Control Tips Control with 2 year rotation, good fertility, and foliar fungicides. No truly resistant cultivars are available. Highly susceptible cultivars should be avoided where losses to early blight are expected. Early maturing cultivars are often very susceptible to early blight. The early variety can act as a source of infection for later varieties in adjacent fields.
Fungicides are important in suppressing damage caused by the early blight fungus.
Consult with provincial agricultural representatives for current fungicide recommendations. Fungicide applications should begin just after bloom or at the first sign of infection, whichever is earlier. Disease forecasting models that will lead to more effective timing of fungicide applications are available. Weather data can be used to predict the onset of early blight and the timing for the first fungicide applications.