- Oregon Potato Variety Trials
1981
Special Report 674
December 1982
Agricultural Experiment Station
Oregon State University, Corvallis
OREGON POTATO VARIETY TRIALS -- 1981
A.R. MOSLEY, M.J. JOHNSON, G.E. CARTER,
C.E. STANGER, AND D.C. HANE
INTRODUCTION
Potato selections were compared in some 15 tests at four branch
experiment stations, at the OSU main campus, and on three commercial farms
in the Columbia Basin. Selections tested were obtained primarily from
the USDA potato breeding program at Aberdeen, Idaho, but also from colleagues in Colorado, California, North Dakota, Washington, and elsewhere.
Most of the seed used was produced at the Central Oregon Station and
stored at Klamath Falls. Except for the Statewide Trial, Malheur tests
used seed supplied by the Aberdeen program.
Virus diseases were severe in most tests in 1981 and doubtless
biased results. The reader, therefore, should pay particular attention to
disease readings when presented. Steps have been taken to reduce viral
problems in future trials. Ninety-six entries were evaluated in 1981
(Table 1). Several of these showed promise in earlier tests in Oregon.
Crops were grown using cultural and pest control procedures common to the
areas. Standard statistical and data collection techniques were employed.
The 1981 Trials were a combined effort of the Central Oregon (Powell
Butte), Hermiston, Klamath Falls, and Ontario branch stations, and the
Crop Science Department at Oregon State University. Individual tests
included: (1) the Oregon Statewide Trial which included some 50 entries
at up to four locations; (2) the Western Regional Trial; (3) three on-farm
trials in the Columbia Basin; (4) two tests at the Malheur (Ontario) Station; and (5) the Willamette Valley Trial at Corvallis.
2
TABLE 1. Potato Selections Tested in Oregon, 1978-81
Selection
1978
A66102-12
A66102-16
A66107-51
A66122-3
A6789-7
-K
-K
A67142-1
A68710-5
A69173-2
A69327-5
A69657-4
HK
--HK
HKO
A69827-5
A69827-15
A69868-2
A69870-3
A69870-6
-HK
--
A69870-10
A70270-3
A70286-2
A70283-24
A70319-11
-HK
--HK
A70365-6
A70365-27
A70383-24
A711076-19
A7203-3
A72240-5
A7248-13
A7269-7
A7273-3
A72301-1
A72320-11
A72320-35
A72322-10
A72329-15
HKO
HK
HK
-HK
Locations Testedli
1979
1980
-HO
HKM
HK
HK
HKMO
K
--
--
M
K
0
K
HKM
-HK
HKMO
HKMO
HKM
-K
HKO
HK
K
HKM
L
L
--
L
-HKMO
K
HKOP
-HKOP
M-L
E-M
-HKMO
HKMO
Comments31
Lt. rus. Lge, rgh.
Long, rgh. Deep eyes. Poor.
Ob. rus. Dumbells. Poor.
Long rus. Knobs. Int. disc.
Long W. Purple flecks.
M
0
-HKOP
HKOP
L
?
E-M
E-M
M
HKMO
0
HKMO
M
HKM
L
E
M-L
M
M-L
M
L
M
R-0, rus.
R-0, rus.
Flat. Thick skin.
Lge. Rgh.
Huge: R-0, Rus. Rots?
0., rus. Rgh? Good skin.
0., lt. rus. OK.
Rgh. Rots. IN.
Rgh skin. GC. Poor.
Lge rus. HH.
Dark rus. HH. Sugar end.
Long, rgh. rus.
R-0. lt. rus.
Pointed.
Deep eyes.
0
M
M
L
Fair. HH. Sugar end.
Lge., some flat and pointed.
K
HKM
M
E
Rgh.
K
0
0
M-L
M
E
E-M
E
A72331-10
A72331-14
A72331-17
A72421-4
A72450-9
0
A72545-2
A72545-3
A72596-6
A72601-?
A72602-2
HK
HK
-HK
K
HKM
K
KM
H
HKMO
A72605-2
A72619-7
A72643-3
A72665-22
A72685-2
HK
HK
--
K
HKM
--
0
0
HKMO
0
HKMO
HKMO
0
HKOP
HKOP
L
I
E
E
E-M
--
L
KOP
0
0
M-L
M-L
M-L
L
KOP
Scab.
L
M
M-L
KP
Long, lt. rus. Smooth.
0., med. rus. Rgh. Poor.
White. Rgh. G. Deep Eyes.
M-L
M
HKMO
HKMO
HKMO
HM
--
0
0
MaturityV
M-L
E
M
HKMO
--
0
0
0
0
0
0
0
0
1981
GC.
R-0., coarse rus. Shatter.
R-0, rus. Smooth.
Semi-rus.
Fair.
R-0. It. rus.
Smooth.
Rgh skin. HH.
0, rus. Thick skin.
Lt. rus.
Blocky rus.
Scab?
Fries?
3
TABLE 1 (cont)
Selection
A72687-11
A7302-1
A7346-11
A7353-3
A7353-16
A7353-25
A7358-3
A7393-2
A73143-4
A73175-6
A73373-6
A73400-3
A73414-15
A7403-3
A7411-2
A7419-2
A7444-3
A7465-8
A7474-12
A7478-I
A7487-3
A7487-5
A7497-3
A74104-1
A74104-8
1978
0
0
0
0
Locations Tested?'
1980
1979
M
K
HKM
-HKM
0
0
0
0
0
0
-HKMO
0
-HKOP
0
0
0
0
HKMO
HKMO
0
KOP
0
HKMO
HKOP
HKOP
--
0
HKOP
0
0
0
Maturity4
0, lt. rus.
L
L
E-M
E-M
E-M
0-L. it. rus. Int. flecking.
Lt. rus. Small. HH.
Smooth.
Lge. Flat. Deep eyes.
Lt. rus. Large.
E
M-L
L
L
M-L
R. Deep eyes. GC. Poor.
Long, flat. Poor.
R-0. Dark rus. Lge. Poor.
E
M-L
E
E
M
E-M
M-L
L
M-L
0
HKMO
HKMO
-0
HKMO
0
HKOP
M-L
0
HKOP
0
K
0
0
0
0
0
White.
G.
Ugly.
R-0. Lt. rus. Poor.
O. Dark rus. Smooth.
M
0
0
Lt. rus. Fair.
R. W. Shatter. Lent.
O. Dark rus. OK.
O.
-0
0
HKO
--
A74127-2
A74129-4
A74143-9
A74183-I
A74195-2
Smooth.
No yield. Poor.
Lt. rus. GC. Poor.
?
M
0
0
0
0
0
A74112-1
A74114-4
A74117-9
A74124-3
A74126-5
Semi-rus
M-L
M-L
E
0
Comment4
E-M
L
E-M
E
M
-HKMO
HKMO
-K
0
A74389-1
A74391-1
A74393-1
A74393-7
A74396-1
-HKMO
0
--
0
HKMO
HKM
0
HKMO
A74104-14
A74104-18
A74106-10
A74108-1
A74109-8
A74204-4
A74212-1
A74265-2
A74341-4
A74343-1
1981
0
--H
KOP
-HKOP
M-L
E-M
E
L
L
M-L
Poor.
R-0.
White.
R-0.
R-0.
Flat rus. Light.
White to it. rus.
