Spectracide Immunox Multi-Purpose Fungicide Concentrate effectively prevents and cures all major diseases on roses, flowers, ornamental shrubs, lawns, trees, fruits, nuts and vegetables. This concentrated formula creates an invisible barrier that protects plants for up to two weeks, even during rain. Use to control a variety of diseases, from brown patch and powdery mildew to blights, leaf spot and more. Apply early in the season and consider reapplying every two weeks for prolonged protection.