Agriculture and Rural Development - Pesticide and Plant Pest Management Division - Regulation No. 623. Field Seed Certification


Published: 1994

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DEPARTMENT OF AGRICULTURE

PESTICIDE AND PLANT PESTICIDE MANAGEMENT DIVISION

REGULATION NO. 623. FIELD SEED CERTIFICATION

(By authority conferred on the director of the department of agriculture by section 2 of

Act No. 221 of the Public Acts of 1959, as amended, and section 178 of Act No. 380 of

the Public Acts of 1965, as amended, being SS286.72 and 16.278 of the Michigan

Compiled Laws)

PART 1. GENERAL PROVISIONS

R 285.623.101 Designation of seed certifying agency.

Rule 101. The Michigan crop improvement association is designated an official seed-

certifying agency to assist and advise the director of the department of agriculture in

certifying the varietal purity, quality, vitality, and freedom from disease of seeds of

field crops and turfgrass in accordance with these rules and standards.

History: 1994 AACS.

R 285.623.102 Seed origin and list of varieties.

Rule 102. (1) Certified seed shall be the progeny of foundation seed as defined in the

act.

(2) Only properly named and properly described varieties and hybrids shall be

eligible for certification.

History: 1994 AACS.

R 285.623.103 Production of certified seed; restrictions.

Rule 103. (1) If a kind of seed is submitted for certification for which standards have

not been established in these rules, association of official seed-certifying agencies

standards for that kind of seed will be used. These standards are contained in the

AOSCA Certification Handbook, Publication No. 23, June, 1971. The provisions of

this publication are adopted by reference in these rules. The publication may be obtained

from the Association of Official Seed Certifying Agencies, P.O. Box 6311,

Mississippi State, Mississippi 39759, or from the Michigan Department of Agriculture,

P.O. Box 30017, Lansing, Michigan 48909, at a cost as of the time of adoption of these

rules of $30.00.

(2) The production of certified seed of more than 1 variety of a crop on the same farm

shall be based upon approval by the certifying agency.

(3) Certified seed shall not be produced on land that grew any of the following plants

the previous year:

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(a) An inseparable species that has the same growing season, except when summer

fallowing intervenes. When control measures can be applied to eliminate volunteers,

this waiting period may be reduced as determined by the seed-certifying agency.

(b) Plants of another variety of the same species.

(c) Plants of the same variety unless such plants came from certified seed.

History: 1994 AACS.

R 285.623.104 Field conditions.

Rule 104. (1) A field that contains more than an occasional weed which produces seed

that is not readily separable from the crop seed or that contains weed growth that will

impair seed quality or prevent adequate field inspection is ineligible for certification.

Field borders and weedy areas in the field may require mowing before harvest if, in the

judgment of the inspector, such action is necessary.

(2) Crops that are submitted for certification shall be rogued of weeds, other varieties,

and other crop plants by the grower before field inspection.

(3) Crops which show a lack of vigor, a lack of uniformity, or evidence of inadequate

cultural care or which are weedy or are subject to other conditions that are detrimental

to the production of high-quality seed are ineligible for certification.

History: 1994 AACS.

R 285.623.105 Inspections and final certification.

Rule 105. (1) A field inspection shall be performed by the certifying agency when all

of the following can best be determined:

(a) The identity of the variety.

(b) Mixtures.

(c) Weediness.

(d) Disease infection.

(e) Vigor.

(f) Crop quality.

(g) In the case of corn, factors that affect proper pollination. The inspector shall survey

the field sufficiently to evaluate accurately the factors that affect eligibility for

certification.

(2) Seed that is submitted for certification shall be harvested and handled in a

manner that avoids mixtures and shall be stored and conditioned in a place and in a

manner approved by the certifying agency. Storage identification tags shall be affixed to

each storage container of seed that is eligible for certification. The tags shall contain all

of the following information:

(a) Grower's name.

(b) Variety.

(c) Class.

(d) Bin number.

(e) Field number.

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(3) Final certification by the official certifying agency shall be based upon inspection of

a minimum representative sample of 5 pounds of cleaned seed. In the case of small-

seeded legumes, a minimum representative sample of 1 pound of cleaned seed shall be

submitted. The submitted sample of cleaned seed shall be representative of the entire

lot of seed to be offered for sale.

(4) Analysis, examinations, and germination tests of seed shall be conducted in

accordance with the rules of the association of official seed analysts entitled "Rules for

Testing Seed", Volume 12, No. 3, 1988, revised in 1989, 1990, 1991, and 1992. The

rules are adopted by reference in these rules and are available from the Michigan

Department of Agriculture, Laboratory Division, 1615 South Harrison Road, East

Lansing, Michigan 48823, or from the Association of Official Seed Analysts,

Nebraska Crop Improvement Association, 268 Plant Science, IANR-UNL, Lincoln,

Nebraska 68583-0911, at a cost as of the time of adoption of these rules of $30.00.

History: 1994 AACS.

R 285.623.106 Containers and tags.

Rule 106. (1) A bag of seed that is to be offered for sale or sold as certified, registered,

or foundation seed shall be identified as to variety. Seed that is offered for sale or

sold as certified, registered, or foundation seed shall be placed in new bags that have

a 100-pound capacity or less and shall have been inspected, and approved by the

certifying agency. This seed may also be placed in bulk bags that have a 50-bushel

capacity or less and which may be reused if they are constructed so as to be self-cleaning

to prevent contamination by any previous crop residues. Bags shall be sealed pursuant

to instructions that are issued by the certifying agency. Attached to each bag shall be an

official tag that is issued by the official certifying agency. Bags shall be tagged or

labeled pursuant to the provisions of Act No. 329 of the Public Acts of 1965, as

amended, being S286.701 et seq. of the Michigan Compiled Laws, and these rules.

(2) Certified seed containers will be identified with a blue tag which indicates that the

certification standards established in these rules have been met.

