Once early blight is established in the crop, it is very difficult to control. Inspect the crop twice a week for plants with disease symptoms before initiating the fungicide application. It is preferable to plant tomatoes in the dry season when the incidence of early blight is lower. It is better not to have multiple plantings in the same area because old crops will serve as inoculum of early blight for the new plantings. Select plots surrounded by grasslands because they are not a host of this disease.
Irrigation Avoid the use of overhead irrigation.
If overhead irrigation is used, then apply it early in the day to allow time for the crop to dry. Seed quality Use disease-free certified seed. This can be bought from reputable seed merchants. Ensure the seed is in the original seed packet. Seedlings Seed-beds should be distant from old plantings.