Mich. Admin. Code R. 285.623.404

Current through Vol. 24-19, November 1, 2024

Section R. 285.623.404 - Standards for sod quality certification

Rule 404.

(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 .02%	95%	80%	0.1%3
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.

Mich. Admin. Code R. 285.623.404

1994 AACS