PROJECT
TITLES
Evaluation
o-f
Harmony
Extra
and
Express
for
crop
tolerance
in
two
varieties
of
spring
barley.
YEAR/PROJECT
1988/754
PROJECT
PERSONNEL:
Leader
-
Vern
R.
Stewart,
Todd
Keener
-
Research
Specialist,
Northwestern
Agricultural
Research
Center,
Kalispell,
MT
OBJECTIVES
To
evaluate
the
tolerance
of
two
spring
barley
varieties
to
various
rates
of
Harmony
Extra
and
Express.
SUMMARY:
No
injury
was
observed
on
the
two
spring
barley
varieties
tested
for
tol
erance
to
Harmony
Extra
or
Express.
There
were
no
agronomic
differences
measured
due
to
treatments
in
barley
varieties
evaluated.
RESEARCH
METHODS:
Herbicides
were
applied
post-emergence
to
two
varieties
of
spring
barley
using
a
tractor
mounted
research-type
sprayer.
Plots
were
8.5
feet
by
15
feet
with
treatments
across
varieties
being
replicated
four
times
in
a
complete
ran
domized
block
design.
A
spray
volume
of
24.85
gpa
was
applied
using
8002
nozzles
at
32
psi.
Planting
date:
Crop:
Hector
and
Gallatin
spring
barley
Seedbed
preparation:
Fall
plow
and
disc,
spring
disc
and
cultivate
Seedbed
prepared
with
a
brill
ion
packer
Previous
crop:
Spring
barley
Soil
type:
Creston
silt
loam
Type
planting:
Research
plot
seeder,
double
disc
openers,
6"
spacing
Seeding
depth:
1
1/2
inches.
Seeding
rates
60
lbs/A
Maintenance
sprays:
none
R-11
surfactant
used
where
indicated,
.25
%
v/v
"
Application
data:
Date:
5/25/88
Air
temps
44
F
Soil
temps
50
F
R.H.
42%
Cloud
covers
cloudy,
foggy
(plants
wet
at
application).
Winds
0-2
Soils
topsoil
moist,
sub
soil,
very
good
moisture
Crop
and
weed
stages
at
applications
Barley;
5-7
leaf,
pre-tiller
Fanweed
(
Thlaspi
arvense
)
4-8
leaves
Tansey
mustard
(
Descurainia
pinnata
)
4
leaves
Henbit
<
Lamium
amplexicauli
)
4
leaves
Pigweed
(
Amaranthus
retroflexus
)
2-4
leaves
RESULTS:
Injury
ratings
taken
on
a
0-10
scale
were
not
above
.25
indicating
good
crop
tolerance
of
all
rates
tested
on
both
spring
barley
varieties.
Weed
con-
"
trol
taken
prior
to
weeding
was
excel1ant
for
all
treatments
tested
(
weed
free
area
desired
for
crop
tolerance
testing
)
Table
1.
Yields
varied
from
73.3
to
94.1
bu/A
with
no
significance
found
between
any
of
the
treatments.
Test
„
weights
averaged
52.3
and
51.0
Ibs/bu
respectively
for
Gallatin
and
Hector.
The
percent
plump
mean
was
90.3'/
for
Gallatin
and
7B,AV.
for
Hector.
Height
(tteasurements
are
given
in
table
2.
No
significant
differences were
reported
in
yield,
test
weight,
7,
plump,
and
height.
Table
1.
Agronomic
data
from
evaluations
of
Harmony
Extra
and
Express
on
two
varieties
of
spring
barley
grown
on
the
Northwestern
Agricultural
Research
Center,
Kalispell,
tit.
in
1988.
Planted:
May
2,
1988
Harvested:
August
12,
1988
Field
F-3
Treatment
Rate
Injury
1/
oz
ai/A
Klages
Gallatin
X
Weed
Control
2/
Fanweed
Pigweed
Harmony
Extra
+
Surf
.375
.0000
.0000
100.0 100.0
<.25X
v/v)
Harmony
Extra
+
Surf
.75
.2500
.1250
100.0
100.0
(.257.
v/v)
Harmony
Extra
+
2,4-D
.375
+4
.0000
.0000
100.0
100.0
Harmony
Extra
+
2,4-D
.375
+8
.0000
.0000
100.0
100.0
fH
Harmony
Extra
+
2,4-D
.75+4
.0000
.0000
100.0
100.0
Harmony
Extra
+
2,4-D
.75+8
.1250
.0000
100.0 100.0
Express
+
Surf.
