We had an agronomist working for a seed company recommend we plant a tetraploid annual ryegrass as a cover crop, and as a nurse crop, on some acreage we are baling for hay. This ryegrass is completely taking over the field where it was used as a nurse crop in the fall of 2020. Every winter except this past winter we frost seeded with timothy and orchard to try to fill in the dead spots. I sprayed the field last August with a 1-1/2 qt./acre solution of glyphosate and replanted using only a 50/50 mixture of orchard grass and timothy. The field came up almost entirely in ryegrass again. All the other acreage where we only used the ryegrass as a cover crop to crowd out fescue also is coming up year after year with this ryegrass. The front field, planted with just timothy and orchard, is about 40% ryegrass now. Can you help me with a solution to minimize or rid my acreage of this "annual" ryegrass?