Diclomezine is primarily used as a fungicide in agriculture to control various fungal diseases in crops. It is particularly effective against rice blast, a common and destructive disease in rice cultivation. The chemical works by inhibiting the growth of fungal pathogens, thereby protecting the plants and ensuring healthier yields. It is often applied as a foliar spray or seed treatment, providing both preventive and curative action. Diclomezine is valued for its efficiency and relatively low toxicity to non-target organisms, making it a preferred choice in integrated pest management systems. Its use helps farmers maintain crop quality and productivity, contributing to food security.