospora canker. Monitoring the fertility needs of trees is best accomplished through soil and leaf analysis.