As a result of research conducted by the Manitoba Forage Seed Association and work that was done in the United States, the plant growth regulator  Parlay™ (trinexapac-ethyl) was registered for use on Perennial Ryegrass seed in Canada. Research demonstrated that the application of Parlay improves harvest efficiency by reducing stock height and limiting lodging which in turn could result in increased seed yield. Presently there is a prairie-wide effort to have Parlay label expanded to include all grass seed crops.  This research studies the results of using two plant growth regulators (Parlay & Manipulator) on Annual Ryegrass, Hybrid Brome and Tall Fescue seed crops.