WSU CAHNRS

Washington State University

Potatoes at WSU

Stored at 44°F for 60 Days – Photovolt and Reducing Sugars

  PHOTOVOLT READING DIFFUSDA % REDUCING SUGAR
Clonestembudaveragertg §COLORstembudrtg
Washington
1Ranger Russet13.832.2231-18.443.91.21
2Russet Burbank13.330.621.91-17.444.11.31
3A96023-613.423.318.409.9442.21
4A96108-1215.329.922.61-14.633.51.41
5A97142-330.444.437.44-14.111.40.64
6A97229-114.923.819.308.933.72.11
7A97287-623.935.929.92-12.622.10.93
8A98104-420.728.924.82+8.222.61.52
9AO96141-322.73629.42-13.322.30.93
10AO98133-227.438.332.93-1111.70.84
LSD 0.053.65.4
Average19.632.32612.832.91.3
Idaho
1Ranger Russet28.640.334.53-11.711.50.74
2Russet Burbank27.237.432.33-11.111.70.94
3A96023-628.134.331.23+6.211.614
4A96108-1217.138.227.62-21.133.20.82
5A97142-341.848.845.35+700.70.55
6A97229-130.337.233.73-9.411.40.94
7A97287-642.944.643.85+8.500.60.65
8A98104-432.642.937.74-10.201.20.65
9AO96141-325.940.833.43-15.811.80.74
10AO98133-249.248.548.85+3.600.50.55
LSD 0.054.25.3
Average32.441.336.810.511.40.7
Oregon
1Ranger Russet26.241.7343-15.511.80.74
2Russet Burbank21.139.330.22-18.222.50.83
3A96023-619.633.326.42-13.622.71.13
4A96108-1221.133.727.42-12.822.51.13
5A97142-328.943.636.34-14.711.50.64
6A97229-125.333.829.62+8.511.91.13
7A97287-635.345.540.44-12.3010.65
8A98104-426.935.1313-10.411.714
9AO96141-343.148.345.75+5.100.60.55
10AO98133-239.142.740.95+5.200.80.65
LSD 0.053.84.8
Average28.739.734.211.611.70.8
Date test performed:
WashingtonDec. 1Dec. 1
IdahoDec. 7Dec. 7
OregonDec. 13Dec. 13
§ 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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