^S'S'
(-t
PROJECT
TITLEt
SuHonyl
urea
herbicide
evaluation
in
Minter
wheat.
YEAR/PROJECTj
1988/754
PROJECT
PERSONNEL:
Leader
-
Vern
R.
Stewart,
Todd
K.
Keener
-
Research
Specialist.
Northwestern
Agricultural
Reseach
Center,
Kalispell,
MT.
SUMMARY:
Three
suHonyl
urea
herbicides
were
tested
in
Winridge
winter
wheat
No
significant
differences
in
yield,
test
weights,
and
height
were
found.
Tansey
mustard,
henbit,
conical
catchfly,
and
fanweed
were
all
effectively
controlled
with
the
herbicides
evaluated.
"
RESEARCH
METHODS:
Herbicides
were
applied
post
emergence
using
a
tractor
mounted
research
type
sprayer.
Plots
were
10
feet
by
20
feet
with
treatments
being
replicated
four
times
in
a
randomized
complete
block.
This
trial
was
established
in
a
solid
seeded
field.
A
spray
volume
of
24.85
gpa
was
applied
using
8002
nozzles
at
32
psi.
"
Planting
data:
Crop:
Winridge
Seedbed
preparation:
Fall
plow
and
disc,
spring
disc
and
cultivated.
Previous
crop:
Fallow
Type
planting:
Press
type
drill
Seeding
depth:
1
1/2
inches
Seeding
rate:
80
lbs/A
Maintenance
sprays:
none
Surfactant
or
additions:
R-11
at
.257.
v/v
where
indicated
Application
data:
Date:
3/22/87
Air
temp:
48
F
Soil
temp:
45
F
Rel.
Hum.
29%
Wind:
0
Cloud
cover:
prtly
cldy
Soil
moisture:
Topsoil
-
good
subsoil
-
good
Crop
and
weed
stages
at
applications:
Wheat:
2-3
leaf,
tillering
Fanweed
(
Thlaspi
arvense
)
6-10
leaves,
1-2"
dia.
Henbit
(
Lamium
amplexicauli
10-15
leaves,
1-2"
dia.
Conical
catchfly
(
Silene
conoidea
)
6-8
leaves
1
1/2"
dia.
Tansey
mustard
(
Descurainia
pinnata
)
8-12
leaves
RESULTS:
Broadleaf
weed
control
was
excellent
for
all
sulfonyl
urea
treatments.
The
bromoxynil
+
MCPA
tratment
was
weak
on
henbit
and
gave
only
88%
control
of
the
Silene
species.
The
height,
yield
and
test
weight
data
demonstrates
the
crop
safety
of
these
compounds
on
winter
wheat.
Yield,
test
weight
and
height
differences
were
not
significant.
/rf
Table
1.
Agronomic
data
-from
the
suHonyl
urea
herbicide
study
on
winter
wheat
con
ducted
on
the
John
Alton
•farm,
Kalispelly
MI.
in
1988.
Date
planted!
September
20,
1987
Date
harvested:
July
27,
1988
Treatment
Rate
AI/A
Percent
Broadlea-f
Control
1/
5/10/88
—
6/10/88
-
TM
HB
Silene
FW
TM
Silene
Harmony
Surf
.125
oz
100.0
86.67
100.0 100.0
98.33
98.33
n
Harmony
+
Surf
.25
oz
100.0
94.33
100.0
100.0
96.67
98.33
Harmony
+
Surf
•375
oz
100.0
96.33
100.0
100.0
100.0
100.0
Harmony
Extra
.25
oz
98.33
97.33
100.0
100.0
100.0
100.0
Surf
Harmony
Extra
+
.375
oz
98.33
100.0
100.0
100.0
100.0
100.0
n
Surf
Express
Surf
.125
oz
99.67
99.67
100.0
100.0
100.0 100.0
1
Express
+
Surf
.25
oz
100.0
100.0
100.0
100.0
100.0
100.0
Ally
+
Surf
.06
oz
99.67
100.0
100.0
100.0
100.0
100.0
Bromox
+MCPA
.375
lb
100.0
58.33
88.33
100.0
93.00
98.33
rn
Check
.0000
.0000
.0000
.0000
.0000
.0000
X
89.60
83.27
88.83
90.00
68.80
89.50
L.S.D.
2.111
10.53
6.826
.0000
7.209
2.859
C.V.
.7930
4.258
2.586
.0000
2.732
1.075
P-VALUE
.0000
.0000
.0000
.0000 .0000
.0000
Plots
10'
X
20',
3
reps.
Surfactant
.25%
v/v
of
R-11
1/
TM
=
Tansey
mustard
(Descurainia
pinnata)
HB
=
Henbit
(Lamium
amplexicauli)
SILENE
B
Cone
catchfly
(
Silene
conoidea
)
FW
=
Fanweed
(Thlaspi
arvense)
Harmony
=
DPX-M6316
Express
«
DPX-L5300
Ally
=
DPX-T6376
Harmony
Extra
=
DPX-R9674
Table
2.
Agronomic
data
-from
the
suHonyl
urea
herbicide
study
in
winter
wheat
conducted
on
the
John
Alton
farm,
Kalispell,
MT.
in
1988.
Date
planted:
September
20,
1987
Date
harvested:
July
27,
1988
Treatment
Form
Rate
AI/A
Arat/
Plots
Height
(")
Yield
Bu/A
Test
Wt
Ib/Bu
Harmony
+
Sur-f
757.
.125
oz
.087
45.16
65.77
61.37
Harmony
+
Sur-f
757.
.25
oz
.174
44.88
60.46
60.37
Harmony
+
Surf
757.
.375
oz
.260
44.61
64.25
61.30
Harmony
Extra
+
757.
.25
oz
.174
46.47
70.65
61.63
Surf
Harmony
Extra
+
757.
.375
oz
.260
45.39
67.55
61.43
Surf
Express
+
Surf
757.
.125
oz
.087
45.55
67.88
61.40
Express
+
Surf
757.
.25
oz
.174
43.43
65.27
60.70
Ally
+
Surf
607.
.06
oz
.052
44.61
68.18
61.50
Bromox
■♦■MCPA
4
lb
.375
lb
6.5
ml
46.18
57.19
61.00
Check
41.73
56.79
62.60
Plots
10'
X
20',
3
Surfactant
.25%
v/v
reps,
of
R-11
X
L.S.D.
C.V.
P-VALUE
44.80
2.645
1.987
.0516
64.42
11.85
6.195
.2474
61.33
1.358
.7455
.1590