DEPARTMENT OF AGRICULTURE AND RURAL DEVELOPMENT

PESTICIDE AND PLANT PEST PESTICIDE MANAGEMENT DIVISION

REGULATION NO. 623. FIELD SEED CERTIFICATION

Filed with the sSecretary of sState on

These rules take effect 7 days after filing with the sSecretary of sState.

(By authority conferred on the director of agriculture and rural development by section 2 of Act No. 221 of the Public Acts of 1959, as amended, 1959 PA 221, MCL 286.72, and section 178 of the Executive organization act of 1965, 1965 PA 380, MCL Act No. 380 of the Public Acts of 1965, as amended, being SS286.72 and 16.278 of the Michigan Compiled Laws)

R 285.623.205, R 285.623.214, and R 285.623.215 of the Michigan Administrative Code are amended, to read as follows:

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 shown in table 205.1:

TABLE 205.1

Field Standards for Small Grain Seed and Buckwheat

Factor	Foundation	Maximum Each Class Certified
Other varieties or off-types	.02%	.05%
Inseparable other crops 1	1 per acre	5 per acre
Bunt	none	none
Other smuts 2	.5%	2.0%

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

   (b) 2 Seed from fields that have more than 0.5% other smuts shall must be treated with a fungicide that is approved by the director.

  (2) Rye shall must be 650 660 feet from fields that could be a source of contamination.

  (3) Seed standards for small grain seed and buckwheat are as follows shown in table 205.2:

TABLE 205.2

Seed Standards for Small Grain Seed and Buckwheat

Factor	Foundation	Class of Seed 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
Winter crops in spring crops	5 per 2 pounds	10 per pound
Spring crops in winter crops	5 per 2 pounds	10 per pound
Other varieties or off-type same crop (maximum)	.02%	.05%
Germination (minimum) wheat, oats, barley, or triticale		90.0%
Germination (minimum) rye, spelt, or buckwheat		80.0%

(a) 1 Minimum pure seed percentage of rye or spelt is 98.0%; with inert matter at a maximum of 2.0%

(b) This does not apply in such cases where climatic conditions do not take care of the situation.

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 must be isolated by a distance of not less than 825 660 feet from other corn or 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 must not apply when increase is by hand-pollination.

  (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 the director of the department of agriculture.

(5) (4) Fields shall must be inspected by the certifying agency not less than 4 times during the pollinating period. Roguing for off-type plants shall must be performed before any pollen discharge. An inbred that has more than 0.1% definitely off-type plants or more than 1.0% of doubtful-type plants shall must not be certified.

  (6) (5) A seed lot of an inbred line shall must not have more than 0.1% definitely off-type ears or more than 0.2% ears with of-color kernels as determined by an ear inspection or winter grow out test.

R 285.623.215  Foundation corn; single cross hybrids.

  Rule 215.  (1) A single cross hybrid shall must consist of the first generation of a cross between 2 certified inbred lines.

  (2) A single cross crossing field shall must be isolated by a distance of not less than 825 660 feet from other corn of like color or texture and 1,320 feet from corn of a different color of texture.

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

   (a) Fields shall must 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 must 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 must 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 must not be certified.

   (h) At the time of the last inspection, the seed parent in a crossing field shall must 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 must 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.