Crescent-shaped. Rgh.
Good long rus.
L
E
R-0.
Rus.
R-0.
Rus.
E
Flat.
Good.
Good.
Poor.
4
TABLE 1 (cont)
Selection
1978
Locations Tested-1/
1979
1980
A74404-3
A74406-2
A74416-8
A74441-3
A74541-1
0
0
0
A74543-5
A74544-1
A74585-17
A74595-11
A74595-15
0
A74595-17
A74596-7
A74626-1
A7518-8
A7578-1
0
0
0
0
0
M-L
0
Commentsql
R-0.
Lt. rus.
Good.
L
0
L
0
M-L
L
E
0
0
0
0
0
0
0
0
0
A7637-12
A76153-2
AD7267-1
AD7377-1
A07386-1
Maturityaj
L
E-M
E
M-L
M-L
0
A75195-2
A75291-3
A75291-4
A75383-1
A7637-8
Allagash
Atlantic
86987-201
87024-81
BA9309-1
HKOPW
-0
A7578-5
A7589-2
A7596-1
A75182-1
A75188-3
AD74135-1
AK28-8
AK38-2
ALR4-1
ALR22-2
HKMO
1981
-H
HO
-HKMO
W
0
-HKO
0
-HKMO
0
-HK
-HO
--
-HKMOW
-HO
0
HW
HKW
HW
--
-OP
HKOP
0
HKOP
-HKOP
-0
-HKOP
HKOP
-0
L
Small rough rus.
E-M
M-L
E-M
M
R-0.
Rus.
Dark rus.
GC.
Scab.
Blocky.
Good.
M
M
L
M
M
M-L
Fair russet. Flat.
Lt. rus. Flat.
0
0
HKO
HKOPW
KOP
M-L
M-L
M
M-L
HKOP
__
HKOP
HKOP'
L
O. rus. Fair. Fsh. mkt.?
L
R. W. Knobs.
R-0. Lt. rus.
R-0. Lt. rus.
W
E
W
E
M
M
E
M-L
KOW
Smooth. Ob. rus.
Poor.
Good,
Scab?
Rus. Fair. Low yields.
R. rus. Chipper.
R-0.
White.
Scab.
W
BC9071-6
Belchip
Belrus
Bintje
Bison
-HK
-HKMW
W
--
W
W
KOPW
Butte
Centennial
Chieftan
Chipbelle
Crystal
HO
HK
HK
-W
HKMOW
HK
HKM
-HW
HKMO
-HKMO
HKOPW
-HKOP
W
M
0
--
W
W
M-L
E
M-L
E
E
M
M
R. Lt. rus. G.
R. White. Yellow flesh.
Red. Smooth, small. Metribuzin.
O. Rus. Smooth.
Dark rus. Low yields.
Oblong red.
R.
White.
Chipper.
HH.
5
TABLE 1 (cont)
Selection
Locations Tested
1981
1980
1979
1978
Haig
Haig (New )
Kennebec
Lemhi
Monona
Nampa
ND55-7
ND137-2
ND258-1
ND274-6
W
W
W
W
W
W
W--
W
HW
Dakchip
Delta Gold
Denali
FL162
FL1168
HW
--
--
W
HKO
--
HK
W
W
HW
HKMOW
W
HKMOW
W
--
W
HKOP
W
W
HK
W
KP
HKOP
HKOP
ND467-3
ND541-2
ND561-1
ND638-1
ND8850-2
ND9474-6A
NDA451-2
NDA514-2
NOA8694-3
NDA9249-3
NOD47-1
ND0110-4
Nooksack
Norchip
Norgold
Norland
Pioneer
R. Burbank
Red LaSoda
Sangre
Superior
Targhee
TND14-1
TXA17-1
TXA83-1
M
M
M
M
M
Round. White. Chipper
R. White. Yellow flesh. Chipper.
R. White. Chipper.
R. White. Chipper.
R. White. Chipper.
E
M
R. White. Early chipper.
Later than Haig.
Oblong. White.
0-L. Rus. Good. Do not store.
R-0. White. Chipper.
L
Long. Lge eyes.
R. Rus. Dark. GC. Poor.
Metribuzin.
L
Oblong. Russet.
Centennial type.
W
--
0
W
HOP
0
0
HKO
W
OW
HKMOW
HKMOW
HKMO
H
HKMW
HW
HKMO
W---
W
H
KW
W
HOW
HKOPW
HKMO
W--
-0
0
HO
STANDARD
-HKMO
HO
HO
HK
W
HKM
0
0
E-M
E-M
E
N
L
HKOP
--
HKOPW
--
HKOP
HKMO
W--
--
O
0
0
TXA218-2
TXA218-5
TXA218-7
TXA226-1
TXA331-1
TXA549-1
W541-2
W630-5
W641-11
W667-10
HKOPW
--
Maturity' Comments'
--
HKOP
L
M
E-M
E
M-L
M
L
M-L
R. Blocky russet.
R. Lt. rus. Rgh.
Hollow.
R-0. Lge. Lt. rus. Skin cracks.
R. W. Small. Deep eyes. Chipper.
Early. R. russet.
Early red.
Early oblong red.
Long rus.
Red.
Round red. Stores well.
Early round white.
R-0. Dark. Coarse net.
E-M
E-M
M
Red. Rgh. Scab.
M-L
M-L
HKMO
HKMO
HKMO
KM
Dark. Rgh. Poor.
Long, large white. Scab. OK.
R-0. Lt. rus.
-HKOP
E-M
6
TABLE 1 (cont)
Selection
W670-3
W701-14
W708-5
W720-2
W730-2
WC435-3
WC521-12
WC612-13
WC672-2
WD 630-4
1978
Locations Testedli
1980
1979
1981
H
HKM
H
KM
-HKMO
-HKMO
M
--
HO
HO
WD641-10
HKMO
HK
H
HO
-H
MaturityV
L
L
E
M-L
L
Comments'
Smooth. Oval. HH. GC.
R-0. Rgh. Dk rus. Poor.
R. White. Smooth.
R-0. Rus. Good?
-HKOPW
KOP
HO
KOP
M-L
L
E-M
R-0. Dk rus. Attached stolons.
R. White.
R. Lt. rus.
R. Flat. Rus.
KOP
M-L
R.
Dark rus.
11H = Hermiston; K = Klamath Falls; M = Madras; 0 = Ontario; P = Powell Butte; W = Willamette
Valley at Corvallis.
= early; M = midseason; L
late.
SIN = internal necrosis; G = sun green; GC = growth cracks; HH = hollow heart; L round; Rus = russet skin; W = white skin.
light-colored; 0 = oblong; R
long; Lt =
OREGON STATEWIDE TRIAL
Four similar plantings sharing approximately 40 selections in common
were made at the Central Oregon (Powell Butte), Columbia Basin (Hermiston),
Klamath (Klamath Falls) and Malheur (Ontario) branch experiment stations.
Crops were grown using commercially accepted cultural practices which
varied slightly depending on the location. Individual plots were single
rows ranging from 20 to 30 feet (1 ft. = 0.3048 m) long. Entries were
replicated four times in a randomized block design.
Selections in the Powell Butte trial were fried at 350°F (176.6°C)
for four minutes on December 4 after four weeks of storage at 55°F (12.8°C),
followed by three weeks at 50°F (10°C).
