Section 285.623.303. Perennial ryegrass (Lolium perenne and Lolium hybridum).

(1) Land shall not have grown, or have been seeded to, any other variety of perennial ryegrass during the previous 5 years to be eligible to produce foundation seed. Land shall not have grown, or have been seeded to, any other variety of perennial ryegrass  during  the previous 2 years to produce certified seed unless the seed is of the  same variety and class and is certified.

(2)  Perennial ryegrass shall be planted in distinct rows.

(3)   Limitations on the age of stand and pedigree classes of seed through which a variety may be multiplied shall be specified by the originator, but shall not exceed the limitations  that  are established by the certifying agency.

(4)   Field standards for perennial ryegrass seed are as follows:

Classes of Seed

Factor                                                 Foundation            Certified Other varieties (maximum)                                                        none                       1.0% Isolation1, 2, 3

Less than 5 acres (minimum)                             2,640 feet              330 feet

More than 5 acres (minimum)                           900 feet   165 feet

1   This distance shall be maintained from all varieties of ryegrass. Diploid ryegrass varieties need not be isolated from tetraploid ryegrass varieties, except for a distance of 15 feet to prevent mechanical mixture.

2   Fields that are used to produce foundation perennial ryegrass seed shall be isolated a minimum distance of 330 feet from tall fescue.

3  See R 285.623.302 - Isolation.

(5)   Seed standards for perennial ryegrass seed are as follows:

Classes of Seed

Factor                                                 Foundation            Certified Total ryegrass (minimum)                                          97.0%                    97.0%

Other ryegrass (maximum)                                0.1%                      3.0% Crop other than ryegrass (maximum)                                          0.1%                      0.5%

Total other crop including other

ryegrass (maximum)                                        0.2%                      3.5%

Inert matter (maximum)                     3.0%                      3.0%

Weed seed (maximum)                                     0.15%                    0.5% Prohibited noxious weeds (maximum)                               none                       none Restricted  noxious  weeds  and

St. Johnswart,  docks,  sheep

sorrel, bedstraw (maximum)                            27 per pound         45 per pound

Germination (minimum)                                                   85.0%

History: 1994 AACS.