Kasugamycin hydrochloride hydrate is primarily used in agriculture as an effective bactericide and fungicide. It is widely applied to control bacterial and fungal infections in crops such as rice, fruits, and vegetables. The chemical is particularly effective against rice blast, a common fungal disease that significantly impacts rice yields. It works by inhibiting protein synthesis in the pathogens, thereby preventing their growth and spread. Kasugamycin hydrochloride hydrate is often used as a foliar spray, ensuring direct contact with the affected plant parts. Its low toxicity to humans and animals makes it a preferred choice in integrated pest management programs. Additionally, it is used in some regions to treat bacterial diseases in ornamental plants, contributing to healthier and more resilient plant growth.