2007 - Potatoes at WSU - Washington State University

LTS
Yield and Economic Data
‣ Total and Market Yield (US 1s & 2s > 4oz)
Highest: A98345-1 and PA00N15-2 had the highest and second highest total & market yields,
respectively.
Lowest: PA98NM38-1 had the lowest total and market yields.
‣ % Market Yield Greater Than 6 oz.
Highest: A98345-1 (79%).
Lowest: PA98NM38-1 (38%) and PA99N82-4 (45%).
‣ Carton Yield (100 to 50 Count, 7 to 18 oz US#1 Tubers)
Highest: A98345-1, PA00N15-2, & A97066-42LB (all > 358 CWT/A).
Lowest: PA98NM38-1, PA98N82-4, and PA00N14-2 (all < 190 CWT/A).
‣ Gross Return ($/acre)
Fresh Market Highest: A98345-1 (skin & shape issues may disqualify it)
Fresh Market Lowest: PA98NM38-1
Process Market Highest: A98345-1, PA00N15-2
Process Market Lowest: PA98NM38-1, A99073-1
Tuber Defects (% out of 40 tubers, 8-12 oz.)
‣ External Defects
Notable Defects: PA98NM39-1 had 12% growth crack, while PA99N82-4 had 9% and A99073-1
had 7%. A96814-65LB and A97066-42LB each had 3% green tubers.
‣ Internal Defects
Notable Defects: Russet Burbank had 25% hollow heart and 19% brown center. PA99N12-1
and PA99N82-4 each had 5% hollow heart. PA00N10-5 had 5% brown center. None of the other
entries had any internal defects.
‣ Bruise
Highest Blackspot: Ranger Russet (81%), A98345-1 (62%), and PA98NM39-1 (59%).
Highest/Lowest Shatter: Five entries had 100% shatter; PA00N10-5, PA00N14-2, PA98NM38-1,
PA98NM39-1, and PA99N2-1. Eight other entries had over 80% shatter. AO96365-2 (50%) and
Ranger Russet had the lowest (66%).
2007 Potato Cultivar Evaluations 35 WSU Potato Research Group