(3) Certified seed of field beans, soybeans, and small grains may be identified by a

yellow tag, which indicates that all of the certification standards as established in these

rules have been met, except for the standards for germination. Field bean, soybean,

and small grain seed may be identified with a yellow tag if the minimum germination

is not more than 10 percentage points below the minimum germinations standards for

certified seed established for these crop kinds. The yellow tag shall carry the

following statement on the front panel of the label: "Meets all Michigan certification

standards for certified seed except germination."

(4) All rules for the production, conditioning, and testing of certified seed shall apply to

bulk transactions, except that the seed does not have to be in bags. All of the following

additional requirements shall apply to the bulk sale of certified seed:

(a) All field and seed standards that apply to bagged seed shall also apply to bulk

certified seed.

(b) Certified seed may be sold in bulk only by an approved retail seed facility or by the

processor. Certification is not valid after more than 2 transfers of ownership.

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(c) Bulk certified seed shall move to the consumer or approved bulk retailer by using

serially numbered bulk sales certificates. The seller shall provide copies of these

certificates to the buyer and the certifying agency.

(d) The director shall have the authority to audit all records related to bulk seed at any

time and inspect the facilities of any processor or approved bulk retailer who sells

certified seed in bulk.

(e) It is the seller's responsibility to handle seed in a manner to prevent mixtures and

contamination, supply seed that has been tested and meets all certification requirements,

and determine that the container, bin, or vehicle receiving the bulk certified seed is

clean. If the container, bin, or vehicle is not clean, it shall be noted on the bill of sale.

The seller shall also obtain a representative sample of each load of bulk certified seed

sold and keep this sample at least 1 year after final disposition of the lot.

(f) It shall be the buyer's responsibility to maintain the purity of the seed after it has

been loaded into the buyer's container, bin, or vehicle.

(g) The bulk sales certificate issued by the certifying agency shall take the place of

the certified seed tag. The certificate shall contain labeling information pursuant to the

provisions of Act No. 329 of the Public Acts of 1965, as amended, being S286.701 et

seq. of the Michigan Compiled Laws, and these rules. The buyer shall receive a

certificate for

each load of bulk certified seed.

(h) The processor shall be assessed certification fees for certified seed sold in bulk.

(i) Processor and bulk retail facilities shall be approved before certified seed is

handled in bulk. Before approval, all procedures for receiving, storing, dispensing, and

recordkeeping shall be reviewed by the certifying agency. An applicant shall

demonstrate acceptable procedures for maintaining the purity and identity of bulk

certified seed. Approval may be withheld if an applicant has not provided records or

documentation as required by these rules.

(j) For all bulk certified seed, a separate storage bin shall be available for each

variety that will be sold in bulk. All bins shall be inspected and approved before

receiving any seed. Bins, augers, conveyers, and other equipment shall be cleaned before

the storage or handling of certified seed. Bins shall be clearly and prominently labeled

to indicate that they have been approved and to show the kind and variety of seed. All

bin openings shall be closed to prevent contamination, except when seed is being put into

or removed from the bin.

(k) At the completion of each season (by December 15 for winter crops and by August

1 for all other kinds), the owner or manager of each approved facility shall file a

report of all movements of bulk certified seed. The report shall include the amount of

seed grown or conditioned or purchased for bulk sale and the source of bulk seed,

including the name of the processor, the variety, and the lot number. The report shall

also include the amount of bulk certified seed sold by variety, the lot number, and the

current inventory of seed remaining for each variety and lot.

History: 1994 AACS.

R 285.623.107 Grading and blending.

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Rule 107. (1) Each variety shall be graded so as to conform to screen sizes as

recommended by the official certifying agency and approved by the director of the

department of agriculture.

(2) Two or more lots of certified seed of the same variety, strain, or hybrid may be

blended if previously approved by the official certifying agency. The quality

represented for the blend shall be that of the least desirable lot in the blend, unless 2

unrelated composite samples that are taken by the official certifying agency show the

blend to be uniform.

History: 1994 AACS.

R 285.623.108 Seed from out of state.

Rule 108. Seed which is produced in another state or country and which is sold and

delivered in this state as certified, registered, or foundation shall have been certified

by a legally constituted agency of the state or country of origin in accordance with rules

and standards that are equivalent to those established in these rules. Seed of such origin

that is represented or labeled as registered shall have been produced and certified in

accordance with rules and standards that are equal to or better than the rules and

standards that are established for Michigan certified seed.

History: 1994 AACS.

R 285.623.109 Interagency certification.

Rule 109. If the Michigan crop improvement association participates with another

certifying agency in performing services that are required to certify the same lot or

lots of seed, the standards for such interagency certification shall be the standards

provided in these rules. Seed that is produced and field-inspected in Michigan may be

shipped in bulk for conditioning and final certification by the Michigan crop

improvement association or may be conditioned in Michigan to be shipped out of state

for final certification by the Michigan crop improvement association. This same

certification procedure may be utilized for seed that is shipped into Michigan from a

cooperating state.

History: 1994 AACS.

R 285.623.110 Modification of standards.

Rule 110. The minimum quality standards for foundation and certified seed, other

than the standards that affect genetic purity as established in these rules, may be modified

by the director of the department of agriculture when application of a standard would

threaten the continued normal propagation of a crop variety.

History: 1994 AACS.

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R 285.623.111 Definitions.

Rule 111. As used in these rules:

(a) "Act" means Act No. 221 of the Public Acts of 1959, as amended, being S286.71

et seq. of the Michigan Compiled Laws.

(b) "Field crops" means any agricultural crop that is grown for food, feed, forage,

fiber, or oil.

(c) "Off-type" means any seed or plant that is not a part of the variety because it deviates

from 1 or more of the characteristics of the variety as described and may include any of

the following:

(i) A seed or plant of another variety.

(ii) A seed or plant that is not necessarily any variety.

