Wisconsin Administrative Code
Department of Agriculture, Trade and Consumer Protection
ATCP 140 - Marketing
Chapter ATCP 156 - Certified Seed Potatoes
Subchapter III - Grading
Section ATCP 156.11 - Defects
Universal Citation: WI Admin Code ยง ATCP 156.11
Current through August 26, 2024
(1) EXTERNAL DEFECTS. External defects in a certified seed potato include the following:
(a) Deep air cracks that penetrate beyond the
vascular ring.
(b) Shallow air
cracks that materially detract from the appearance of the potato.
(c) Second growth or growth cracks that
materially detract from the appearance of the potato.
(d) Brown or dark skin discoloration that
materially detracts from the appearance of the potato.
(e) Shriveling, sponginess or flabbiness,
except minor shriveling.
(f) A
sprout over one inch long.
(g) One
or more scabs that together cover more than 5% of the potato surface. Scabs may
include pitted scabs.
(h) Pitted
scab that causes a loss of more than 5% of the weight of the potato.
(i) Rhizoctonia that materially detracts from
the appearance of the potato.
(j)
Wireworm or grass damage that includes any of the following:
1. In a potato that is at approximately 21/2
inches wide or weighs approximately 6 ounces, a hole more than 3/4 inch long or
multiple holes with an aggregate length of more than 11/4 inch.
2. Proportionately smaller or larger holes in
a smaller or larger potato.
(k) A more than slight amount of dirt or
foreign matter adhering to the potato, or present in the sample of
potatoes.
(2) INTERNAL DEFECTS. Internal defects in a certified seed potato include the following:
(a) Ingrown sprouts, if removal causes a loss
of more than 5% of the weight of the potato.
(b) Internal discoloration, occurring
entirely within the vascular ring, which includes any of the following:
1. In a potato that is at approximately 21/2
inches wide or weighs approximately 6 ounces, the equivalent of 3 scattered
light brown spots 1/8 inch in diameter.
2. A proportionately smaller or larger number
or size of spots in a smaller or larger potato.
(c) Internal discoloration located or
extending outside of the vascular ring, if removal causes a loss of more than
5% of the weight of the potato.
(3) DEFECTS CONSTITUTING SERIOUS DAMAGE. The following defects constitute serious damage:
(a) Caked dirt covering more than 1/2 of the
potato.
(b) Brown or dark skin
discoloration that seriously detracts from the appearance of the
potato.
(c) Excessive shriveling,
sponginess or flabbiness.
(d) One
or more scabs that together cover more than 50% of the potato surface. Scabs
may include pitted scabs.
(e)
Pitted scab that causes a loss of more than 10% of the weight of the
potato.
(f) Wireworm or grass
damage that includes any of the following:
1.
In a potato that is at approximately 21/2 inches wide or weighs approximately 6
ounces, a hole more than 11/4 inches long or multiple holes with an aggregate
length of more than 2 inches.
2.
Proportionately smaller or larger holes in a smaller or larger
potato.
(g) Ingrown
sprouts, if removal causes a loss of more than 10% of the weight of the
potato.
(h) Internal discoloration,
occurring entirely within the vascular ring, which includes any of the
following:
1. In a potato that is at
approximately 21/2 inches wide or weighs approximately 6 ounces, the equivalent
of 6 scattered light brown spots 1/8 inch in diameter.
2. A proportionately smaller or larger number
or size of spots in a smaller or larger potato.
(i) Internal discoloration located or
extending outside of the vascular ring, if removal causes a loss of more than
10% of the weight of the potato.
Disclaimer: These regulations may not be the most recent version. Wisconsin may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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