O 5:e on
University y
AGRONOMIC CROP SCIENCE REPORT
Extension
Research
STEPHENS WHEAT
Norman Goetze
Extension Agronomist
Oregon State University
The Oregon Agricultural Experiment Station on March 9, 1977, released this new, highyielding, semi-dwarf, soft white wheat in cooperation with the Agricultural Experiment
It was developed from a cross between Nord Desprez
Station of Idaho and Washington.
and Pullman Selection 101. Liberal quantities of Foundation Seed are in production
and will be allocated for seed increase plantings in fall 1977.
Stephens is a high-yielding, semi-dwarf, awned, soft white cultivar which seems to have
Its
a wide range of adaptation to the winter wheat regions of the Pacific Northwest.
performance
is
in
the
Willamette
release is for state-wide adaptation; but its best
Valley, the driest of the summer-fallow regions, and some of the irrigated regions in
Its soft white milling and baking qualities are generally better
"Oregon (see table).
than other commercial cultivars. Both its milling score and cookie diameter are particularly high.
Stephens has better resistance to stripe rust (including the Skagit Valley race)
any commercial variety with the exception of Luke. It is resistant to leaf rust
It is moderately resistant to mildew and moderately susceptible to
common bunt.
It is less susceptible to yield losses from cerosporella than other soft
toria.
Stephens is susceptible to dwarf bunt, flag smut, and snow mold.
cultivars.
than
and
sepwhite
Stephens was developed by Oregon Agricultural Experiment Station workers.
Yield of winter wheat cultivars at various lower-yielding eastern Oregon locations.
Rew
Pilot
Condon]J Average
Heppner
Arlington
Farm
Rock
Moro
(bushels per acre)
Stephens 1/
McDermid
Hyslop
45.2
39.3
40.7
32.5
34.3
32.8
Faro
Luke
Nugaines
42.7
38.8
41.5
30.8
30.1
27.4
31.1
39.8
29.4
38.6
Paha
30.3
34.2
Wanser
1/ Tested in 1975 and 1976 only.
Rew
EXT/ACS 31
7/77
29.3
30.4
29.3
27.1
30.4
30.2
29.3
29.0
23.8
32.6
32.1
31.0
30.2
29.0
29.4
30.2
27.4
28.2
27.9
24.3
27.4
25.2
30.9
30.6
30.2
29.5
27.4
27.5
27.6
28.2
26.9
27.6
26.0
20.7
21.9
25.5
29.3
28.8
28.6
32.2
29.4
29.5
29.8
29.8
28.1
2
SOME AGRONOMIC DATA FOR STEPHENS
IN COMPARISON TO HYSLOP, McDERMID, NUGAINES, AND DAWS
WHEN GROWN AT CORVALLIS, PENDLETON, AND ONTARIO, OREGON
Stephens
Hyslop
McDermid
Nugaines
Daws
Heading Date
(days from planting)
Corvallis
Pendleton
Ontario
152
160
223
151
161
224
147
157
221
45
36
37
45
37
37
47
35
38
39
35
47
5
35
0
0
15
0
0
0
0
61
61.1
61.2
61.3
60.8
59.8
60.5
61.1
60.1
58.1
58.9
59.0
62.1
59.1
148
157
221
150
159
Plant Height
(inches)
Corvallis
Pendleton
Ontario
36
35
Locing_
(percent)
Corvallis
Pendleton
Ontario
0
0
2
0
0
Test Weight
(pounds per bushel)
Corvallis
Pendleton
Ontario
3
YIELD OF WINTER WHEAT CULTIVARS
AT VARIOUS HIGHER YIELDING EASTERN OREGON LOCATIONS
Non-irrigated
Variety
Pendleton
Weston
LaGrande 1/
Enterprise
Average
(bushels per acre)
76.7
76.9
Stephens 2/
McDermid
Hyslop
Luke
Faro
Nugaines
Paha
77.1
74.1
75.1
75.5
68.0
72.3
60.8
62.8
66.7
66.3
60.5
63.4
73.3
75.4
74.4
73.3
72.1
72.6
66.0
70.6
60.0
62.7
59.7
69.0
68.5
68.3
59.1
67.0
66.4
54.7
56.9
54.8
63.0
Irrigated
Variety
Pendleton
Summerville
Average
(bushels per acre)
Hyslop
Nugaines
McDermid
Stephens 2/
Luke
Paha
99.1
93.0
94.0
97.4
89.0
66.2
87.8
87.0
81.0
73.9
74.1
72.9
1/ No test in 1976
2/ Tested in 1975 and 1976 only
93.4
90.0
87.5
85.6
81.6
69.6
4
YIELD OF WINTER WHEAT CULTIVARS
AT VARIOUS OREGON EXPERIMENT STATIONS
Stephens
Hyslop
McDermid
Nugaines
Luke
Daws
Paha
Faro
Moro
----
107.0
125.6
110.5
114.4
88.4
89.5
86.9
88.3
92.7
81.5
63.7
79.3
81.6
51.4
66.6
66.5
41.0
48.9
51.4
47.1
46.3
48.6
51.3
48.7
38.0
47.7
48.5
44.7
43.4
58.5
50.8
50.9
30.9
33.3
44.8
36.3
93.6
81.4
66.5
81.4
79.9
81.8
48.4
70.0
84.2
90.0
67.2
80.5
68.8
72.4
51.8
64.3
(bushels per acre)
Corvallis
1974
1975
1976
Average
110.8
136.5
133.4
126.9
119.3
104.4
119.4
114.4
92.8
108.5
111.3
104.2
86.4
92.5
Moro
1974
1975
1976
Average
48.6
64.7
50.5
54.6
43.7
38.1
43.7
57.1
48.6
49.8
44.6
51.3
44.7
57.1
53.8
51.5
Pendleton
1974
1975
1976
Average
87.8
88.2
68.2
81.4
91.4
90.5
67.6
83.2
98.7
84.4
67.5
83.5
92.8
84.2
69.0
82.0
95.6
85.1
Average
114.7
129.2
103.2
115.7
107.6
127.9
113.9
116.5
111.7
129.0
87.2
112.3
103.9
116.6
105.5
102.5
107.8
108.3
95.3
103.8
Ontario
1974
1975
1976
Average
134.6
141.4
155.4
143.8
137.9
138.4
147.8
141.4
146.2
149.2
161.9
152.4
131.0
129.5
Madras
1974
1975
1976
78.9
85.9
143.1
134.5
--
66.3
82.3
-
----
--
83.4
105.9
77.5
88.9