External Defects------------------------------------------------------------------------
Maximum allowed Maximum allowed
Defects for U.S. No. 1 for U.S. No. 2
processing processing------------------------------------------------------------------------Air cracks...................... 5% waste.......... 10% waste.Blackleg........................ 5% waste.......... 10% waste.Bruises......................... 5% waste.......... 10% wasteCuts............................ Smooth, not more Smooth, not more
than 10% of than \1/3\ of
surface. surface.Enlarged lenticels, discolored 5% waste.......... 10% waste.
or sunken.Flea Beetle..................... 5% waste.......... 10% wasteFolded end...................... 5% waste.......... 10% waste.Fusarium tuber rot.............. 5% waste.......... 10% waste.Grass, wireworm................. 5% waste.......... 10% waste.Greening, light................. 5% waste.......... 10% waste.Growth cracks................... See Footnote No. 2 10% waste.Grub............................ 5% waste.......... 10% waste.Ingrown sprouts................. 5% waste.......... 10% waste.Nematodes....................... 5% waste.......... 10% waste.Rhizoctonia, solid or thick Not more than 10% Not more than 25%
mounded. of surface. of surface.Rodent, bird damage............. 5% waste.......... 10% waste.Scab, pitted.................... 5% waste.......... 10% waste.Scab, russet.................... 25% of surface or 50% of surface or
5% waste. 10% waste.Scab, surface................... 25% of surface or 50% of surface or
5% waste. 10% waste.Scab, surface (elephant hide)... 10% of surface or 25% of surface or
5% waste. 10% waste.Second growth................... 5% waste.......... 10% waste.Scaling, surface cracks--when 10% of surface or 25% of surface or
cracked, thick and has depth. 5% waste. 10% waste.Sunburn......................... 5% waste.......... 10% waste.Sunken discolored areas......... 5% waste.......... 10% waste.------------------------------------------------------------------------
Internal Defects------------------------------------------------------------------------
Maximum allowed Maximum allowed
Defects for U.S. No. 1 for U.S. No. 2
processing processing------------------------------------------------------------------------
Occurring outside of or not entirely confined to the vascular ring------------------------------------------------------------------------Internal Black Spot, Internal 5% waste.......... 10% waste.
Discoloration, Vascular
Browning, Fusarium Wilt, Net
Necrosis, Other Necrosis, Stem
End Browning.------------------------------------------------------------------------
Occurring entirely within the vascular ring------------------------------------------------------------------------Hollow Heart or Hollow Heart Area affected not Area affected not
with Discoloration. to exceed that of to exceed that of
a circle \7/8\ a circle 1\1/4\
inch in diameter inches in
in a 10 ounce diameter in a 10
potato. \1\. ounce potato. \1\Light Brown Discoloration (Brown Area affected not Area affected not
Center). to exceed that of to exceed that of
a circle \7/8\ a circle 1\1/4\
inch in diameter inches in
in a 10 ounce diameter in a 10
potato. \1\. ounce potato. \1\Internal Brown Spot and similar Not more than the Not more than the
discoloration (Heat Necrosis). equivalent of 3 equivalent of 6
scattered spots scattered spots
\1/8\ inch in \1/8\ inch in
diameter in a diameter in a
potato 6 ounces potato 6 ounces
in weight or 2\1/ in weight or 2\1/
2\ inches in 2\ inches in
diameter, or diameter or
correspondingly correspondingly
lesser or greater lesser or greater
number of spots number of spots
in smaller or in smaller or
larger potatoes. larger potatoes.------------------------------------------------------------------------\1\ Note: Or correspondingly lesser or greater areas in smaller or
larger potatoes.