Seed for the 1981 Statewide Trial and most other Oregon varietal
tests was less than satisfactory due to a high incidence of mosaic-type
viruses, primarily PVX and PVY. High virus levels were caused primarily by
virus-contaminated parent stock which was not detected in serological
tests during the fall of 1980. This factor should be considered when
interpreting results.
HERMISTON
Yields in the Hermiston (Columbia Basin) test were extremely high
due in large part to the extremely long growing season and sandy soils.
Commercial Russet Burbank fields in the Basin average about 25 tons per
acre (1 T/a = 2.2432 metric T/ha),with new fields often yielding up to
35 tons.
Columbia Basin production is geared toward the frozen french fry
market and relies primarily on Russet Burbank for late-season and out-
8
of-storage processing. Factors such as high specific gravity, good fry
color, and long storage life are therefore crucial to the success of a
new variety. Some 25 percent of Oregon's Columbia Basin production enters
fresh market channels, however, particularly early Norgold Russets.
Procedure: Thirty-five selections and varieties were planted in
loamy fine sand on the Hermiston (CBARC) station on April 7. Seedpieces
were spaced nine inches (1 in = 2.54 cm) apart in 34-inch rows. Plots
were single rows 25 feet (1 ft = 0.3048 m) long, replicated four times in
a randomized block design.
The planting was fertilized by banding 100 pounds N, 150 P 20 5 , 150
K2 0, 50 S, and 1 pound B per acre (1 lb/a = 1.2 kg/ha) at planting. Additionally, 50 pounds of nitrogen were broadcast on June 2, again on June 17,
and finally on July 18, for a total seasonal N rate of 250 pounds per acre.
Dyfonate for wireworms was banded over rows and incorporated by rototilling on March 24, approximately two weeks before planting. Foliar
insects were controlled by a combination of Imidan on May 8, side-dressed
Temik on May 12, and Monitor on July 8 and August 6. Metribuzin was used
for weed control, and vines were killed with Dinitro on September 9. All
chemicals were applied at commercial rates. Tubers were harvested on
September 21.
Results: Large differences in yield and quality were evident among
the 38 entries (Table 2). Based on yield and external appearance, A69870-3,
A69870-6, A72545-2, A74212-1, A74393-1, A74404-3, A7596-1, Butte and Targhee
appeared to be promising, A7596-1 was particularly impressive despite a tendency toward large tubers.
Virus infection levels ranged from extremely low to very high. Yields
and grade-out were probably affected. Some entries, such as A72545-2,
yielded well despite a high disease incidence (60%).
TABLE 2. Yield and Quality Characteristics, Statewide Trial,
Hermiston, 1981
Oz.
Tuber
Specific
Gravity
3
6
1
1
2
8.4
9.8
8.6
10.0
11.8
1.084
1.087
1.082
1.080
1.075
6% Mo.
Good 0-L, Lt. rus.
Poor.
G.
White. Scab.
Blocky rus.
Good.
Late.
Rus.
R-0.
60% Mo.
R-0. Lt. rus.
88
83
76
83
83
3
3
3
5
10.6
10.9
7.2
9.2
10.7
1.087
1.078
1.081
1.079
1.072
30% Mo.
Dk. Rus.
Fair.
18% Mo.
Poor. R-0. Dk. rus.
Fair.
Early Lt. rus.
G.
Lent.
Shatter.
RW.
40% Mo.
Ugly.
White.
O.
869
768
683
183
803
73
89
93
76
88
12
3
2
6
4
10.9
9.5
9.1
9.7
8.5
1.075
1.078
1.083
1.074
1.081
6% Mo.
Poor.
White.
R-0.
Late.
Good Long Rus.
Flat.
Rus.
R-0.
Good.
90% Mo.
Rus.
R-0.
Scab.
Late.
Rus.
R-0.
252
291
744
481
543
311
326
841
546
590
81
89
88
88
92
5
3
7
4
3
7.1
7.7
12.7
9.8
10.9
1.078
1.080
1.084
1.079
1.079
79% Mo.
Rus.
Rgh.
Small.
GC.
Scab.
Rus.
R-0.
Dk. rus.
Good Blocky.
Flat.
Fair rus.
9% Mo.
Lt. rus.
Flat.
AC67560-1
AD74135-1
AK38-2
ALR4-1
Butte
557
518
338
446
703
610
640
552
530
767
91
81
61
84
92
3
7
22
1
1
10.2
8.3
7.6
7.7
7.4
1.074
1.079
1.078
1.092
1.086
Scab.
Red.
Fair.
Rus.
0-L.
27% Mo.
Knobs. Poor.
Scab.
Good Lt. rus.
Rus.
O.
Fair-Good. Chieftain
Lemhi
ND137-2
ND451-2
ND561-1
586
469
220
404
540
632
568
322
439
619
93
83
68
92
87
3
8
5
1
4
9.4
11.3
5.4
11.2
11.1
1.071
1.079
1.068
1.072
1.078
12% Mo.
Oblong.
Red.
51% Mo.
Good blocky rus.
G.C. 18% Mo.
Dk. Poor.
R. Rus.
21% Mo.
R., Blocky rus.
36% Mo.
Late.
Rus.
O.
ND638-1
Norgold
Pioneer
R. Burbank
R.B., 1978
Gen. 1
180
369
297
420
211
417
347
576
85
88
85
73
3
1
2
16
6.9
8.2
7.7
8.8
1.073
1.077
1.074
1.086
45% Mo.
Cent. Type.
27% Mo.
Good.
Rus.
R-0.
Red.
Oblong.
Good.
100% Mo.
Knobs.
Long rus.
457
754
61
21
9.4
1.083
Long rus.
T226-1
Targhee
WN630-5
LSD, .05
421
710
577
147
567
810
670
155
74
88
86
--
10.1
9.5
13.1
--
1.064
1.084
1.081
0.005
Rgh.
Scab.
Red.
Oblong.
Dark rus.
Scab.
Long White.
Selection
Yield, Cwt/AY Percent
No.2
No.1
Total
No.1
A69173-2
A69657-4
A69870-3
',19870-6
A72545-2
407
624
666
621
655
469
806
709
670
715
87
77
94
93
92
A72602-2
A7403-3
A7487-3
A7487-5
A74104-8
533
672
294
357
581
608
806
386
430
699
A74124-3
A74212-1
A74393-1
A74396-1
A74404-3
635
684
635
138
704
A7518-8
A7578-5
A7596-1
A75291-3
A75291-4
7
6
5
5
OK.
CWT/A x 0.112 = T/ha.
green; GC = growth cracks; L = long; Lt = light-colored; Mo = mosaic;
Dk = dark-colored; G
0 = oblong; R = round; Rgh = rough; Rus = russet; W = white.
10
CENTRAL OREGON (Powell Butte)
The Central Oregon growing season is short and cool. Therefore, latematuring selections tend to perform poorly. The Central Oregon crop is
marketed mainly as seed, but a substantial portion enters fresh market
channels.
Procedure: Fifty selections, including those tested at Hermiston,
were planted in Deschutes Sandy Loam. Seedpieces treated with Captan were
spaced 9 inches (1 in = 2.54 cm) apart in 36-inch rows. Plots were single
rows 15 feet (1 ft = .3048 m) long. Each entry was replicated four times
in a randomized block design.
