Each lot of seed stock found to contain rough bluegrass must be placed under "stop sale" to be released only for shipment out of the quarantine area or for planting in nurseries of two acres or less under supervision of, and approved by, an agent of the department of agriculture. The nursery must be seeded in rows. It is the duty of the person receiving such seed to rogue this increase area or chemically treat to eradicate the rough bluegrass thus assuring production of seed that is free of rough bluegrass. Seed increase areas are inspected by the department at least three times during the seedling year. Any areas not passing inspection must not be harvested, but instead must be destroyed by the person who planted the increase area upon order of the director of the Washington state department of agriculture or his/her agent. If not destroyed as directed, the department of agriculture may have the plot destroyed and the grower shall be liable for all expenses.