formulations: 80% DF, 80% WDG, 80% WP, 98% Tech Diuron is a general use pesticide. Diuron is a substituted urea Herbicide used to control a wide variety of annual and perennial broadleaf and grassy weeds. Diuron is used to control weeds and mosses on non-crop areas and among many agricultural crops such as fruit, Cotton, sugar cane and legumes. Diuron works by inhibiting photosynthesis.