Maleic hydrazide is widely used as a plant growth regulator to control the sprouting of potatoes, onions, and other root crops during storage. It inhibits cell division, which helps extend the shelf life of these crops by preventing unwanted sprouting. In agriculture, it is applied as a foliar spray to suppress the growth of grasses and weeds in non-crop areas, such as along fences or roadways. Additionally, it is used in tobacco cultivation to reduce sucker growth, improving the quality and yield of the tobacco leaves. Its ability to regulate plant growth makes it a valuable tool in managing crop productivity and storage.