(iii) A seed or plant that results from cross-pollination by another kind or variety.

(iv) A seed or plant that results from uncontrolled self-pollination during production

of hybrid seed.

(v) Segregates from any seed or plant that are listed in paragraphs (i) to (iv) of this

subdivision.

(d) "Small grains" means any of the following kinds of agricultural seed:

(i) Wheat.

(ii) Oats.

(iii) Barley.

(iv) Rye.

(v) Spelt.

(vi) Triticale.

(e) "Turfgrass" means any agricultural grass that is used primarily for lawn or

ornamental purposes and includes any of the following:

(i) Perennial ryegrasses.

(ii) Fescues.

(iii) Kentucky bluegrasses.

(iv) Annual ryegrasses.

History: 1994 AACS.

R 285.623.199 Rescission.

Rule 199. R 285.623.1 to R 285.623.29 of the Michigan Administrative Code,

appearing on pages 1274, 1276, and 1280 to 1282 of the 1979 Michigan Administrative

Code and pages 217 to 223 of the 1985 Annual Supplement to the Code, are rescinded.

History: 1994 AACS.

PART 2. FIELD CROP STANDARDS

R 285.623.201 Applications for field crop inspection and certification.

Rule 201. An application for field crop inspection and certification shall be made to

the certifying agency on or before the dates specified by the certifying agency.

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History: 1994 AACS.

R 285.623.202 Isolation.

Rule 202. The seed of that portion of a crop which is to be field-inspected and

which is less than 6 feet from an inseparable species, a variety of the same species, or the

same variety grown from noncertified

seed shall not be harvested for certification. An open-pollinated crop shall be in

compliance with the isolations prescribed in this part.

History: 1994 AACS.

R 285.623.203 Field beans; field and seed standards.

Rule 203. (1) Field standards for field bean seed are as follows:

Classes of Seed

Factor Foundation Certified

Other varieties or off-types (maximum) .01% .01%

Inseparable other crops none none

Bacterial bean blight--percent

of plants infected (maximum) 0.001% 0.005%

Anthracnose or common bean mosaic 0.001%

0.005%

(2) Seed standards for field bean seed are as follows:

Classes of Seed

Factor Foundation Certified

Pure seed (minimum) 99.0%

99.0%

Inert matter (maximum) 1.0% 1.0%

Weeds (maximum) none

none

Other crops (maximum) 2 per 100 pounds 5 per 100 pounds

Other varieties or off-types (maximum) (20/cwt)1 (20/cwt)1

Contrasting colored varieties/ off-types

(maximum) (2/cwt) (2/cwt)

Germination (minimum) 85.0%

Badly damaged seed (maximum)2

1.0%

Common bean mosaic virus (maximum) 3.0%

5.0%

Anthracnose or bacterial blight infected

seed (maximum) none

none

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1 Represents .01% for navy beans

2 "Badly damaged" refers to beans that are seriously injured or badly discolored by

frost, weather, disease, insects, or other causes which seriously affect the seed lot.

History: 1994 AACS.

R 285.623.204 Soybeans; field and seed standards.

Rule 204. (1) Field standards for soybean seed are as follows:

Maximum Each Class

Factor Foundation Certified

Other varieties or off-types .05% .1%

Inseparable seed plants:

Corn (with kernels) and others none none

(2) Seed standards for soybean seed are as follows:

Classes of Seed

Factor Foundation Certified

Pure seed (minimum) 98.5%

98.5%

Inert matter (maximum) 1.5% 1.5%

Weeds (maximum) none

none

Other crops (maximum) 1 per 3 pounds 1 per pound

Other varieties or off-types (maximum) 0.1% 0.5%

Germination (minimum) 80.0%

History: 1994 AACS.

R 285.623.205 Small grains and buckwheat; field and seed standards.

Rule 205. (1) Field standards for small grain seed and buckwheat are as follows:

Maximum Each Class

Factor Foundation Certified

Other varieties or off-types .02% .05%

Inseparable other crops1 1 per acre 5 per acre

Bunt none none

Other smuts2 .5% 2.0%

1 Rye, spelt, vetch, and winter barley are not permitted in wheat.

2 Seed from fields that have more than 0.5% other smuts shall be treated with a

fungicide that is approved by the director.

(2) Rye shall be 650 feet from fields that could be a source of contamination.

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(3) Seed standards for small grain seed and buckwheat are as follows:

Classes of Seed

Factor Foundation Certified

Pure seed (minimum)1 99.0% 99.0%

Inert matter (maximum)1 1.0% 1.0%

Weeds (maximum) 2 per pound 2 per pound

Corn cockle, chess, and noxious weeds

(maximum) none none

Other crops - no rye or vetch

allowed (maximum) 1 per 2 pounds 2 per pound

Other varieties or off-types same

crop (maximum) .02% .05%

Germination (minimum) wheat, oats,

barley, or triticale 90.0%

Germination (minimum) rye, spelt,

or buckwheat 80.0%

1 Minimum pure seed percentage of rye or spelt is 98.0%; with inert matter at a

maximum of 2.0%.

History: 1994 AACS.

R 285.623.206 Red clover and alfalfa; field and seed standards.

Rule 206. (1) Red clover or alfalfa seed shall be planted on land on which the same

crop has not been previously grown for a minimum of 5 years for producing foundation

seed and 2 years for producing certified seed. During the year immediately before

seeding, the land shall be in a cultivated crop or fallow and shall be free of volunteer

red clover or alfalfa plants as determined by field inspection. Manure or other

contaminating amendments shall not be applied during the established and productive

life of this stand.

(2) Any portion of a field that is not to be inspected shall be mowed before flowering.

(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 red clover and alfalfa seed are as follows:

Classes of Seed

Factor Foundation Certified

Other varieties or off-types (maximum)none 0.2%

Other crops (maximum) none 1 plant per acre

Isolation (from other red clover or

alfalfa fields respectively)

(minimum) 900 ft. 165 ft.