Fertilizer, 1000 lbs/acre (1 lb/a = 1.12 kg/ha) of 16-16-16, was
banded at planting. Weeds were controlled by Eptam pre-plant and cultivation. Monitor was used for insects. Tubers were harvested on October 12.
Fry tests were performed on December 4, using tubers stored 4 weeks
at 55°F (12.8°C) followed by three weeks at 50°F (10°C). Slices were fried
4 minutes at 350°F (176°C).
Results: Virus mosaics confounded results (Table 2), as was the case
at Hermiston. The same seed lots were used at all four Statewide test
sites.
Entries showing promise included A69657-4, A70365-27, A69870-6,
A69870-3, A72545-2, A72602-2, A72685-2, A74393-1, and A74404-3; several
of these also performed well at Hermiston. A696570-4 yields were high and
fry quality was good, but tubers were too rough and scabby.
Several selections showed better French fry color than Russet Burbank.
A69657-4, A69870-3, A72545-2, A7403-1, and A74404-3 all produced lightcolored fries. Low specific gravity could eliminate A74404-3 and A72545-2
as processors, however.
11
TABLE 3. Yield and Quality Characteristics of Fifty Selections
and Varieties, Powell Butte Statewide Trial, 1981
Selection
Rank
Yield, Cwt/A :li
No.1
Total
%
No.1
Oz
Tuber
Specific
Gravity
N.H.
Ave. Fry
Color
Local Russet
Bison
Butte
Chieftan
Lemhi
14
47
21
10
15
496
296
466
507
493
308
201
349
416
403
62
75
75
82
82
4.7
6.3
5.5
6.3
8.7
1.086
1.066
1.085
1.065
1.088
4.8
0
0
0
0
2.4
2.5
3.8
3.3
3.1
Norgold
79 VTSC
Pioneer
Targhee
A69173-2
40
23
41
27
38
326
454
325
438
336
253
323
266
344
253
78
66
82
79
75
5.9
4.9
8.5
5.4
5.5
1.070
1.086
1.069
1.079
1.078
0
5.4
0
0
0
3.5
2.0
3.3
3.3
3.3
A69657-4
A69870-3
A69870-6
A70365-27
A72545-2
1
11
18
13
12
722
506
479
497
501
526
416
419
427
403
73
82
88
86
81
7.5
7.1
8.5
6.9
7.4
1.085
1.079
1.083
1.091
1.078
0.8
0
0.8
1.2
0
1.9
1.7
2.5
2.9
1.9
A72602-2
A72619-7
A72685-2
A7403-3
A7474-12
19
36
9
29
2
476
375
510
430
602
417
284
414
375
405
88
76
81
87
67
6.5
5.6
7.8
7.6
8.6
1.090
1.077
1.086
1.081
1.079
1.4
0
0
2.1
1.8
2.8
2.8
3.7
1.4
3.1
A7487-3
A7487-5
A74104-8
A74124-3
A74212-1
28
32
24
8
4
433
415
444
513
538
305
318
345
373
415
71
77
78
73
77
6.0
8.4
7.7
9.0
5.9
1.082
1.087
1.082
1.072
1.073
0
1.5
0
0
0
3.7
3.9
3.3
4.0
3.6
A74393-1
A74396-1
A74404-3
A74626-1
A7518-8
6
48
7
35
43
527
268
525
397
318
466
178
416
303
205
88
66
79
77
65
7.0
7.6
8.0
7.8
5.1
1.083
1.080
1.077
1.082
1.084
0
1.2
3.2
0
9.9
3.3
3.9
1.0
2.6
3.6
A7578-5
A7596-1
A75291-3
A75291-4
AC67560-1
(Sangre)
44
16
39
26
17
310
481
329
439
480
222
355
271
373
388
72
74
83
85
81
6.9
5.8
9.1
8.7
6.0
1.084
1.087
1.073
1.073
1.065
4.3
1.0
0
0
0
3.6
2.8
4.0
3.1
3.9
AD7377-1
AD7386-1
A074135-1
AK38-2
ALR4-1
22
37
3
31
20
462
358
572
418
474
383
227
403
285
369
83
63
70
68
78
8.3
8.9
8.9
5.5
6.2
1.071
1.072
1.077
1.089
1.086
3.3
3.4
4.0
0.8
2.0
ND137-2
ND451-2
N0561-1
ND638-1
T226-1
42
25
30
46
5
323
442
425
279
534
164
361
347
206
387
51
82
82
74
73
4.7
8.4
7.2
4.7
9.3
1.069
1.071
1.079
1.074
1.063
3.6
4.0
2.9
2.6
3.9
1.5
12
TABLE 3 (cont)
WC521-12
WC612-13
WD630-4
WD641-10
WN630-5
Average
LSO, 0.05
Specific
Gravity
Ave. Fry
?!
Color
Rank
Total
No.1
No.1
Oz.
Tuber
50
34
49
45
33
224
411
236
292
413
123
299
149
230
315
55
73
63
79
76
5.7
6.6
6.9
7.5
12.1
1.087
1.088
1.084
1.082
1.085
0
1.2
6.0
0
0
1.5
1.3
2.2
3.3
3.9
430
108
328
108
76
7.1
1.5
1.079
.004
1.0
4.4
3.0
0.9
Yield, Cwt/A11
Selection
%
H.H.
Cwt/A x 0.112 = T/ha.
?/ Values based on the USDA Color Standards for Frocon French Fried Potatoes,
3rd Edition. Low values = light-colored fries.
13
KLAMATH FALLS
Procedure: Fifty entries were compared in the Klamath Falls Statewide Trial in 1981. The crop was grown using production and pest control
procedures commercially accepted in the Klamath Basin.
Results: Yields were unusually low for the Klamath Falls area (Table 4).
Low productivity was probably due in part to virus-infected seed, but other
factors must have also been involved. For example, metribuzin phytotoxicity caused considerable damage to TX226-1, Bison, Chieftan, Pioneer, Sangre,
and probably others. Entries showing some yield potential included A696577-4,
A72685-2, A7403-3, A74104-8, A74212-1, and AD74135-1. Since Klamath Basin
potatoes are grown primarily for fresh market, A74104-8, A69657-4, A7403-3,
and 74104-8 would be of little value since tuber shape and skin color were
unacceptable (Table 6). A74212-1 probably has more potential than any of the
other new selections since it not only yielded well but also produced attractive, long, russet tubers.
Specific gravities of some entries were extremely low, possibly because
those selections were not mature at harvest. Extremely late varieties cannot be grown profitably in the Klamath Basin due to the short growing season.
ONTARIO
Malheur County potatoes are used for frozen French fries and, to a
lesser extent, for tablestock. Length of season is intermediate between
the Columbia Basin and Central Oregon. Commercial yields average about
18 tons per acre.
Procedure: Forty-five selections were compared at the Malheur experiment station in 1981. Seedpieces were planted nine inches apart in 36-inch
14
rows on April 23. Plots were single rows 18.5 feet long, replicated
three times.
The silt loam soil (pH 7.3, O.M. 1.2%) was amended with 100 pounds
P 0 and 60 pounds N per acre (1 lb/a = 1.12 kg/ha), broadcast and plowed
2 5
down in the fall of 1980; 150 pounds per acre of N as ammonium nitrate was
sidedressed at planting. Weeds were controlled by Roneet (cycloate)
broadcast in the fall of 1980 at 4 pounds ai/a and disc-incorporated before
bedding. Temik (aldicarb) was sidedressed at 3 pounds ai/a at planting.
