Dicyclanil is primarily used as a growth regulator in agriculture, specifically for the control of insect pests in rice crops. It disrupts the normal development of insects, particularly lepidopteran larvae such as rice leafrollers and stem borers, by interfering with their metamorphosis. This action prevents larvae from developing into adults, effectively breaking the pest life cycle. Due to its unique mode of action, dicyclanil is valued in integrated pest management programs where resistance management is important. It is often applied as a seed treatment or early in the crop growth cycle to provide prolonged protection during vulnerable stages of rice development. Its systemic nature allows it to be absorbed and distributed within the plant, offering internal protection against feeding larvae.