(.257.)
.125
.0000
.2500
100.0
100.0
Express
+
Surf.
(.257.
.25
.0000
.0000
100.0
100.0
Express
+
2,4-D
.125
+4
.1250
.0000
100.0.
100.0
r-1
Express
+
2,4-D
.125
+8
.2500
.2500
100.0
100.0
Express
+
2,4-D
.25
+
4
.1250
.0000
100.0
100.0
1—1
Express
+
2,4-D
.25
+
8
.0000
.1250
100.0 100.0
2,4-D
4
.0000
.0000
100.0
100.0
n
2,4-D
8
.2500
.1250
100.0 100.0
n
Check
.0000
.0000
.0000
.0000
X
.0583
.0750
93.33
93.33
n
L.S.D.
.2941
.3458
.0000
.0000
C.V.
176.6
161.6
.0000
.0000
1/
Injury
Rating
on
O-IO
scale,
0=no
injury
lO^dead
plants
due
to
chemicc
2/
Weed
Control
Fanweed
(Thlaspi
arvense)
Pigweed
(Amarathus
rectroflexus)
(—1
Table
2.
Agronomic
data
-from
the
Harmony
Extra
/
Express
Crop
Tolerance
Study
grown
on
the
Northwestern
Agricultural
Research
Center,
Kalispell,
MT.,
in
1988.
Barley
varieties
tested:
Gallatin
(
Gal
)
and
Klages
(
Klg
).
Field
F~3
Treatment
Rate
YIELD
TEST
WT.
%
PLUHP
HEIGHT
(IN)
oz
ai/A
Gal
Klg
Gal
Klg
Gal
Klg
Gal
Klg
n
Harmony
Extra
+
Sur-f
.375
78.7
70.7
52.1
50.8
88.8
75.9
24.9
25.5
(.25'/.
v/v)
Harmony
Extra
+
Sur-f
.75
80.1
75.6
51.9
51.0
87.5
75.1
25.8
25.3
(.25'/.
v/v)
Harmony
Extra
+
2,4-D
.375
+4
87.1
74.4
52.2
51.2
91.8
80.3
25.3
25.0
n
Harmony
Extra
+
2,4-D
.375
+8
86.2
76.2
52.2
53.0
92.1
76.6
25.6
25.1
Harmony
Extra
+
2,4-D
.75
+
4
86.8
77.6
52.4
51.1
91.0
77.2
24.5
25.9
n
Harmony
Extra
+
2,4-D
.75
+
8
79.1
76.8
52.0
51.0
88.5
77.6
24.2
25.0
Express
+
Sur-f.
(.25"/.)
.125
94.1
80.4
52.6
51.5
91.8
79.9
25.3
25.4
i-n
Express
+
Surf.
(.257.)
.25
83.3
74.8
52.2
51.0
89.1
77.5
24.9
25.2
r-i
Express
+
2,4-D
.125
+4
93.8
87.6
53.0
51.5
92.1
82.0
25.7
26.5
Express
+
2,4-D
.125
+8
82.5
73.2
52.2
51.3
90.3
80.7
24.3
24.8
n
Express
+
2,4-D
.25
+
4
85.0
81.1
52.5
50.7
90.3
78.9 26.0
26.3
Express
+
2,4-D
.25
+
8
73.3
68.9
51.8
50.8
89.1
75.0
24.2
25.1
2,4-D
4
78.6
77.8
51.9
50.9
90.7
81.2
24.2
24.8
o
2,4-D
8
89.6
80.7
52.4
51.2
90.0
78.6
25.6
26.5
Check
92.8
74.9
52.4
50.9
90.9
79.9
24.2
25.7
X
84.4
76.8
52.3
51.0
90.3
78.4
25.0
25.5
c.v.
6.60
6.92
.553
.488
1.23
2.67
2.90
2.96
P-Value
.287
.730
.306
.560
.105
.356
.632
.873
L.S.D.
15.9
15.2
.824
.712
3.17
5.96
5.25
5.47