(5) Seed standards for red clover and alfalfa seed are as follows:

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Classes of Seed

Factor Foundation Certified

Pure seed (minimum) 99.0% 99.0%

Inert matter (maximum) 1.0% 1.0%

Weeds (maximum) 0.15% 0.2%

Prohibited noxious (maximum) none none

Docks, sheep sorrel, and restricted

noxious (maximum) 9 per pound 45 per pound

Other crops (maximum) 18 per pound 0.2%

Sweet clover (maximum) 9 per pound 45 per pound

Other varieties or off-types

(maximum) 0.1% 1.0%

Germination and hard seed (minimum) 85.0%

History: 1994 AACS.

R 285.623.207 Birdsfoot trefoil.

Rule 207. (1) Birdsfoot trefoil seed shall be planted on land on which the same crop

has not been previously grown for a minimum of 5 years for producing foundation seed

and 2 years for producing certified seed. During the year immediately before seeding,

the land shall have been in a cultivated crop or fallow and shall be free of volunteer

birdsfoot trefoil plants as determined by field inspection. Manure or other

contaminating amendments shall not be applied during the established and productive life

of the stand.

(2) Any portion of a field that is not to be inspected shall be mowed before flowering.

(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 birdsfoot trefoil seed are as follows:

Classes of Seed

Foundation

Certified

Less than 5 acres Less than 5 acres

Factor 5 acres or more 5 acres or more

Other varieties or off-types

(maximum) 0.1% 0.1% 0.2% 0.2%

Sweet clover (maximum) none none 1 plant 1 plant

per acre per

acre

Isolation from flowering

plants of other varieties

or uninspected plants

(minimum) 900 feet 600 feet 330 feet 165 feet

Isolation between different

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seed classes of the same

variety (minimum) 225 feet 150 feet 85 feet 45 feet

(5) Seed standards for birdsfoot trefoil seed are as follows:

Classes of Seed

Factor Foundation Certified

Pure seed (minimum) 98.0% 98.0%

Inert matter (maximum) 2.0% 2.0%

Weeds (maximum) 0.1% 0.2%

Prohibited noxious (maximum) none none

Docks, sheep sorrel, and restricted

noxious (maximum) 30 per pound 45 per pound

Other crops (maximum) 0.2% 1.0%

Other varieties or off-types

(maximum) 0.1% 1.0%

Sweet clover (maximum) 15 per pound 45 per pound

Germination (minimum) 80.0%

Germination less hard seed (minimum) 45.0%

History: 1994 AACS.

R 285.623.208 Crownvetch.

Rule 208. (1) Crownvetch seed shall be planted on land on which the same crop has not

been previously grown for a minimum of 5 years for producing foundation seed and 2

years for producing certified seed. During the year immediately before seeding, the land

shall have been in a cultivated crop or fallow and shall be free of volunteer crownvetch

plants as determined by field inspection. Manure or other contaminating amendments

shall not be applied during the established and productive life of the stand.

(2) Any portion of a field that is not to be inspected shall be mowed before flowering.

(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 crownvetch seed are as follows:

Classes of Seed

Foundation

Certified

Less than 5 acres Less than 5 acres

Factor 5 acres or more 5 acres or more

Other varieties or off-types

(maximum) 1 plant 1 plant 5 plants 5 plants

per acre per acre per acre per acre

Sweet clover (maximum) none none 1 plant 1 plant

per acre per acre

Isolation from flowering

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plants of other varieties

or uninspected plants

(minimum) 900 feet 600 feet 330 feet 165 feet

Isolation between different

seed classes of the same

variety (minimum) 225 feet 150 feet 85 feet 45 feet

(5) Seed standards for crownvetch seed are as follows:

Classes of Seed

Factor Foundation Certified

Pure seed (minimum) 98.0%

98.0%

Inert matter (maximum) 2.0% 2.0%

Weeds (maximum) 0.1%

0.5%

Prohibited noxious (maximum) none

none

Restricted noxious (maximum) 27 per pound 45

per pound

Other crops (maximum) 0.2% 1.0%

Sweet clover (maximum) 9 per pound 45 per pound

Other varieties or off-types (maximum) 0.1% 1.0%

Germination (minimum) 65.0%

Germination less hard seed (minimum)

35.0%

History: 1994 AACS.

R 285.623.209 Perennial cross-pollinated grasses (timothy, reed canarygrass,

and orchardgrass).

Rule 209. (1) Timothy, reed canarygrass, and orchardgrass seed for the production of

foundation seed shall be planted where the same species has not been seeded or grown

for at least 5 years.

(2) To be eligible for the production of timothy, reed canarygrass, and orchardgrass

certified seed, a field shall not have grown or been seeded to the same species during the

previous 2 calendar years unless either the crop was of the same variety and the same or

a higher seed class and passed field inspection for certification or had been summer

fallowed for 2 full seasons before seeding to another variety. Fall seeding is

permitted in the second year.

(3) The certifying agency will determine the length of time that fields will be eligible

for certification.

(4) Fields shall be rogued before harvest to remove off-type plants and other grasses or

weeds which have seed that cannot be removed by mechanical means.

(5) Field standards for timothy, reed canarygrass, and orchardgrass seed are as follows:

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Classes of Seed

Factor Foundation Certified

Other varieties 1 none 1:50

Isolation (feet)2 1,320 1653

1Maximum permitted ratio of plants.

2When different classes of seed of the same variety are being grown on the same or

adjacent farms, the isolation requirements may be reduced to 25.0% of these distances.

3(a) For fields that are certifiable except for isolation, the field boundary may be

established by placing permanent 5-foot posts, 90 feet from the offending field, on

either edge of the field. The crop between the newly established boundary lines and

the offending field may be removed after flowering as a separate field. The crop may

be harvested as uncertified seed.

