2007 - Potatoes at WSU - Washington State University

Yield and Economic Data
ERT
‣ Total Yield and U.S. #1 Yield
Highest: CO97138-7Ru, highest total and U.S. #1 yield. A95409-1 had the second highest U.S.
#1 yield with 503 CWT/A.
Lowest: AC96052-1Ru, AOA95154-1, AOA95155-7, and AOTX95265-2ARu.
‣ % U.S. #1’s (greater than 4 oz)
Highest: A95409-1 (96%).
Compare to R. Norkotah at 87%.
Lowest: AC96052-1Ru (67%), R. Burbank (74%) and AOA95154-1 (76%).
‣ Carton Yield (100 to 50 Count (7 to 18 oz U.S.#1 Tubers))
Highest: A95409-1 (390 CWT/A) and CO97138-7Ru (388 CWT/A).
Lowest: AC96052-1Ru, AOA95155-7, and AOA95154-1.
‣ Gross Return ($/acre)
Fresh Market Highest: CO97138-7Ru, A95409-1, and A96104-2.
Fresh Market Lowest: AC96052-1Ru , AOA95155-7, and AOA95154-1.
Process Market Highest: AO96164-1, A95409-1, and A96104-2.
Process Market Lowest: AC96052-1Ru , AOA95155-7, and AOA95154-1.
Tuber Defects (40 tuber sample of 8-12oz tubers)
‣ External Defects
Notable Defects: Russet Burbank had the highest percentage of growth cracks (6%) and knobs
(3%).
‣ Internal Defects
Notable Defects: CO95172-3Ru had the only occurrence of hollow heart (5%) and brown center
(8%). Shepody had the highest occurrence of internal brown spot (5%), while Norkotah and
CO97087-3Ru each had 3%.
‣ Bruise
Highest Blackspot: TXA549-1Ru (45%) and CO97138-7Ru (42%). All other entries had less than
33%.
Highest Shatter: AC96052-1Ru (48%), AOA95155-7 (39%), and CO95172-3Ru (38%).
2007 Potato Cultivar Evaluations 69 WSU Potato Research Group