Mich. Admin. Code R. 285.623.303

Current through Vol. 24-19, November 1, 2024
Section R. 285.623.303 - Perennial ryegrass (Lolium perenne and Lolium hybridum)

Rule 303.

(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%

Mich. Admin. Code R. 285.623.303

1994 AACS