November/December 2021 - 27

dianthicola. To date, no positives
have been confirmed. Several growers
will continue Dickeya dianthicola
testing on their harvested tubers.
Seed growers were proactive with
protective fungicides, reducing
potential for Alternaria solani and
Phytophthora
infestans.
Growers
monitored the Blight Alert programs
for the region. No late blight was
reported. Mosaic vectoring aphid
counts were tracking below the
previous year, slightly decreasing
the vector risk factor. Again, seed
growers were strongly encouraged to
use protective oils and insecticides
through the growing season and vine
kill as early as possible.
The 2021 crop included 14,443 acres
which passed field inspection tolerances
for certification, just 103 acres less
than 2020.
The top five varieties were:
Norland strains, 2,544 acres; Umatilla
Russet, 2,143 acres; Bannock Russet,
1,266 acres; Dakota Pearl, 1,117 acres;
and Ranger Russet, 1,081 acres. The
2021 seed directory can be accessed at
www.nd.gov/seed/.
North
Dakota
State
Seed
Department tissue culture and
greenhouse staff harvest minituber
crops in June and October. These
minitubers will supply North
Dakota seed growers with the first
field year crop of 2022, creating a
clean seed source for crops in future
years. Nearly all early field generation
seed lots in North Dakota are planted
in very isolated areas in the western
part of the state. Inspection results
indicated freedom from viruses.
Threat by aphid populations,
mosaic or late blight inoculum was
very low and not observed. These seed
lots provide the basis for future North
Dakota seed production.
The cycle of seed potato certification
continues as North Dakota certified
seed growers randomly select tubers
from 2021 crop seed lots requiring
a postharvest test planted in
Homestead, Florida. Results from this
stage of testing will determine seed
lots eligible for certification for the
future 2022 crop.
- Report by Kent Sather, Director,
Potato Programs, North Dakota State
Seed Department
OREGON
In 2021, Oregon Seed Certification
Service (OSCS) certified 3,052 acres of
seed potatoes, about 10% higher than
our 10-year average and just shy of
200 acres more than 2020.
Several lots were rejected this year
due to seedborne PVY,
and others
had to be withdrawn due to the lack
Spudman * November/December 2021
25

http://www.nd.gov/seed/

November/December 2021

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