(b) When 2 fields are separated by a natural or permanent barrier, such as a township,

county, state, or federal highway, drainage ditch, or tree or shrub row, the isolation may

consist of a 15-foot strip next to the barrier that can be either destroyed by mowing

after bloom, but before harvest, or harvested as uncertified seed. The barrier shall be

free of headed plants of the crop being inspected.

(6) Seed standards for timothy seed are as follows:

Classes of Seed

Factor Foundation Certified

Pure seed (minimum) 99.0% 99.0%

Total weed seeds (maximum) 0.2% 0.5%

Other crop seeds (maximum) 0.2% 0.5%

Other varieties (maximum) 0.1% 0.5%

Other grasses (maximum) 0.1% 0.2%

Inert matter (maximum) 1.0% 1.0%

Prohibited weed seeds none none

Restricted weed seeds (maximum) 9 per pound 9 per pound

Germination (minimum) 80.0%

(7) Seed standards for reed canarygrass seed are as follows:

Classes of Seed

Factor Foundation Certified

Pure seed (minimum) 96.0% 96.0%

Total weed seeds (maximum) 0.3% 0.5%

Other varieties (maximum) 0.1% 2.0%

Other crop seeds (maximum) 0.2% 2.0%

Inert matter (maximum) 4.0% 4.0%

Prohibited weed seeds none none

Restricted weed seeds (maximum) 9 per pound 9 per pound

Germination (minimum) 75.0%

(8) Seed standards for orchardgrass seed are as follows:

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Classes of Seed

Factor Foundation Certified

Pure seed (minimum) 90.0% 90.0%

Total weed seed (maximum) 0.3% 0.5%

Other varieties (maximum) 0.1% 2.0%

Other crop seeds (maximum) 0.2% 1.0%

Inert matter (maximum) 10.0% 10.0%

Prohibited weed seeds none none

Restricted weed seeds (maximum) 9 per pound 9 per pound

Germination (minimum) 85.0%

History: 1994 AACS.

R 285.623.210 Rape.

Rule 210. (1) Rape shall be planted on land on which the same crop has not been

previously grown for a minimum of 4 years for producing foundation seed and 3

years for producing certified seed.

(2) Fields that produce foundation seed shall have a minimum isolation distance of

1,320 feet from fields of any other variety of the same kind with similar erucic acid

levels or from a noncertified field of the same variety.

(3) Fields that produce certified seed shall have a minimum isolation distance of 660

feet from fields of any other variety of the same kind with similar erucic acid levels or

from a noncertified field of the same variety.

(4) Fields that produce foundation or certified low erucic acid types of rape seed shall

have a minimum isolation distance of 2 miles from high erucic acid types. Likewise,

fields that produce foundation or certified high erucic acid types of rape seed shall

have a minimum isolation distance of 2 miles from low erucic acid types. Low erucic

acid types of rape seed shall have an erucic acid level of 2.0% or less. The required

isolation distance between fields of different classes of the same variety shall be 10 feet.

(5) Field inspections shall be made when the crop is in the flower stage and at any other

time as deemed necessary by the seed-certifying agency.

(6) Field standards for rape seed are as follows:

Maximum Each Class

Factor Foundation Certified

Other varieties or off-types 0.05% 0.2%

Inseparable other crops,

Non-brassicaceae 1 plant per acre 5 plants per acre

Inseparable other,

Brassicaceae spp. None 1 plant per

acre

Blackleg, Leptosphaeria maculans .001% .005%

(7) Seed standards for rape seed are as follows:

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Classes of Seed

Factor Foundation Certified

Pure seed (minimum) 99.0% 99.0%

Inert matter (maximum) 1.0% 1.0%

Prohibited noxious weeds none none

Restricted noxious weeds and other,

Brassicaceae spp. (maximum) 1 per pound 5 per pound

Other weeds (maximum) 5 per pound 15 per pound

Total other crop seed (maximum) 0.05% 0.25%

Other varieties and off-types 0.05% 0.25%

(maximum)

Germination (minimum) 85.0%

(8) All foundation and certified rape seed that is sold in Michigan is required to be

tested by a method which is approved by the director of the department of agriculture and

which is found to be free of virulent strains of blackleg, Leptosphaeria maculans.

These test results shall be stated on the seed label.

(9) The certifying agency shall have the authority to request laboratory results from the

producer for each lot of seed that is eligible for certification. These results shall be

from an approved laboratory and shall indicate the erucic acid and glucosinolate

content of the seed.

(10) All foundation and certified rape seed that is sold in Michigan shall be treated

with an approved fungicide which is effective against seed-borne blackleg,

Leptosphaeria maculans.

History: 1994 AACS.

R 285.623.211 Lupine.

Rule 211. (1) A field shall not be eligible for certification if lupines were grown in the

same field the previous year, unless the previous crop was grown from certified or

foundation seed of the same variety.

(2) Field inspections shall be made when the field is in full bloom.

(3) Lupine fields that produce certified seed shall be isolated by a distance of not less

than 660 feet from fields of any other variety of lupines or fields of the same variety

that are not in compliance with the varietal purity requirements for certification.

(4) Field standards for lupine seed are as follows:

Maximum Each Class

Factor Foundation Certified

Other varieties or off-types 0.02% 0.1%

(5) Seed standards for lupine seed are as follows:

Classes of Seed

Factor Foundation Certified

Pure seed (minimum) 98.0% 98.0%

Other varieties or off-types

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(maximum) 0.1% 0.5%

Other crop seeds (maximum) none 1 per pound

Inert matter (maximum) 2.0% 2.0%

Weed seeds none none

Germination (minimum) 85.0%

History: 1994 AACS.

R 285.623.212 Adzuki beans.

Rule 212. (1) One field inspection will be made before harvest on all fields of adzuki

beans that are eligible for certification.

(2) Stage of inspection - the field inspection shall be made at the time of leaf drop, just

before harvest.

