The seeds of the crop known as rough bluegrass, Poa trivialis and its known strains, hereinafter referred to as rough bluegrass, is a threat to grass seed production; therefore, a rough bluegrass quarantine is established to prevent the introduction of rough bluegrass into major grass seed production areas, to control seed stocks to be planted for further seed increase, and to assure grass seed growers of a source of seed stock for planting purposes which is tested for presence of rough bluegrass. If grass seed becomes contaminated with rough bluegrass grass seed, there would be a significant economic loss to grass growers in the state.