State Seed Department potato inspectors inspect fields in the state a
minimum of three times during the pre-harvest period. Inspectors perform
the first inspection approximately 45 days after planting and the second
approximately 10 days later for the purpose of determining virus levels,
presence of disease, varietal purity and other factors associated with
seed quality. A third inspection is performed prior to vine-kill
primarily for the purpose of bacterial ring rot detection.
Some varieties, especially those known as potentially symptomless or
that show very mild symptoms, are subjected to laboratory testing for
the presence of mosaic viruses. Also, growers may choose to have any seed
lot summer tested for virus X and other pathogens. North Dakota seed standards
are published in Administrative Code.
Growers are responsible for maintaining the quality, health and condition
of seed fields in the program. Among the most important factors:
- Insect control must be maintained early and until vines are
killed. Excessive insect injury can lead to disqualification of seed lots.
- Vine killing may only commence with prior approval of seed inspectors.
- Factors such as excess weeds, hail, chemical damage that interfere
with the inspector’s ability to determine field condition lead to
- Growers are encouraged to rogue early and often, in an effort
to lower total serious viruses and avoid the spread of such.
- Fields are reinspected at the discretion of the Department, if
requested within three days of rejection and provided no additional roguing