Prohexadione calcium is widely used in agriculture as a plant growth regulator. It primarily functions by inhibiting gibberellin biosynthesis, which helps in controlling excessive vegetative growth in plants. This leads to improved plant architecture, enhanced resistance to lodging, and better utilization of nutrients. It is particularly effective in cereal crops like wheat and barley, where it promotes stronger stems and reduces the risk of crop damage due to wind or heavy rain. Additionally, it is used in fruit trees, such as apples and pears, to manage tree size and improve fruit quality by ensuring more balanced growth and development. Its application contributes to higher yields and better overall crop performance.