Plots were furrow-irrigated as needed. Vines were removed by rotobeating
on October 6. Harvest was on October 16.
Results: Mosaic viruses were readily evident in many of the select-
ions, with percent infection ranging from 0 for several entries to 88 percent for WC521-12 and ND638-1 (Table 5).
Selections showing good US No. 1 yields included A7474-2, A74212-1,
A69870-3, AC6750-1 (Sangre), A72602-2, A75291-3, A74404-3, A69870-6,
ND451-2, WN630-5, Russet Burbank, and ALR4-1.
SUMMARY
Fifty-one selections and varieties were grown at one or more sites
in the 1981 Statewide Trial. Seed of some of the entries was severely
infected with virus. Yields were probably affected by differences in
virus levels.
Several selections appeared to have promise (Table 6). A69870-6,
A72602-2, A74212-1, A74393-1, A74404-3, Butte, Sangre, and Targhee produced good yields of tubers sufficiently attractive for fresh market use.
Most of these entries fried too dark or had specific gravities too low
for processing purposes. A69657-4, A69870-3, A72545-2, A7403-3, and
15
TABLE 5. Yield and Grade of 45 Potato Selections and Varieties,
Malheur Statewide Trial, 1981
Selection
US No. 1 1/
Percent
Cwt/A
2's
Culls
Total
Cwt/A
Mosaic
o
A69173-2
A69657-4
A69870-3
A69870-6
A72602-2
320
396
512
428
462
89
92
92
88
91
0
2
3
0
4
11
6
5
12
5
358
432
556
484
510
6
14
0
0
18
A72619-7
A7403-3
A7474-12
A7487-3
A7487-5
140
400
650
176
346
77
93
93
84
94
0
0
1
2
0
23
7
6
14
6
182
430
698
210
370
40
20
0
0
0
A74104-8
A74124-3
A74212-1
A74393-1
A74396-1
406
416
504
376
406
93
86
92
87
90
0
1
2
3
4
6
13
6
20
6
432
486
546
430
450
36
28
0
16
72
A74404-3
A74626-1
A7518-8
A7596-1
A75291-3
432
304
162
300
448
85
82
75
90
91
4
11
6
2
4
12
7
19
9
5
510
372
216
334
492
4
?
64
0
4
A75291-4
AD7386-1
AK38-2
ALR4-1
Atlantic
360
396
318
450
316
92
84
85
90
95
2
11
12
0
1
7
5
4
10
4
392
472
376
302
546
8
18
20
0
0
Bison
Butte
Chieftan
Lemhi
NO137-2
232
460
286
248
242
90
85
83
84
56
3
3
9
1
28
7
13
3
14
16
258
544
344
294
430
20
0
6
38
18
NO451-2
N0561-1
N0638-1
Norgold
Pioneer
478
300
238
234
330
94
91
89
89
86
1
0
2
0
9
5
9
9
11
5
508
330
268
262
384
10
58
88
22
42
R. Burbank
1979 Gen 1.
R. Burbank
1978 Gen 1.
Sangre
Targhee
TX226-1
460
83
8
9
556
2
296
83
6
12
358
8
494
308
404
93
81
83
2
0
12
6
19
5
534
380
488
6
0
2
W630-5
WC521-12
WC612-13
WD630-4
WD641-10
452
218
200
176
358
97
86
86
86
92
0
6
2
0
2
3
8
12
14
6
468
254
232
204
388
8
88
8
60
2
IL
—Lwt/A x 0.112 = T/ha.
16
74404-3 produced acceptable fries but had various shape or skin deficiencies. None of the selections was outstanding in 1981. Many will be
entered in 1982 trials.
•
•
17
TABLE 6. Average Performance of 51 Selections and Varieties at Four Locations,
Statewide Trial, 1981
1/
No. 1 Yield, Cwt/A Specific Gravity
KF
PB
H
PB Avg.
0
KF
Avg.
%31 Fry-4%-3-/
HH Color Mosaic
Comments)
Selection
H
A69173-2
A69657-4
A69870-3
A69870-6
A70365-27
407
624
666
621
--
216
348
219
256
240
320
396
512
428
--
253
526
416
419
427
299
473
453
431
--
1.084
1.087
1.082
1.080
--
1.076
1.084
1.067
1.061
1.086
1.078
1.085
1.079
1.083
1.091
1.079
1.085
1.076
1.075
--
0
0.8
0
0.8
1.2
3.3
1.9
1.7
2.5
2.9
6
14
0
0
Good O-L, Lt. Rus.
Poor.
G.
Scab.
White.
Rus.
Blocky.
Good.
Late.
Rus.
R-0.
----
A72545-2
A72602-2
A72619-7
A72685-2
A7403-3
655
533
--
--
672
240
293
157
376
319
--
462
140
--
400
403
417
284
414
375
--
426
--
--
441
1.075
1.087
--
--
1.078
1.080
1.089
1.081
1.081
1.068
1.078
1.090
1.077
1.086
1.081
1.078
1.089
--
--
1.076
0
1.4
0
0
2.1
1.9
2.8
2.8
3.7
1.4
60
30
40
--
20
Rus.
Lt.
R-0.
Fair.
Dark rus.
---Rus.
Oblong.
Rus.
Dark.
R-0.
A7474-1
A7487-3
A7487-5
A74104-8
A74124-3
--
294
357
581
635
173
175
179
365
249
650
176
346
406
416
405
305
318
345
373
--
237
300
424
418
--
1.081
1.079
1.072
1.075
1.086
1.080
1.087
1.080
1.074
1.079
1.082
1.087
1.082
1.072
--
1.081
1.084
1.078
1.074
1.8
0
1.5
0
0
3.1
3.7
3.9
3.3
4.0
0
0
0
40
28
---Early.
Fair.
Rus.
Lt.
G.
Shatter. Lent.
R W.
Ugly.
O.W.
Poor.
White.
R-0.
A74212-1
A74393-1
A74396-1
A74404-3
A74626-1
684
635
138
704
--
398
259
159
232
--
504
376
406
423
304
415
466
178
416
303
500
434
220
446
--
1.078
1.083
1.074
1.081
--
1.081
1.073
1.068
1.066
--
1.073
1.083
1.080
1.077
1.082
1.077
1.080
1.074
1.075
--
0
0
1.2
3.2
0
3.6
3.3
3.9
1.0
2.6
0
16
90
4
?
Late.
Good long rus.
Flat.
Rus.
R-0.
Good.
Rus.
R-0.
Scab:
Late.
Rus.
R-0.
----
A7518-8
A7578-5
A7596-1
A75291-3
A75291-4
252
291
744
481
543
70
90
278
221
259
162
--
300
448
360
205
222
355
271
373
172
--
419
355
384
1.078
1.080
1.184
1.079
1.079
1.084
1.081
1.083
1.076
1.077
1.084
1.084
1.087
1.073
1.073
1.082
1.082
1.085
1.076
1.076
9.9
4.3
1.0
0
0
3.6
3.6
2.8
4.0
3.1
80
--
0
4
9
Rus.
Rgh.
Small.
