Apparent mixtures shall be properly rogued from the pollen (male) parent before the seed (female) parent silks. The seed parent shall be carefully rogued throughout the growing and harvesting season. To be acceptable, plots shall show less than .1% off-type plants shedding pollen, in the pollen parent row, or a total of 2% of doubtful plants during any one inspection.
7 Pa. Code § 115.164