Cyromazine is primarily used as an insect growth regulator in agricultural and veterinary settings. It is effective in controlling fly populations, especially in livestock facilities, by interfering with the development of larvae. When applied to manure or breeding sites, it prevents maggots from maturing into adult flies, thus breaking the reproductive cycle. It is commonly used in poultry farms, cattle operations, and waste management areas. Due to its targeted mode of action, it has low toxicity to mammals and birds, making it a safer option for integrated pest management programs. It is also used in some horticultural applications to control leafminers and other dipteran pests.