(3) Field standards for adzuki bean seed are as follows:

Maximum Each Class

Factor Foundation Certified

Other variety or off-types (maximum) .05% .5%

Other inseparable crops none none

(4) Seed standards for adzuki bean seed are as follows:

Classes of Seed

Factor Foundation Certified

Pure seed (minimum) 99.0% 99.0%

Inert matter (maximum) 1.0% 1.0%

Weeds (maximum) none none

Other crops (maximum) 1 per 3 pounds 1 per pound

Other varieties or off-types (maximum) .05% .5%

Germination (minimum) 90.0%

History: 1994 AACS.

R 285.623.213 Perennial pea.

Rule 213. (1) Perennial pea seed shall be planted on land on which the same crop has

not been previously grown for a minimum of 5 years for producing foundation seed

and 2 years for producing certified seed. During the year immediately before seeding,

the land shall have been in a cultivated crop or fallow and shall be free of volunteer

perennial pea plants as determined by field inspection. Manure or other contaminating

amendments shall not be applied during the established and productive life of the stand.

(2) Any portion of a field that is not to be inspected shall be mowed before flowering.

(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 pea seed are as follows:

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Classes of Seed

Foundation

Certified

Less than 5 acres Less than 5 acres

Factor 5 acres or more 5 acres or more

Other varieties or 1 plant 1 plant 5 plants 5 plants

off-types (maximum) per acre per acre per acre per acre

Vetch, Vicia spp. None none 1 plant 1

plant

(maximum) per acre per

acre

Isolation from flowering

plants of other varieties

or uninspected plants

(minimum) 900 feet 600 feet 330 feet 165 feet

Isolation between different

seed classes of the same variety

(minimum) 225 feet 150 feet 85 feet 45 feet

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

Classes of Seed

Factor Foundation Certified

Pure seed (minimum) 97.0% 97.0%

Inert matter (maximum) 3.0% 3.0%

Weeds (maximum) 0.1% 0.5%

Prohibited noxious none none

Restricted noxious 27 per pound 45 per pound

Other crops (maximum) 0.1% 0.1%

Vetch, Vicia spp. (maximum) 10 per pound 45 per pound

Other varieties or off-types (maximum) 0.1% 0.1%

Germination (minimum) 60.0%

Germination less hard seed (minimum) 30.0%

History: 1994 AACS.

R 285.623.214 Foundation corn; inbred lines.

Rule 214. (1) An inbred line is a relatively true breeding strain of corn that results

from not less than 5 successive generations of

controlled self-fertilization with selection.

(2) Inbred increase fields shall be isolated by a distance of not less than 825 feet from

other corn of like color or texture and by a distance of not less than 1,320 feet from corn

of a different color or texture.

However, the isolation distances shall not apply when increase is by hand-pollination.

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(3) Inbred lines are eligible for certification when used in the production of

certified hybrids.

(4) Germplasm used in the production of inbred lines shall be obtained from the

Michigan agricultural experiment station and other state agricultural experiment

stations, the United States department of

agriculture, and such other sources that are acceptable to the official certifying agency

and that are approved by the Michigan state university agricultural experiment station

and the director of the department of agriculture.

(5) Fields shall be inspected by the certifying agency not less than 4 times during the

pollinating period. Roguing for off-type plants shall be performed before any pollen

discharge. An inbred field that has more than 0.1% definitely off-type plants or more

than 1.0% of doubtful-type plants shall not be certified.

(6) A seed lot of an inbred line shall not have more than 0.1% definitely off-type

ears or more than 0.2% ears with off-color kernels as determined by an ear inspection or

winter grow out test.

History: 1994 AACS.

R 285.623.215 Foundation corn; single cross hybrids.

Rule 215. (1) A single cross hybrid shall consist of the first generation of a cross

between 2 certified inbred lines.

(2) A single cross crossing field shall be isolated by a distance of not less than 825 feet

from other corn of like color or texture and 1,320 feet from corn of a different color or

texture.

(3) All of the following field inspection standards shall be complied with:

(a) Fields shall be inspected by the certifying agency not less than 4 times during the

pollinating period.

(b) Seed parent plants that are capable of producing viable pollen shall be detasseled.

(c) When 5.0% or more of the seed parent plants in a crossing field have apparently

receptive silks, the field is ineligible for certification if shedders comprise more than

0.5% of the seed parent plants on any 1 inspection or exceed an accumulative total of

more than 1.0% for any 3 consecutive inspections.

(d) A shedder is a seed parent plant that has more than 1 lineal inch of tassel area with

anthers shedding pollen.

(e) One or more seed parent lines growing in the same isolation and having more

than 5.0% apparently receptive silks are ineligible for certification if 1 or more of the

seed parent lines have more than 0.5% shedders, unless the plants in the area that have

excess receptive silks are destroyed.

(f) Roguing for off-type plants shall be performed before the time of pollen discharge.

(g) A crossing field in which more than 0.1% definitely off-type plants or more than

1.0% doubtful-type plants in the pollen parent have shed pollen shall not be certified.

(h) At the time of the last inspection, the seed parent in a crossing field shall not

contain more than 0.1% definitely off-type plants or 1.0% of doubtful-type plants.

(4) A seed lot of a single cross hybrid shall not have more than 0.1% definitely off-

type ears or more than 0.2% ears with off-color kernels as determined by an ear

inspection or winter grow out test.

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History: 1994 AACS.

R 285.623.216 Certified single cross, double cross, and 3-way hybrids.

Rule 216. (1) A double cross hybrid is the first generation of a cross between 2 single

cross hybrids. A 3-way cross hybrid is the first generation of a cross between a

single cross hybrid and an inbred line.

(2) A certified double cross of 3-way corn hybrid shall be produced from foundation

seed (single cross or inbreds or both) that has been produced under the inspection of

the official seed-certifying agency or a seed-producing agency which is

recommended by the Michigan state university agricultural experiment station and

the official certifying agency and which is approved by the director of the

department of agriculture.