Scab. GC.
Rus.
R-0.
Good blocky, dark rus.
Flat.
Fair rus.
Flat.
Rus.
Lt.
AD7267-1
AD7377-1
AD7386-1
A074135-1
AK38-2
--
--
--
518
338
235
279
293
339
146
--
--
396
--
318
--
383
227
403
285
--
--
--
--
272
--
--
--
1.079
1.078
1.070
1.074
1.078
1.080
1.083
--
1.071
1.072
1.077
1.089
--
--
1.079
1.083
-
0
0
0
0
--
3.3
3.4
4.0
0.8
--
--
18
--
27
Shatter.
Rus.
Oblong.
O. Dark Rus. Flat. OK. Shatter.
---Fair.
Rus.
0-L.
Poor.
W.
Round.
ALR4-1
Atlantic
Bison
Butte
Chieftan
446
--
--
703
586
153
209
201
222
172
450
316
232
460
286
369
--
260
349
416
354
--
--
433
365
1.092
--
--
1.086
1.071
1.079
1.085
--
1.072
1.064
1.086
--
1.066
1.085
1.065
1.086
--
--
1.081
1.067
0
0
0
20
0
12
Good.
0
0
0
2.0
--
2.5
3.8
3.3
Lemhi
ND137-2
ND451-2
NO561-1
ND638-1
469
220
404
540
180
153
134
107
180
14
248
242
478
300
238
403
164
361
347
206
318
190
337
342
159
1.079
1.068
1.072
1.078
1.073
1.078
1.068
1.074
1.081
--
1.088
1.069
1.071
1.079
1.074
1.082
1.068
1.072
1.079
--
0
0
0
0
0
3.1
3.6
4.0
2.9
2.6
51
18
21
58
88
Good, blocky rus.
Dark. GC. Poor
R. Rus.
Rus.
Blocky.
R.
Late.
Rus.
O.
Cent. type.
Norgold
Pioneer
R. Burbank
Sangre
Targhee
369
297
457
557
710
144
101
187
241
298
234
330
460
494
308
253
266
323
388
344
250
248
357
420
415
1.077
1.074
1.083
1.074
1.084
1.072
1.075
1.088
1.076
1.065
1.070
1.069
1.086
1.065
1.079
1.073
1.073
1.086
1.072
1.076
0
0
5.4
0
0
3.5
3.3
2.0
3.9
3.3
27
42
2
6
0
Early.
Rus.
R-0.
Red.
Oblong.
Good.
Knobs.
Rus.
Long.
Long dormancy.
Red.
Oblong.
Rus.
Dark.
TX226-1
W630-5
WC521-12
WC612-13
WD630-4
W0641-10
421
577
--
--
--
--
198
299
73
253
28
154
404
452
218
200
176
358
387
315
123
299
149
230
352
411
--
--
--
--
1.064
1.081
--
--
--
--
1.068
1.070
1.094
1.089
1.090
1.084
1.063
1.085
1.087
1.088
1.084
1.082
1.065
1.079
--
--
1.5
0
0
1.2
6.0
0
3.9
3.9
1.5
1.3
2.2
3.3
2
8
88
8
60
2
Rough.
Scab.
Red.
Scab.
Long white.
Shatter.
W-Lt. Rus.
R.
----
--
Lt. Rus.
---Fair-good.
Red.
O.
O.
Poor.
Scab.
Rus.
Scab.
OK.
= Columbia Basin Ag. Res. Center (CBARC) at Hermiston; KF = Klamath Falls Experiment Station at Klamath
Fall; 0 = alheur
Experiment Station at Ontario; PB = Central Oregon Experiment Station at Powell Butte.
M
Cwt/A x 0.11 Z = T/ha.
'Powell Butte site only.
2/ Based on visual symptoms at Ontario and Hermiston.
1/ Based on Hermiston Trial. Shape: L = long; 0 = oblong; W = white; G = greening; GC = growth cracks.
18
COLUMBIA BASIN (Hermiston) TRIALS
Five varietal trials were conducted by the Hermiston station in 1981.
Results of the Statewide Trial were presented earlier. The Western Regional and three on-farm trials will be discussed in this section.
ON-FARM-TRIALS
Procedure: Seven selections and varieties were compared under centerpivot irrigation in commercial fields. The test site(s) received the same
soil preparation, production, and pest control practices used on the
remainder of the field(s). Soils were sandy. Irrigation and fertilization levels were adequate to high. Rows were marked as the fields were
being planted. An assisted-feed planter was then used to plant in the premarked rows. Plots were single 25-foot rows, replicated three times in
a randomized block design. Tubers were dug by level-bed digger and picked
up by hand.
Results: Only Lemhi produced lower yields than Russet Burbank
(Table 7). Lemhi typically yields much higher than these results indicate.
Based on US No. 1 yields, specific gravities, and known French fry potential, Nooksack appeared to be the best selection. A74404-3 yielded well
and produced light-colored fries (Table 6) but specific gravity was low,
and tubers tended to be scabby at one site. A74404-3 will be tested further in 1982, especially for processing. AD7377-1 is probably not suited
to the Columbia Basin since tubers were flat and prone to shatter bruise,
and French fry color was unacceptable.
19
TABLE 7. Yield and Quality Characteristics of Potato Selections Under Commercial
Center-Pivot Conditions in the Columbia Basin, 1981
Specific
Gravity
Oz.
Tuber
Comments
712
592
513
495
573
1.078
1.076
1.084
1.087
1.091
8.5
9.9
8.4
8.4
12.7
Oblong Rus. Late. Scab.
Oblong dark rus. Flat. Shatter.
Fair-good oblong rus.
Good blocky rus. Won't store.
Round, large rus. tubers.
490
481
1.082
8.9
Typical Burbank.
519
645
595
1.082
8.0
Better than 1978 seed.
--705
460
458
401
599
604
526
529
531
544
1.081
1.081
1.081
6.8
5.9
9.3
Tubers smaller than above.
Dark, rough-skinned. Tablestock.
121
57
83
Total Cwt/A
Avg.
RF
MC
ER
No. 1
MC
A74404-3
AD7377-1
Butte
Lemhi
Nooksack
761
599
430
437
689
435
383
361
264
428
586
578
461
426
480
594
520
417
376
532
902
688
538
526
723
546
472
443
397
487
688
616
558
564
510
RB, 1978
Gen 1.
RB, 1980
Gen 1.
RB, cut
RB, whole
Targhee
330
256
373
320
505
449
506
305
484
432
622
--654
277
238
334
418
457
457
347
347
482
LSD, .05
101
63
71
Selection.–
1/
/
cwt/A?/
Avg.
RF
ER
RB = Russet Burbank. Gen 1 indicates first year seed source was increased by seed growers. Cut = typical
cut seedpieces; whole = single-drop tubers.
1/ ER = Eagle Ranch; MC = Merle Carlson Farm; RF = Royal Farms. Cwt/A x 0.112 = T/ha.
20
WESTERN REGIONAL TRIAL
Procedure: Ten entries were compared at the Columbia Basin Agricultural Research Center (CBARC) at Hermiston; these were also included
in one or more of the Ontario trials. Individual plots were single rows
25 feet long, replicated four times in a randomized block design. Seedpieces were planted nine inches apart in 34-inch rows on April 7. Metribuzin was applied at the rate of 0.5 pounds ai/a on June 4.
