November/December 2019 - 31
An unbiased source of seed potato
health information can be found
on the North American Seed Potato
Health Certificate. The format for this
certificate came out of cooperation
between the joint U.S. and Canada
Potato Association of America seed
sub-committee. It evolves as new
diseases emerge and the needs of the
industry change.
Information included on the health
certificate, which is typically provided
to the buyer from the seller at the time
of sale, includes seed lot identifiers
that allow trace back to the specific
farm and seed lot, as well as the seed
class or years in the field. Information
on summer inspection and, where
applicable, summer pathogen testing
is conducted are detailed and include
visual readings for mosaic, leafroll,
blackleg, varietal mixture and fungal
diseases which affect tubers.
Post-harvest data is also included
and, depending on the individual
states or provinces, both visual and
laboratory results are reported.
The form allows for customization
depending on the type of data the
specific program collects. Also, it gives
the history for occurrence of bacterial
ring rot, late blight and root knot and
golden nematodes.
Another benefit of the Potato
Health certificate is that it fosters
better communication between the
seed suppliers and buyers. Seed potato
producers face heightened challenges
NATIONALPOTATOCOUNCIL.ORG
with the emergence of aggressive virus
strains that have the capability to not
only reduce yield, but affect quality.
Perfect scores for virus diseases -
especially mosaic caused by potato
virus Y - are much harder to attain
due to strains that produce very weak
symptoms and varieties that are both
highly susceptible and asymptomatic.
As seed growers face these challenges,
the health certificate is a good place to
start the discussion with customers as to
how they are approaching management
of these important diseases.
- Nina Zidack, Ph.D., is the director of
the Montana State University Seed Potato
Certification Program and an associate
research professor of plant science and
plant pathology for the university.
We can talk all day about our
high quality machines for
storage and processing, but...
... it's the result
that counts
www.tolsma-usa.com
Improving your agribusiness in an intelligent way
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Spudman * November/December 201906-11-19 16:52
29
http://www.NATIONALPOTATOCOUNCIL.ORG
http://www.tolsma-usa.com
November/December 2019
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