Section 285.623.404. Standards for sod quality certification.

(1) The  seed  lots   that  are  submitted  for   sod  quality certification shall be in compliance with all of the standards established by these rules and with standards that are established in cooperation with the seed-certifying agency.

(2)   Noxious weed and crop and weed analyses shall be based on a 25-gram sample for bluegrass, except that a 10-gram sample is required for a Poa annua search, a 30-gram sample for fine fescue, and a 50-gram sample for ryegrass and tall fescue. Testing shall be discontinued when results of the tests exceed the maximum limits set forth in subrule (3) of this rule.

(3)   Seed standards for Michigan sod quality seed for Kentucky bluegrass, red fescue, chewings fescue, perennial ryegrass, and tall  fescue are as follows:

Minimum               Minimum               Maximum1

Maximum4

Kind                                    Purity                     Germination          Other crop Weed

Perennial ryegrass               98%                       90%                       0.1%2

.02%

Merion Kentucky                95%                       80%                       0.1%3

.02%

bluegrass

Other varieties of                97%                       80%                       0.1%3

.02%

Kentucky bluegrass
Red fescue	98%		90%		0.1%
.02%
Chewings fescue 98%		90%		0.1%		.02%
Tall fescue	98.5%		90%		0.1%

.02%

1   Shall be free of ryegrass, orchardgrass, timothy, bentgrass, big bluegrass, poa trivialis, smooth bromegrass, reed canary grass, tall fescue, and clover. When the base sample is one of these kinds, the species will not be considered a contaminant; for example, ryegrass in ryegrass.

2   Certification fluorescence levels and appropriate calculations will be applied when determining levels of other crops.

3  The maximum other varieties of Kentucky bluegrass allowed is 2.0%; The maximum allowed Canada bluegrass is .02%.

4  Shall be free of all of the following:

(a)   Dock, Rumex spp.

(b)   Chickweed, Cerastium spp. and Stellaria media.

(c)   ) Crabgrass, Digitaria spp.

(d)  Plantain, Plantago spp.

(e)   Black medic, Medicago lupulina.

(f)  Annual bluegrass, Poa annua.

(g)   Velvetgrass, Holcus spp.

(h)   Prohibited noxious weed seeds.

History: 1994 AACS.