PROJECT
TITLE:
YEAR/PROJECT:
Re~application
o-f
metasuHuron
to
plots
treated
the
year
be-fore
with
varying
rates
o-f
chlorsuHuron
or
metasuHuron
in
combination
with
AC
222,293.
1988/754
PROJECT
PERSONNEL:
Leader
-
Vern
R.
Stewart,
Todd
K.
Keener
-
Research
Specialist.
Northwestern
Agricultural
Reseach
Center,
Kalispell,
MT.
OBJECTIVE:
Evaluation
o-f
re-applications
o-f
metasuHuron
in
spring
barley
-for
crop
tolerance.
SUMMARY:
MetasuHuron
re-applied
to
areas
previously
treated
with
chlorsul-
fiiron
or
metasuHuron
plus
AC
222,293
caused
lower
yields
where
chlorsuHuron
had
been
used,
higher
yields
where
metasuHuron
had
been
used.
There
was
signi-fiicant
yield
reduction
where
these
chemicals
had
been
applied
alone.
RESEARCH
METHODS:
Gal
latin
spring
barley
was
seeded
to
an
area
that
the
previous
year
had
been
treated
with
varying
rates
o-f
chlorsuHuron,
metasuHuron,
and
AC
222,293.
Plots
were
staked
to
assure
proper
re-application
o-f
metasuHuron.
Herbicides
were
applied
post
emergence
using
a
tractor
mounted
research
type
sprayer.
Plots
were
10
feet
by
12
feet
with
treatments
being
replicated
four
times
in
a
randomized
complete
block
design.
A
spray
volume
of
24.85
gpa
was
applied
using
8002
nozzles
at
32
psi.
MetasuHuron
was
applied
at
.125
oz.
ai/A
to
replications
one
and
three.
Bromoxynil
at
.375
lb.
ai/A
was
applied
to
replications
two
and
four
the
same
day.
DicHop-methyl
was
applied
on
the
whole
study
(
.75
lb
ai/A
)
on
May
10.
Difenzoquat
at
1.0
lb
ai/A
was
applied
on
May
25
in
attempts
to
control
a
severe
population
of
wild
oats.
Planting
data:
Crop:
Gallatin
spring
barley
Seedbed
preparation:
Fall
plow
and
disc,
spring
disc
and
cultivate.
Final
seedbed
prepared
with
brill
ion
packer
Previous
crop:
Spring
barley
Planter:
Research
type,
double
disc
openers,
6"
spacing
Seeding
depth:
1
1/2
inches
Seeding
rate:
60
lbs/A
Maintenance
sprays:
Hoelon
and
Avenge
for
wild
oats
(
see
above
)
Surfactant
or
additions:
none
Application
data:
Date:
5/9/88
Air
temp:
62
F
Soil
temp:
65
F
Wind:
0-2mph
Cloud
cover:
clear
Soil
moisture:
Topsoil
-
good
subsoil
-
very
good
Crop
and
weed
growth
stages
at
applications:
Rel.
Hum.
26
Crop:
3-4
leaf
Wild
oats
(
Avena
fatua
)
2-3
leaf
Broadleaves
cotyledon
-
1"
diameter
ftfo
RESULT8I
Table
1
gives
the
results
of
this
study
not
separating
the
reappli-
cation
of
ally
fron
the
no-ally
treatments
but
only
evaluating
the
barley
performance
in
relation
to
last
year's
treatments.
There
were
no
signifi
cant
differences
in
any
of
the
agronomic
measurements.
Tables
2
and
3
give
the
agronomic
data
according
to
Ally
(
«
meta-
sulfuron
)
or
No
Ally.
The
treatments
listed
are
ordered
by
last
year's
treatment
plan
<
1987
).
The
Ally
or
No
Ally
columns
refer
to
the
1988
applications.
Plant
counts
were
lower
in
all
but
three
plot
areas
where
metasulfuron
was
reapplied
this
year.
Height
was
in
most
cases
lower
this
year
where
meta
sulfuron
was
reapplied
except
in
areas
where
there
had
been
1987
metasulfuron
applications.
Metasulfuron
re-applied
to
areas
previously
treated
with
chlorsul-
furon
or
metasulfuron
plus
AC
222,293
resulted
in
lower
yields
where
chlorsul-
'furon
was
used,
higher
yields
idiere
metasulfuron
had
been
used,
and
signif
icant
yield
reduction
where
these
chemicals
had
been
applied
alone
in
1987.
Test
weights
were
reduced
in
the
majority
of
cases
where
metasulfuron
was
reapplied.
No
significant
changes
were
detected
in
the
percent
plump
m
measurements.
Table
1.
Agronomic
data
from
the
re-application
o-f
metasulfuron
(
Ally
)to
plots
treated
the
previous
year
with
varying
rates
of
chlorsulfuron
<
Glean
)
or
metasulfuron
(
Ally
)
in
combination
with
AC
222,293
(
Assert
).
Northwestern
Agricultural
Research
Center,
Kalispell,
Ml,
Date
planted:
April
11,
1988
Harvested:
August
11,
1988
PR
Treatment
Rate
Yield
T.W.
V.
Plump
Pits/
Ht.
lb
or
ai/A
Bu/A
Ib/bu
Ft2
<")
1/
Assert
+
Glean
+
Surf.
.38#+.125oz
70.2
52.0
89.5
59.00
28.88
Assert
+
Glean
+
Surf.
.45#-<-.
125oz
70.0
52.4
91.5
52.25
29.75
Assert
+
Glean
+
Surf.
.SS#-!-.
187oz
78.2
52.5
89.6
54.25
32.13
Assert
+
Glean
+
Surf.
