2007 - Potatoes at WSU - Washington State University

Yield and Economic Data
ETS
‣ Total Yield
Highest: PA00N15-2, PA00N14-2, and A98345-1 (all > 549 CWT/A).
Lowest: A99073-1 and A97066-42LB.
‣ % U.S. #1’s (>4 oz)
Highest: A98345-1 and Shepody (91%), PA00N14-2 (90%).
Lowest: Russet Burbank and A99073-1 (72%).
‣ Carton Yield (100 to 50 Count (7 to 18 oz U.S.#1 Tubers))
Highest: A98345-1, A0008-1TE, and PA00N15-2 (all > 330 CWT/A).
Lowest: A97066-42LB (133 CWT/A) and PA98NM38-1 (150 CWT/A).
‣ Specific Gravity
Highest: A96814-65LB (1.086) and PA00N14-2 (1.084).
Lowest: A0008-TE, A99073-1, and PA99N82-4 (1.073).
‣ Gross Return ($/acre)
Fresh Market Highest: A98345-1, PA00N14-2, and PA00N15-2.
Fresh Market Lowest: PA98NM38-1, A97066-42LB, and A99073-1.
Process Market Highest: A98345-1, PA00N14-2, and PA00N15-2.
Process Market Lowest: PA99N82-4, A97066-42LB, and A99073-1.
Tuber Defects (% out of 40 Tubers, 8-12 oz.)
‣ External Defects
Notable Defects: A99073-1 had the highest percentage of growth cracks (15%), while PA99N82-
4 had (10%), and AO96305-3 had 6%. Russet Burbank had the highest percentage of knobs
(6%). All other entries had little to no external defects.
‣ Internal Defects
Notable Defects: Russet Burbank had the highest occurrence of brown center (15%). Internal
Brown Spot: Russet Burbank, A0008-1TE, AO96365-2, PA00N15-2, PA98NM39-1, and
PA99N12-1 (3%). All other entries were 0%.
‣ Bruise
Highest Blackspot: A96814-65LB (35%), Russet Burbank and Ranger Russet each had (28%).
Highest Shatter: PA99N82-4 (63%), A99073-1 (44%), and PA99N12-1 (35%). All other entries
were below 28%.
2007 Potato Cultivar Evaluations 21 WSU Potato Research Group