(3) All of the following isolation standards shall be complied with:

(a) A crossing field shall be so located that the seed parent is not less than 660 feet

from corn of a different color or texture. When the contaminating source is the same

color or texture of corn, the distance can be modified by the size of the crossing field

and by planting border rows of pollen parent in accordance with the following table:

Field Size in Acres

Minimum

9 or 40 or

Border

less 10-19 20-29 30-39 more

Rows

Distance 660 627 594 561 545 2

(in feet) 577 544 511 478 462 4

of seed 495 462 429 396 330 6

rows 412 379 346 313 290 8

from 330 297 264 231 214 10

other 247 214 181 165 165 12

corn 165 148 115 66 66 14

(b) Border rows to offset a lack of isolation distance shall be planted adjacent to the

exposed side or sides of the crossing field and shall produce an abundance of viable

pollen at the time the seed parent silks are receptive.

(c) Insufficient isolation distance can be offset by destroying a portion of the seed

parent in a manner and at a time specified by the official certifying agency.

(d) Two or more hybrids may be produced in the same field if the same pollen parent

is used.

(4) All of the following field inspection standards shall be complied

with:

(a) The standards in this rule apply only when 5.0% or more of the seed parent plants

have apparently receptive silks.

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(b) Crossing fields shall be inspected by the official certifying agency not less than 3

times during the pollinating period.

(c) A crossing field is ineligible if shedders, as defined in R 285.623.215(3)(d), are

more than 1.0% of the seed parent plants at any 1 inspection or if an accumulative total

of more than 2.0% shedders is found on any 3 consecutive inspections.

(d) Off-type plants shall be removed before pollen discharge.

(e) Corn that is harvested from crossing fields which are found to be ineligible for

certification shall not be sold for seed purposes.

(5) Both of the following seed inspection standards shall be complied with:

(a) Samples for moisture and germination determination shall be furnished to the

official certifying agency after the seed has been dried and shelled by the producer.

(b) Seed shall have a minimum germination of 90.0% and a minimum purity of 99.0%.

History: 1994 AACS.

PART 3. TURFGRASS SEED STANDARDS

R 285.623.301 Application for inspection and certification.

Rule 301. (1) An application for inspection and certification of turfgrass seed shall

be made to the seed-certifying agency by May 1 of each year in which seed is

produced.

(2) If a field, other than an annual ryegrass field, is not inspected by the seed-certifying

agency for 2 consecutive years, it is ineligible for production of foundation or certified

seed.

History: 1994 AACS.

R 285.623.302 Isolation.

Rule 302. (1) A field that is used for the production of certified seed shall be in

compliance with the minimum specified isolation distances from fields of any other

variety of the same species or closely related species, unless the field is used to

produce seed of the same variety and generation and is certified. A field that produces

seed of the same variety, but of a different generation, shall be isolated by a distance of

25.0% of the specified distance between varieties. This standard is to apply to all

turfgrass crops unless otherwise noted in the specific crop standards. An adequate

distance between seed crops shall be maintained to prevent mechanical mixture.

(2) If a bluegrass variety is less than 80.0% apomictic, then a 900-foot isolation distance

from other varieties is required if a field is used to produce foundation seed and a 165-

foot isolation distance is required if a field is used to produce seed of a certified class.

(3) An isolation strip may be used for any of the following purposes:

(a) To produce a crop of another species.

(b) To grow the same species, but the strip shall be cut to prevent seed production.

(c) To grow the same species, but seed from the isolation strip shall be harvested

separately and conditioned as uncertified. Reinspections in the field and warehouse will

be made to insure that this identity is maintained.

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(4) For a certified class of grass seed only, varieties that are 95.0% or more apomictic,

as defined by the originating breeder, shall have the isolation distance reduced to a

mechanical separation only.

History: 1994 AACS.

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

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Germination (minimum) 85.0%

History: 1994 AACS.

R 285.623.304 Annual ryegrass (Lolium multiflorum and Lolium rigidum).

Rule 304. (1) Land shall not have grown, or have been seeded to annualryegrass during

the previous 5 years, unless the land was used to produceannual ryegrass seed that is of

the same variety and class and iscertified. Land shall not have grown, or have been

seeded to perennial ryegrass during the previous 5 years to produce foundation seed,

and the previous 2 years to produce certified seed.

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

(3) Field standards for annual ryegrass seed are as follows:

Classes of Seed

Factor Foundation Certified

Other varieties (maximum) none 1.0%

Isolation 1, 2,

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,either annual or

perennial. Diploid ryegrass varieties need not beisolated from tetraploid ryegrass

varieties, except for a distance of 15 feet to prevent mechanical mixture.

2 See R 285.623.302 - Isolation.

(4) Seed standards for annual 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% 2.5%

Inert matter (maximum) 3.0% 3.0%

Weed seed (maximum) 0.15% 0.3%

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) 90.0%

History: 1994 AACS.

R 285.623.305 Bluegrass (Poa spp.).

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Rule 305. (1) The standards of this rule for bluegrass include Kentucky, rough, and big

bluegrasses.

(2) To be eligible to produce bluegrass certified seed, land shall not have grown, or

have been seeded to, bluegrass during the previous 3 years, unless the previous crop was

of the same variety and class and was certified. To produce foundation seed, land

shall have been free of bluegrass for 5 years.

(3) Bluegrass shall be planted in distinct rows.

(4) 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.

(5) Field standards for bluegrass seed are as follows:

Classes of Seed

Factor Foundation Certified

Other varieties (maximum)1 none 2.0%

Isolation2, 3 (minimum) 165 feet 165 feet

1 Includes off-type plants as may be designated by the varietal

description.

2 See R 285.623.302 - Isolation.

3 Mechanical isolation is required between rough bluegrass and Kentucky

bluegrass.

