2007 - Potatoes at WSU - Washington State University

LTS
2007 Late Harvest Tri-State Trial
Location: WSU Research Center – Othello, WA
Planting Date: April 18 Vine Kill Date: Sept 17
Harvest Date: Sept 26 Days Grown: 152
Fertility: 278-175-400
In-Row Spacing: 10 in.
The Tri-State trial is a part of the cooperative cultivar development program conducted at locations
in Washington, Oregon, and Idaho. The Tri-State committee selects all official entries in this
trial. All entries are grown for full season late harvest in each of the three states to determine how
they perform when grown under different management and climatic conditions. The following is
a summary of the Washington field and post harvest results. For additional information, see the
grading comments and merit scores near front of book. For additional information, see the grading
comments and merit scores near front of book.
Fresh Market Standouts: AO96305-3, A0008-1TE, AO96365-2
Process Market Standouts: A96814-65LB, A98345-1, AO96305-3
Suggested Discards: PA00N15-2, PA99NM38-1, PA99N12-1, PA99N82-4
Standcounts
‣ 30 Day
Fast emergence: A93845-1 (97%), Ranger Russet (89%), Russet Burbank (74%).
Slow emergence: A97066-42LB (1%), PA99N2-1 (3%), PA00N14-2 and PA98NM38-1 (5%).
‣ 50 Day
Full emergence: Most entries had > 97% emergence at 50 days.
Plant and Tuber Growth & Development
‣ 50 Day Stem Number per Plant
Most: PA99N2-1 (3.3).
Least: A97066-42LB (1.3) and A99073-1 (1.4).
‣ Average Tuber Number Per Plant
Most: PA99N2-1 and AO96365-2 (9.4).
Least: A99073-1 (5.3)
‣ Average Tuber Size (oz)
Largest: A98345-1 and A99073-1 (7.9).
Smallest: PA98NM38-1 (4.5) and PA99N82-4 (5.2).
‣ Undersized Tubers (< 4 oz)
Most: PA98NM38-1, AO96365-2, and PA99N2-1 (all > 110 CWT/A).
Least: A99073-1 and A97066-42LB.
2007 Potato Cultivar Evaluations 34 WSU Potato Research Group