2
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
Spring crops in winter crops
Other varieties or off-type same
crop (maximum)
Germination (minimum) wheat,
oats, barley, or triticale
5 per 2 pounds
5 per 2 pounds
10 per pound
10 per pound
.02%
.05%
90.0%
80.0%
Germination (minimum) rye, spelt,
or buckwheat
(a) 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 must be isolated by a distance of not less than 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 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) Fields must be inspected by the certifying agency not less than 4 times during the
pollinating period. Roguing for off-type plants 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 must not be certified.
(5) A seed lot of an inbred line 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 must consist of the first generation of a cross
between 2 certified inbred lines.
(2) A single cross crossing field must be isolated by a distance of not less than 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 must be complied with:
(a) Fields 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 must be detasseled.