(6) Seed standards for bluegrass seed are as follows:

Other America

Varieties

Merion

Factor Foundation Certified Certified

Pure seed (minimum) 95.0% 95.0%

92.0%

Other crop (maximum) 0.1% 0.25%1

0.25%1

Inert matter (maximum) 5.0% 5.0% 8.0%

Weed seed2 (maximum) 0.1% 0.3%

0.3%

Prohibited noxious weeds (maximum) none none

none

Restricted noxious weeds and St.

Johnswart, docks, sheep sorrel,

bedstraw (maximum) 27 per pound 45 per pound 45

per pound

Germination (minimum) -- 75.0%

75.0%

1 Common Kentucky bluegrass is limited to 3.0% in merion, sabre, and colt rough

bluegrass and 2.0% in all other varieties.

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2 Annual bluegrass is not allowed in foundation seed.

History: 1994 AACS.

R 285.623.306 Fine fescue (Festuca rubra, Sub var rubra, Fallax, Ovina var

duruiscula).

Rule 306. (1) The standards of this rule for fine fescue include chewings, red, and

hard fescues.

(2) To be eligible to produce fine fescue foundation seed, land shall not have grown,

or have been seeded to, this species during the previous 5 years. Land shall not have

grown, or have been seeded to, fine fescue grasses during the previous 18 months to

produce certified seed, unless the previous crop was of the same variety and class and

was certified.

(3) Fine fescue shall be planted in distinct rows.

(4) 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.

(5) Field standards for fine fescue seed are as follows:

Classes of Seed

Factor Foundation Certified

Other varieties (maximum)1 none 1.0%

Isolation2, 3

Less than 5 acres (minimum) 1,320 feet 330 feet

More than 5 acres (minimum) 900 feet 165 feet

1 Includes off-type plants.

2 Hard fescue need not be isolated from red or chewings fescue.

3 See R 285.623.302 - Isolation.

(6) Seed standards for fine fescue seed are as follows:

Classes of Seed

Factor Foundation Certified

Pure seed (minimum) 98.0% 97.0%

Other crop (maximum) 0.1% 0.25%

Inert matter (maximum) 2.0% 3.0%

Weed seed (maximum) 0.1% 0.3%

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.

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R 285.623.307 Tall fescues (Festuca arundinacea).

Rule 307. (1) Land shall not have grown, or have been seeded to, tall fescue during the

previous 5 years to be eligible to produce foundation seed. Land shall not have grown,

or been seeded to, tall fescue grasses during the previous 2 years to produce certified

seed, unless the previous crop was of the same variety and class and was certified.

(2) Tall fescue 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 tall fescue seed are as follows:

Classes of Seed

Factor Foundation Certified

Other varieties (maximum)1 none 1.0%

Isolation2, 3

Less than 5 acres (minimum) 1,320 feet 330 feet

More than 5 acres (minimum) 900 feet 165 feet

1 Includes off-type plants.

2 See R 285.623.302 - Isolation.

3 Fields that are used for the production of foundation tall fescue seed shall be isolated

a minimum distance of 330 feet from perennial ryegrass.

(5) Seed standards for tall fescue seed are as follows:

Classes of Seed

Factor Foundation Certified

Pure seed (minimum) 98.0% 98.0%

Other crops (maximum) 0.1% 0.5%

Inert matter (maximum) 2.0% 2.0%

Weed seed (maximum) 0.3% 0.3%

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) 90.0%

History: 1994 AACS.

PART 4. SOD QUALITY SEED STANDARDS

R 285.623.401 Labeling of sod quality for varieties of turfgrass seed.

Rule 401. In addition to the labeling requirements of Act No. 329 of the Public Acts of

1965, as amended, being S286.701 et seq. of the Michigan Compiled Laws and Act No.

221 of the Public Acts of 1959, as amended, being S286.71 et seq. of the Michigan

Compiled Laws, and the rules promulgated thereunder, if seed is found to meet the sod

quality standards established in R 285.623.404, the seed kinds or kinds and varieties may

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be labeled with the words "Michigan sod quality seed" by permanently attaching a

tag to the container, as prescribed in R 285.623.402.

History: 1994 AACS.

R 285.623.402 Description and use of tags for sod quality seed.

Rule 402. (1) The official Michigan sod quality seed tag that is referred to in R

285.623.401 shall be prepared and issued by the director, be numerically identified, and

set forth the kind and variety, lot number, test date, and date of issuance. Duplicate sod

quality tags shall be attached to each container of the lot of seed that qualifies as

sod quality. A person shall not attach a sod quality seed tag to any container or lot of seed

that is not qualified as set forth on the tag and shall not remove a sod quality seed tag

before delivery of the seed to the ultimate purchaser.

(2) An official tag shall be of a size, color, and format as determined by the director of

the department of agriculture.

History: 1994 AACS.

R 285.623.403 Application, fees, and procedure for sod quality qualifications.

Rule 403. A person who desires to have his or her seed qualify as Michigan sod

quality seed shall request, in writing, that the official seed-certifying agency obtain

seed samples for this purpose. If the sampling and analysis is apart from, and in

addition to, the sampling and analysis that is performed by the official seed-certifying

agency in its other certification activities, the person who requests the sampling and

analysis shall pay, to the certifying agency, any fees as authorized by section 3 of Act

No. 221 of the Public Acts of 1959, as amended, being S286.71 et seq. of the

Michigan Compiled Laws. The analysis of seed samples shall be performed by

authorized personnel of the official seed-certifying agency in accordance with the

standards prescribed in R 285.623.404. If the sample that is subject to analysis for

Michigan sod quality seed qualification is from a regularly certified seed lot, only

part of which is to be qualified as Michigan sod quality seed, then a separate sample

shall be required from that part of the lot to be so qualified.

History: 1994 AACS.

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.

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(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.

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