.45#+.187oz
G2.4
52.2
91.0
47.00
29.00
Assert
+
Ally
+
Surf.
.38#+.06oz
67.1
51.7
90.7
47.25
30.25
Assert
+
Ally
+
Surf.
.45#+.06o2
72.6
51.8
89.5
*50.75
29.38
2/
Assert
+
C.O.C
.38#
65.9
52.6
92.4
47.50
29.75
Assert
+
C.O.C
.45#
67.0
52.1
91.2
46.00
30.63
G1
ean
+
Surf.
.
125oz
67.3
52.4
91.6
59.75
31.50
Glean
+
Surf.
.
187o2
73.2
52.8
92.7
48.75
30.63
Ally
+
Surf.
.06oz
51.8
51.5
89.4
50.75
26.50
Check
58.8
52.4
90.7
50.50
28.38
X
67.1
52.2
90.8
51.15
29.7
L.S.D.
19.7
.745
2.60
15.59
3.835
C.V.
10.2
.496
.997
10.60
4.484
P-VALUE
.438
.029
.143
.7430
.2941
1/
Surfactant
used,
R-11
at
.257.
v/v
2/
C.O.C
.
(
crop
oil
concentrate
)
Atplus
41IF
p*i
Table
2.
Agronomic
data
from
the
re-application
of
metasulfuron
(
Ally
)to
plots
treated
the
previous
year
with
varying
rates
of
chlorsulfuron
(
Glean
)
or
metasulfuron
<
Ally
)
in
combination
with
AC
222,293.
Northwestern
Agricultural
Research
Center,
Kalispell,
MT.
Date
planted:
April
11,
1986
Harvested:
August
11,
1986
Treatment
Rate
Plts/FT2
3/
HEIGHT
(")
lb
or
ai/A
Ally
No
Ally
Ally
No
Ally
1/
Assert
+
Glean
+
Surf.
.38#+.125oz
55.00
63.00
29.25
28.50
Assert
+
Glean
+
Surf.
.45#+.125o2
44.50
60.00
26.75
32.75
Assert
+
Glean
+
Surf.
.38#+.18702
53.00
55.50
30.75
33.50
Assert
+
Glean
+
Surf.
.45#+.187o2
34.50
59.50
27.75
30.25
Assert
+
Ally
+
Surf.
.38#+.06o2
43.00
51.50
31.00
29.50
Assert
+
Ally
+
Surf.
,45#+.06o2
54.00
47.50
31.25
27.50
2/
Assert
+
C.O.C
.38#
52.00
43.00
29.50
30.00
Assert
+
C.O.C
.45#
42.50
49.50
28.50
32.75
f-1
Glean
+
Surf.
.125o2
54.50
65.00
29.25
33.75
Glean
+
Surf.
.187oz
37.00
60.50
27.75
33.50
Ally
+
Surf.
.06o2
48.00
53.50
25.00
28.00
f-)
Check
55.50
45.50
27.00
29.75
X
L.S.D.
C.V.
P-VALUE
51.15
22.31
14.91
.4329
29.73
5.061
5-819
.0753
1/
Surfactant
used,
R-11
at
,25%
v/v
2/
C.O.C.
(
crop
oil
concentrate
)
Atplus
41IF
3/
Bromoxynil
applied
as
cover
spray
for
broadleaf
weeds
1*^
Table
3.
Agronomic
data
-from
the
re-application
of
metasulfuron
<
Ally
)to
plots
treated
the
previous
year
with
varying
rates
of
chlorsulfuron
(
Glean
)
or
metasulfuron
<
Ally
lin
combination
with
AC
222,293
(
Assert
).
Northwestern
Agricultural
Research
Center,
Kalispell,
MT.
Date
planted:
April
11,
1988
Harvested:
August
11,
1988
F-1
l*>
r-l
Treatment
Rate
YIELD
BU/A
3/
TEST
NT
LB/BU
%
Plump
lb
or
ai/A
Ally
No
Ally
Ally
No
Ally
Ally
No
Ally
Assert
Glean
.38#+.125oz
65.9
74.4
51.60
52.40
89.25
89.70
+
Surf
1/
Assert
•*-
Glean
.45#+.12502
53.9
86.1
51.75
53.00
90.15
92.80
+
Surf
Assert
•*-
Glean
.38#+.187o2
74.4
82.1
52.00
53.05
87.65
91.45
+
Surf
Assert
+
Glean
.45#+.187oz
45.3
79.5
51.70
52.70
92.15
89.75
+
Surf
Assert
+
Ally
.38#+.06oz
69.6
64.6
51.30
52.15
90.20
91.10
+
Surf
Assert
+
Ally
.45#+.06oz
74.4
70.9
51.45
52.10
89.85
89.15
+
Surf
2/
'
Assert
+
C.O.C
.38#
53.9
78.0
52.50
52.70
93.25
91.60
Assert
+
C.O.C
.45#
53.2
80.9
51.25
52.95
90.30
92.00
Glean
+
Surf.
.1250Z
54.6
80.1
51.80
52.95
90.80
92.40
Glean
+
Surf.
.1870Z
58.4
88.0
52.70
52.90
93.35
92.00
Ally
Surf.
.06oz
38.4
65.3
51.50
51.45
9.0.00
88.85
Check
36.6
81.0
52.05
52.70
90.65
90.75
X
67.
05
52.19
90
>.80
L.S.D.
30.
17
1.
180
3.
641
C.V.
15.
38
.7726
1.
371
P-VALUE
.0439
.0269
.2288
1/
Surfactant
used,
R-11
at
,25V,
v/v
2/
C.O.C.
(
crop
oil
concentrate
)
Atplus
41IF
3/
Bromoxynil
applied
as
cover
spray
for
broadleaf
weeds
