Pennsylvania Code
Title 7 - AGRICULTURE
Part V - Bureau of Plant Industry
Chapter 115 - STANDARDS FOR SEED CERTIFICATION
Subchapter D - CORN-COMMERCIAL HYBRIDS
FIELD STANDARDS
Section 115.89 - Inspection and mixture requirements

(a) Before the pollination period the plot or fields in which the hybrid is being produced shall be inspected at least once for purity as to plant type and isolation. Off-type plants shall be destroyed before they shed pollen. A field that, after pollen shedding begins, contains more than .2% of off-type plants, or more than 2% of plants of doubtful type may not be eligible for certification.

(b) During the pollination period, the plot or field shall be inspected by the certifying agency as many times as deemed necessary. Inspection shall be made without giving previous notice to the grower.