In crop sown without fungicide, it is worth considering spraying the plants with a fungicide application if the early signs of mildew, especially if it causes yellow. plant The proper use of fungicide to get the maximum output is. During the early stem elongation (Zadoks 31-33) and not more than 5% of the top three leaves are affected by the disease. If the infection is high. Spraying may not be sufficient to control mildew. The application of fungicides leaves are the most in areas with high risk or in regions with high yield or quality expectations.