February 2024 - 17

" There's a lot of angst about this
disease in the United States, given the
proximity of these reports on Prince
Edward Island, " Gevens said. " It's very
close to us in terms of geography but also
very close to us in terms of the exchange
of potatoes through the market space. "
Potato wart - first and last
detected in the U.S. in
Pennsylvania home
gardens in 1918 - is not
easily managed and
difficult to eradicate,
she said.
seed and table potatoes in the Canadian
province and sparked fear of the
stubborn pathogen crossing into the U.S.
CFIA completed an investigation
into PEI potato wart in August 2023. An
analysis of nearly 50,000 soil samples
from fields associated with the 2021
detections found potato wart in four
additional fields - a result " expected in
investigations of this scale, " according
to a statement on the CFIA website.
The agency imposes controls on fields
where potato wart is detected as part of
the risk mitigation plan currently being
evaluated. An online public comment
period seeking feedback on elements
of the plan, including seed potato
production in fields associated with
potato wart, closed Jan. 31.
An October 2022 risk assessment by
APHIS stated that PEI's potato wart
infestation is likely larger
than reported and that the
virus is " almost certain to be
introduced " to the U.S. without
additional mitigation measures.
" Right now, we're looking at all of these
public comment periods and notices
and how they build on each other. What
it tells us is January of '25 at the earliest
(before the plan is finalized), and that's
a lot of risk to ask the U.S. industry to
hold, " Quarles said. " All it takes is one
unfortunate circumstance, and the results
are going to be really ugly for the U.S. "
JUSTIFIABLE CONCERNS?
Given the challenges potato wart
presents, such worries are valid,
said Amanda Gevens, chair of Plant
Pathology at the University of
Wisconsin (UW) Madison.
" The perspective
on this, as a research
scientist in potato
pathology, is that we want
to be extremely proactive and
protective of our U.S. production
systems, particularly our seed growers
and seed production regions, because
once the pathogen is introduced, it shuts
down production fields, " Gevens said.
Gevens said she is not allowed to
have potato wart in her lab, or to test a
questionable sample.
" It has that level of alarm, " she
said. " We don't consider it something
that we can tolerate at a low level. It's
something that we don't accept at all. "
James Woodhall, an assistant
professor and Extension specialist -
plant pathologist at the University of
Idaho, said there are two main ways to
control potato wart.
Spudman.com 17

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February 2024

Table of Contents for the Digital Edition of February 2024

Editor's Letter
Water worries
Necessity driving invention
Growing concern
Making an impact
Potato Association of America
National Potato Council
Potatoes USA
Calendar
Advertiser Index
February 2024 - 1
February 2024 - 2
February 2024 - 3
February 2024 - Editor's Letter
February 2024 - 5
February 2024 - 6
February 2024 - 7
February 2024 - Water worries
February 2024 - 9
February 2024 - 10
February 2024 - 11
February 2024 - Necessity driving invention
February 2024 - 13
February 2024 - 14
February 2024 - 15
February 2024 - Growing concern
February 2024 - 17
February 2024 - 18
February 2024 - 19
February 2024 - Making an impact
February 2024 - 21
February 2024 - 22
February 2024 - 23
February 2024 - 24
February 2024 - 25
February 2024 - 26
February 2024 - 27
February 2024 - Potato Association of America
February 2024 - 29
February 2024 - National Potato Council
February 2024 - 31
February 2024 - Potatoes USA
February 2024 - 33
February 2024 - Advertiser Index
February 2024 - 35
February 2024 - 36
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