Results: None of the selections was outstanding (Table 8), but
A72685-2 did appear to have some potential for fresh market. Others
showing some promise included WC521-12, AD7377-1, A72545-2, and Lemhi.
Most of the selections were severely infected with mosaic viruses.
21
TABLE 8. Yield and Quality Characteristics of Western Regional Trials,
Hermiston
Percent
no.2
no.1
Oz.
Tuber
Specific
Gravity
Entry
Yield, Cwt/A1'
Total
No.1
A72545-2
A72685-2
AD7267-1
AD7377-1
AD74135-1
630
669
392
564
406
697
743
501
669
492
90
90
78
84
82
1
3
10
10
6
11.8
11.6
10,6
10.7
8.7
1.078
1.082
1.070
1.075
1.079
IN.
Scab.
O., Lt. Rus.
O. Rus.
0. Rus. Shatter.
EyesO. Dk. Rus. G.C.
O. Rus. Shatter
WC521-12
WC672-2
Lemhi
Norchip
R. Burbank
526
640
513
403
321
564
716
561
502
489
93
89
91
80
66
2
7
4
6
14
8.8
8.8
10.9
6.6
8.6
1.096
1.083
1.085
1.081
1.084
R, Lt. Rus. Shatter.
R, Rus, Scab. Ugly.
O. Rus.
R. W. Scab. Cracks.
L., Rus. Cracks. Knobs.
LSD, .05
133
147
Comments-2_/
0.005
1/Cwt/A x 0.112 = T/ha.
Ahape, skin type: 0 = oblong; R = round; L = long; R = Russet; W = white; IN =
internal necrosis; GC = growth cracks.
22
MALHEUR TRIALS
Two tests in addition to the Statewide Trial were conducted by the
Malheur station in 1981. Entries were primarily selections from the Aberdeen, Idaho, breeding program which also supplied the seed.
Procedure: The potatoes were planted on April 23 and 25 in silt
loam soil which had been partially fertilized, herbicide-treated, and
bedded during the fall of 1980. Fertilizer consisted of 100 pounds of
P 0 and 80 pounds of N per acre plowed under in the fall and 120 pounds
2 5
of additional N sidedressed at planting. Roneet (cycloate) was disc-incorporated before bedding in 1980. Temik was banded at planting. Pesticides
were applied according to label directions.
The plots were furrow-irrigated on May 24 and as needed thereafter.
During midseason, water was applied every four days in each furrow for
12 hours.
Vines were rated for maturity during the first week of October. Vines
were then removed by rotobeating on October 6, and tubers were harvested on
October 12 and graded on October 13 and 14. Cooking and specific gravity
tests were performed at Aberdeen, Idaho.
The preliminary trial consisted of 19 entries replicated three times
in single-row plots 25 hills long. Fifteen selections were evaluated in
the advanced trial in single row plots 35 hills long, replicated four times.
Results: Yields were lower than normal for the Ontario area due to
excessive water rot. Early-maturing lines were particularly prone to rots.
Only three selections -- A72665-22, A7637-12, and A76153-2 -- outyielded Russet Burbank in the Preliminary Trial (Table 9). Further testing is necessary before these selections can be fully assessed.
23
None of the entries in the Advanced Trial appeared to be an improvement on Russet Burbank (Table 10). Although WC521-12 yielded well, it is
basically a round, white potato not suited to the Malheur area.
24
TABLE 9. Yield and Quality, Preliminary Late Harvest Trial, Malheur Experiment
Station, 1981
Selection
Yield, Cwt/A"
Total
No. 1
US no. 1, ".
)10 oz.
6-10 oz.
4-6 oz.
Percent
No.2 Culls
No.1
2/
Boil ed ColorColor Yellow Dulling
Specific
Gravity
A69827-15
A711076-19
A72240-5
A72643-3
A72665-22
120
108
155
105
209
199
177
292
220
343
5
12
3
2
12
32
21
23
24
20
23
28
27
22
29
60
61
53
48
61
3
9
6
4
3
37
30
40
48
36
3.7
3.4
4.2
2.5
3.0
.09
.11
.08
.15
.02
.15
.11
.14
.09
.06
1.094
1.097
1.092
1.119
1.080
A74143-9
A74341-4
A74441-3
A74541-1
A74544-1
91
153
79
110
159
172
298
130
265
305
10
2
3
4
6
24
20
19
15
17
19
30
38
22
28
53
51
61
42
52
15
0
4
1
3
32
49
35
58
45
2.7
0.8
1.6
4.4
2.2
.03
.02
.11
.18
.07
.07
.04
.10
.13
.09
1.080
1.086
1.094
1.103
1.099
47637-8
47637-12
A76153-2
Lemhi
RB 1 979
Gen 1
155
218
261
130
158
218
341
336
191
303
6
6
24
20
17
33
19
34
26
17
32
39
19
22
18
71
64
78
68
52
1
1
2
15
25
28
35
20
17
23
1.1
3.4
2.7
4.2
4.1
-.02
-.01
-.01
.01
.03
.10
.14
.12
.12
.14
1.092
1.098
1.089
1.092
1.087
TXA549-1
LSD, .05
119
285
63
5
22
15
42
18
40
1.4
-.01
.07
1.098
-1-1 Cwt/A x 0.112 = T/ha.
-V Photovolt determination. Color: 1 = white, 6 = dark. Yellowness: higher values indicate more yellowing.
Dulling indicates dulling due to cooking; higher values indicate more dulling.
25
TABLE 10. Yield and Quality, Advanced Late Harvest Trial, Malheur Experiment
Station, 1981
Selection
Yield, Cwt/A1/
Total
No.1
)10 oz.
US no. 1, %
6-10 oz. 4-6 oz.
No.1
Percent
No.2 Culls
Color
Boiled Color?/
Yellow Dulling
Specific
Gravity
A66102-16
A72545-2
A72685-2
A7411-2
A7419-2
214
236
189
214
259
303
317
258
273
323
13
14
18
23
35
32
36
31
37
29
25
24
23
19
16
71
74
73
78
80
7
0
1
7
3
22
25
26
14
16
3.2
4.0
3.5
4.2
2.4
.09
.06
.13
.10
.06
.13
.11
.09
.10
.11
1.107
1.093
1.100
1.101
1.094
A7578-1
A75188-3
AD7267-1
AD7377-1
AD74135-1
174
182
129
140
176
260
237
169
226
275
14
14
34
9
7
27
35
28
26
27
25
27
14
26
30
67
77
76
62
64
6
3
6
4
3
27
19
18
33
33
3.8
1.9
4.5
1.5
2.4
.02
.03
.01
.04
-.003
.16
.08
.17
.05
.17
1.104
1.089
1.075
1.081
1.094
Lemhi
Norchip
R. Burbank
WC521-12
WC672-2
211
189
230
310
223
322
285
316
376
290
12
6
25
39
22
29
30
32
28
33
24
30
16
15
22
65
66
72
82
77
8
14
12
3
2
26
20
15
14
21
4.0
4.1
3.9
2.6
1.8
-.003
.09
.04
.08
.10
.16
.11
.13
.09
.03
1.103
1.088
1.087
1.108
1.098
LSD, .05
57
li Cwt/A x 0.112 = T/ha.
