Follow the directions on the label with care. Thorough mixing is important. Apply insecticides to the seed just before planting or mix them with seed in the planter box. Use a wooden paddle to mix the chemicals and seed. Rotate corn with other crops to help prevent disease buildup .
Rotation is particularly important when reduced tillage is practised.
Plowing under of chopped corn stalks and leaves helps to kill overwintering disease fungi, and European corn borer. Maintaining high soil fertility, good soil structure, and good drainage. Leaf Blights Northern leaf blight and leaf spot sometimes appear, especially on lower leaves. Both diseases are favoured by moderate temperatures, long dew periods, and rain. Most recommended hybrids have good resistance.