When resistant varieties are not available, control perennial weeds, plant in large fields, and control aphids. Follow rotations that avoid susceptible crops for as many years as possible. Where present yearly, consider fumigation where crop value warrants the expense. Apply fungicides on a regular schedule, especially for those planned for storage. For future years, use TMV resistance, plant in large fields, control aphid vectors, and eliminate perennial weeds near fields.
Some varieties are resistant to more than one race.
Where present, determine bacterial spot source. If present, Spray weekly with a tank mixture of basic copper plus maneb. Plan to rotate to fields not recently planted to tomatoes or peppers. Powdery mildew has been important in recent years. Some new varieties are being developed with various levels of resistance.