WSU CAHNRS

Washington State University

Potatoes at WSU

Stored at 48°F for 60 Days – Photovolt, Reducing Sugars, and Sprouting

  PHOTOVOLT READING DIFFUSDA % REDUCING SUGAR SPROUTING
Clonestembudaveragertg §COLORstembudrtg(%)length (in)
Washington
1Ranger Russet24.144.234.23-20.122.10.6480.25
2Russet Burbank26.644.835.74-18.211.80.640
3A96023-623.837.730.73-13.922.10.8373.25
4A96108-1217.238.9282-21.833.20.8267.5
5A97142-345.35148.15+7.200.60.5540.125
6A97229-130.738.834.73+8.601.30.8440.125
7A97287-633.545.239.34-11.901.10.650
8A98104-438.243.8415+6.400.80.6583.25
9AO96141-335.450.843.15-15.3010.5553.125
10AO98133-242.348.745.55+7.400.60.5583.25
LSD 0.053.95.322
Average31.744.43813.111.50.652
Idaho
1Ranger Russet40.550.245.45-9.900.70.5513.25
2Russet Burbank35.944.2404-10.900.90.650
3A96023-636.941.739.34+6.400.90.7513.125
4A96108-1235.450.142.75-14.6010.557.125
5A97142-351.353.552.45-6.700.50.650
6A97229-150.850.550.65+3.400.50.550
7A97287-650.855.353.15+7.300.50.550
8A98104-444.748.746.75+4.800.60.550
9AO96141-341.653.247.45-11.600.70.6527.5
10AO98133-256.155.555.85+2.500.40.452041641.5
LSD 0.053.3516
Average44.450.347.37.800.70.58
Oregon
1Ranger Russet31.644.5384-12.901.20.6553.5
2Russet Burbank26.442.334.33-1611.80.640
3A96023-62740.833.93-13.911.70.7493.25
4A96108-1230.446.338.44-15.911.40.5593.5
5A97142-348.151.449.85+500.50.5527.125
6A97229-131.542.5374-14.901.30.657.125
7A97287-637.350.8445-13.700.90.550
8A98104-43736.9374+5.100.90.951001.75
9AO96141-354.853.554.25+200.50.6560.25
10AO98133-245.548.747.15+3.600.60.5560.25
LSD 0.053.65.221
Average3745.841.410.301.10.649
Date test performed:
WashingtonDec. 2Dec. 18
IdahoDec. 8Dec. 18
OregonDec. 14Dec. 18
§ rtg = rating (1-5, 5 is best); av = average Photovolt reading; Diff = Aboslute difference between stem and bud Photovolt reading. Stem to bud differences of nine or greater (-) lose one point and differences of less than nine (+) gain one point in the accumulated total postharvest rating.
Potatoes at WSU, PO Box 646414, Washington State University, Pullman WA 99164-6414, 509-335-9502
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