Creeping bentgrass (Agrostis stolonifera L.) is a stoloniferous, cool-season perennial grass used predominately on golf course putting greens in temperate regions of the United States. Its use on golf course fairways is increasing steadily as new cultivars possess improved shoot density and disease tolerance. However, due to the aggressive growth habit of bentgrass, it often spreads into surrounding areas of Kentucky bluegrass (Poa pratensis L.) forming unsightly, scattered patches.