2/ Photovolt determination. Color: 1 = white, 6 = dark. Yellowness: higher values indicate more yellowing.
Dulling indicates dulling due to cooking; higher values indicate more dulling.
26
WILLAMETTE VALLEY TRIAL
Procedure: Twenty-nine varieties or selections were compared at Corvallis in 1981. The crop was grown using conventional production practices. Fertilizer was applied by broadcasting 300 lbs/a of 8-24-8 before
disking and banding 680 lbs/a of 16-16-16 at planting. Seedpieces were
dusted with Dithane fungicide at approximately one pound per 100 pounds of
seed as recommended. Insect and disease pressures were minimal during the
season. However, extremely hot weather during the first two weeks of August
caused severe plant stress and a general reduction in tuber size despite
a weekly sprinkler application of two inches of water. Seed-borne mosaic
viruses were severe for some entries, causing yield losses.
Chipping tests were performed in early March, 1982 after the tubers had
been conditioned for two weeks at 50-60°F preceded by four weeks at 45°F.
Slices were fried 2.5 minutes at 375°F.
Results: U.S. No. 1 yields were lower than normal due to a high percentage of small tubers for most varieties. Extremely hot weather during
the first two weeks of August was largely responsible for yield losses.
Metribuzin at 1 lb ai/a also reduced yields for Bison, Belrus, ND467-3, and
possibly others.
AD7377-1 produced good yields of attractive, oblong, russet-skinned
tubers (Table 11) and appeared to be worth further testing for fresh market; but chips were bitter-tasting and dark (Table 12). A74404-3 likewise
seemed to have tablestock potential but also chipped well. Atlantic
yielded slightly better than Norchip and produced better-flavored, lightercolored chips. Delta Gold outyielded all other entries and chipped as
light as Norchip. It is a yellow-fleshed variety and appears to have good
chipping potential in the Willamette Valley.
27
TABLE 11. Yield, Grade and Quality Characteristics of 29 Potato Varieties
and Selections, Corvallis, 1981
PercenP
No. 1 <4 oz.
Specific
Gravity
Total
Cwt/A
No. 1
A 74404-3
AC 67560-1
AD 7377-1
Allagash
ALR 22-2
503
460
446
371
441
298
201
332
209
205
59.3
43.6
74.4
56.3
57.8
39.6
56.0
23.0
41.8
35.0
1.087
1.072
1.076
1.075
1.079
Atlantic
BC 9071-6
Belrus
Bintje
Bison
Butte
Crystal
Dakchip
Delta Gold
Denali
Lemhi
ND 55-7
ND 258-1
ND 274-6
ND 467-3
ND 8850-2
ND 9474-6A
NDD 110-4
Norchip (Neb.)
Norchip (N. Rus.)
Norchip (Or.)
Norgold
R. Burbank
WC 521-12
357
513
209
524
119
354
413
455
570
422
434
404
392
286
355
384
474
401
389
440
451
341
521
290
233
303
43
253
42
194
234
266
372
271
204
177
246
139
90
165
300
207
147
180
205
163
308
176
65.3
59.2
20.8
48.4
35.4
54.7
56.7
58.3
65.2
64.2
47.0
43.8
62.9
39.2
25.3
43.0
63.3
51.7
37.9
40.9
45.4
48.0
59.2
60.6
32.3
31.7
75.9
48.7
39.3
36.5
36.0
34.6
26.4
19.3
51.0
54.4
33.3
48.3
66.2
54.7
28.9
42.1
58.8
55.9
50.5
43.9
31.4
32.2
108
85
1.087
1.081
1.082
1.083
1.081
1.085
1.074
1.072
1.091
1.094
1.090
1.073
1.077
1.074
1.068
1.073
1.070
1.073
1.083
1.078
1.078
1.076
1.084
1.090
0.004
Entry
LSD., .05
Comments
Oblong light rus.
Red
Smooth oblong rus.
Fair. Rus.
Round-oblong light
rus.
Smooth. Round rus.
Round white. Green.
Large, Green, Yellow
Red. Sencor inj.
Oblong rus.
Round white
Round white. Skinning
Yellow flesh
Round white
Oblong rus.
- Sencor injury.
Typical
Russet norchip?
Typical
Some decay
Long russet
90% virus
1-'Cwt/A x 0.112 = T/ha.
& Tubers tended to be unusually small in 1981 causing poor grades.
28
TABLE 12. Chipping Characteristics of 29 Potato Varieties and
Selections
Entry
Avg.
Color l/
Vas.
Pith
Flavor
Firmness?'
Tuber
Appearance
3!
Sprout4
Length-
N
N
N
N
N-S
1.7
1.7
2.2
2.0
3.5
N
N
N
N
2.3
2.5
2.3
2.5
1.0
2.0
3.0
1.7
2.0
N
N
S
N
N
1.5
2.0
4.0
2.0
2.0
Ok
Bitter
Bitter
Bitter
Bitter
1.0
2.0
2.0
1.7
2.5
N
N
N
N
N
1.3
2.5
2.3
2.0
3.0
7.2
9.7
6.7
7.7
7.7
Ok-Bitter
Bitter
Ok-Bitter
Ok-Bitter
Bitter
2.0
2.5
2.0
2.7
2.2
N
N
N
N
N-S
2.2
2.2
2.0
2.25
3.0
8.3
8.0
7.0
5.7
Ok-Bitter
Ok-Bitter
Ok
Ok
2.3
2.0
1.0
1.0
N-S
N
N
N
2.7
2.5
1.3
2.0
A 74404-3
AC 67560-1
AD 7377-1
Allagash
ALR 22-2
5.7
9.5
9.7
6.5
9.0
4.3
8.0
7.5
5.5
6.0
5.7
9.5
9.7
6.5
9.0
Atlantic
BC 9071-6
Belrus
Bintje
Bison
4.7
8.2
9.3
6.7
3.7
6.7
6.7
5.2
2.0
4.7
Ok
2.5
8.2
Bitter
2.0
9.3
Bitter
1.5
Ok
6.7
Insufficient Sample Size
Butte
Crystal
Dakchip
Delta Gold
Denali
10.0
7.2
8.5
7.2
7.5
8.0
5.5
6.7
5.2
5.5
10.0
7.2
8.5
7.2
7.5
Bitter
Ok-Bitter
Bitter
Ok
Ok
Lemhi
ND 55-7
ND 258-1
ND 274-6
ND 467-3
5.3
10.0
9.3
9.0
10.0
3.3
9.2
7.0
6.0
9.2
5.7
10.0
9.7
9.2
10.0
ND 8850-2
ND 9474-6A
NDD 110-4
Norchip (Neb)
Norchip (Rus.)
7.0
9.7
6.3
7.5
7.5
6.0
6.5
4.3
5.2
6.0
Norchip (Or.)
Norgold
R. Burbank
WC 521-12
7.7
8.0
7.0
5.7
6.7
6.0
5.7
5.0
Ok
Bitter
Bitter
Ok
Bitter
1.3
1.2
1.7
1.7
2.5
1/ Readings based on USDA Color Standards for Chipping Potatoes. Low numbers =
light-colored chips.
1 1 = firm; 3 = soft
2/ N = normal; S = shrivelled
4/
1 = none; 2 = less than 0.5 in.; 3 = 0.5-1.0 in.; 4 = over 1.0 in.