Section R. 285.623.210 - RapeRule 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: | 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 (maximum) | 0.05% | 0.25% |
| 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.Mich. Admin. Code R. 285.623.210