2007 - Potatoes at WSU - Washington State University

More documents

Recommendations

Info

Soft rot index - Bacterial soft rot susceptibility was determined by wounding the stem and bud ends of room-temperature tubers, inoculating the wounds with Erwinia carotovora var. carotovora, and incubating the tubers (6 tubers per clone) for 24 hours at 72°F in a mist chamber. The percentage fresh weight of tissue lost due to rot is reported. Reconditioning potential - Reconditioning ability of tubers stored at 40°F for approximately 40 days was determined by subsequently storing the tubers at 60°F for 21 days. The change in fry color over the reconditioning interval provides a relative measure of the reconditioning potential for each clone. Sprouting - The degree of sprout development in tubers stored at 40° and 48°F was assessed after all other tests had been completed (usually late December). The percentage of tubers that sprouted and the average sprout length per tuber were recorded for 15 tubers of each clone. Tuber shape characteristics - The lengths and widths of up to twenty five 8- to 10-ounce tubers from each clone were measured and length:width (L/W) ratios reported. This was done to reveal the effects (if any) of growing location on tuber shape and to estimate the yield (% by number) of ≥3-inch long fries for each clone. Fry yields were calculated based on algorithms relating tuber shape (L/W) to the number and weight of fries. The following table reflects these relationships. Visual Shape Tuber L/W ratio Percentage of French Fries (≥3in.) (by weight) (by number) Round 1.00 53.9 35.2 1.25 70.3 51.6 Blocky 1.50 82.6 64.1 1.75 90.8 72.8 2.00 95.0 77.6 Elongated 2.25 95.1 78.5 A L/W ratio close to one indicates a round tuber which is not ideally suited for French fry production. A ratio in the 1.5 to 1.75 range represents an oblong, blocky tuber, such as Russet Burbank, which is desirable for processing. A typical L/W ratio for Russet Burbank is about 1.80. A schematic illustrating the relative sizes of potatoes having various ratios is included in the postharvest sections for the Tri-State and Regional Trials. Blocky tubers result in high French fry yield with less waste. Long-term Storage Characteristics of Clones in the 2006 Tri-State and Regional Variety Trials For evaluation of long-term storability, tubers were held at 48 o F until late December and were then transferred to 44 o F. The tubers were processed into French fries, and reducing sugars were measured in late April or early May of the following year. Tubers were not reconditioned prior to frying. Results from clones that were advanced from the Tri-State to the Regional Trial are reported in the Regional Trial section. 2007 Potato Cultivar Evaluations 9 WSU Potato Research Group
ETS 2007 Early Harvest Tri-State Trial Location: WSU Research Center – Othello, WA Planting Date: April 4th Vine Kill Date: July 23rd Harvest Date: Aug 7th Days Grown: 110 Fertility: 278-175-400 In-Row Spacing: 12 in. The Tri-State trial is conducted annually in Washington, Idaho, and Oregon. The Tri-State committee designates which clones are entered in the trial. Selected cultivars and clones in the early trial are grown and managed for an early harvest (July/Aug). The 2007 trial compared 4 local reference varieties to 14 new clones. The summer was consistently hot in 2007, especially July. This year’s trial produced a lot of round-shaped tubers, many with spotty russeting. 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. Fresh Market Standout(s): A0008-1TE Process Market Standout(s): PA00N14-2, A96814-65LB Suggested Discards: A99073-1, PA98NM39-1, PA99N82-4 Standcounts ‣ 40 Day Fast emergence: Ranger Russet (98%) and Russet Norkotah (97%). Slow emergence: PA99N2-1 (28%) and A97066-42LB (30%). ‣ 50 Day Full emergence: Most entries had 95% or higher emergence at 50 days. Poor emergence: A97066-42LB and AO96305-3 (88%). Plant and Tuber Growth & Development ‣ Stem Number Per Plant – Above Ground Most: Russet Norkotah (2.2) and A98345-1 (2.1). Least: A97066-42LB (1.2), Russet Burbank and A99073-1 (1.3). ‣ Average Tuber Number Per Plant Most: PA00N14-2 (7.7) and PA98NM38-1 (7.3). Least: A99073-1 (3.8). ‣ Average Tuber Size (oz) Largest: Shepody (9.6) and PA00N15-2 (9.1). Smallest: A97066-42LB (5.0) and PA98NM38-1 (5.1). ‣ Undersized Tubers (< 4 oz) Most: PA98NM38-1 (83 CWT/A) and A97066-42LB (78 CWT/A). Fewest: Shepody (14 CWT/A). 2007 Potato Cultivar Evaluations 20 WSU Potato Research Group
Page 1 and 2: 2007 Potato Cultivar Yield and Post
Page 3 and 4: Table of Contents Introduction.....
Page 5 and 6: INTRODUCTION The 2007 Washington
Page 7 and 8: 2007 Growing Season Temperatures Ap
Page 9 and 10: OVERALL CULTIVAR & CLONE PERFORMANC
Page 11 and 12: ADVANCED LINES - REGIONAL TRIAL Pro
Page 13 and 14: At-Harvest Grading Comments & Fresh
Page 15 and 16: Fresh Market Value - Methods Econom
Page 17 and 18: 2007 Postharvest Procedures Early H
Page 19: Calculation of Total Score - The ov
Page 23 and 24: ETS 2007 Early Harvest Tri-State Tr
Page 29 and 30: ETS Tubers Fries WA Early Harvest T
Page 31 and 32: ETS Tubers Fries WA Early Harvest T
Page 33 and 34: ETS Josh Rodriguez gives a new mean
Page 35 and 36: LTS 2007 Late Harvest Tri-State Tri
Page 45 and 46: LTS Tubers Ranger Russet WA Late Ha
Page 47 and 48: LTS Tubers A98345-1 WA Late Harvest
Page 49 and 50: LTS Tubers PA00N15-2 WA Late Harves
Page 51 and 52: LTS Tubers PA99N82-4 WA Late Harves
Page 55 and 56: LTS “A meeting of the minds” du
Page 69 and 70: ERT 2007 Early Harvest Regional Tri
Page 71 and 72:
ERT 2007 Early Harvest Regional Tri
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
ERT Tubers Fries WA Early Harvest R
Page 79 and 80:
ERT Tubers Fries WA Early Harvest R
Page 81 and 82:
Page 83 and 84:
LRT 2007 Late Harvest Regional Tria
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
LRT Tubers Ranger Russet WA Late Ha
Page 95 and 96:
LRT Tubers AC96052-1Ru WA Late Harv
Page 97 and 98:
LRT Tubers AOTX95265-3Ru WA Late Ha
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
LRT Late Harvest Fresh-Processing E
Page 115 and 116:
RED & SPECIALTY 2007 Red and Specia
Page 117 and 118:
RED & SPECIALTY ‣ For oven baked
Page 119 and 120:
RED & SPECIALTY 2007 Regional Red a
Page 121 and 122:
RED & SPECIALTY 2007 Regional Red a
Page 123 and 124:
RED & SPECIALTY Tubers WA Red and S
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
RED & SPECIALTY 2007 Washington Reg
Page 135 and 136:
RED & SPECIALTY 2007 Washington Reg
Page 137:
Index of Clones and Cultivars Early
show all

2007 - Potatoes at WSU - Washington State University

Create successful ePaper yourself

Delete template?

Save as template?