PROJECT
TITLE:
Combination
wild
oat
and
broadlea-f
herbicide
etudy
on
spring
wheat.
"
YEAR/PROJECT:
1988/754
PROJECT
PERSONNEL:
Leader
-
Vern
R.
Stewart,
Todd
K.
Keener
-
Research
^
Specialist.
Northwestern
Agricultural
Reseach
Center,
Kalispell,
NT.
OBJECTIVES:
To
evaluate
the
combination
o-f
broadleaf
herbicides
and
wild
oat
herb-
cides
in
combination
as
tank
mixes.
To
deterimine
the
efficacy
of
the
interaction
of
these
herbicides
when
applied
in
combination.
SUNNARV:
n
Harmony
Extra
and
Express
combined
with
PP
604,
Assert,
Tiller,
Puma,
and
Hoelon
all
showed
potential
in
providing
broadspectrum
weed
control
in
Newana
spring
wheat.
"
RESEARCH
NETHODS:
Herbicides
were
applied
post
emergence
using
a
tractor
mounted
research
type
sprayer.
Plots
were
located
in
12
foot
drill
strips
and
were
10
feet
wide
^
with
treatments
being
applied
across
the
12
foot
strips.
Treatments
were
rep
licated
four
times
in
a
randomized
complete
block.
A
spray
volume
of
24.85
gpa
was
applied
using
8002
nozzles
at
32
psi.
All
treatments
were
applied
the
same
n
day.
Planting
data:
Crop:
Newana
spring
wheat
Seedbed
preparation:
Fall
plow
and
disc,
spring
disc
and
cultivated,
seedbed
completed
with
brillion
packer
Previous
crop:
Spring
barley
Planter:
Press
type
drill,
7
inch
spacing
Seeding
depth:
1
1/2
inches
Seeding
rate:
60
lbs/A
Maintenance
sprays:
none
Surfactant
or
additions:
See
treatment
plan
Application
data:
Date:
5/23/88
Air
temp:
60
F
Soil
temp:
62
F
Rel.
Hum.
30
7.
Wind:
2-5
mph
Cloud
cover:
partly
cloudy
Soil
moisture:
Topsoil
-
good
subsoil
-
very
good
Crop
and
weed
stages
at
applications:
Crop:
5
leaf,
tillering
Wild
oats
<
Avena
fatua
>
3-4
leaf
Henbit
(
Lamium
amp1exicauli
)
4
leaves
Lambsquarter
(
Chenopodium
album
)
8
leaves
Catchfly
(
Silene
noctiflora
)
2-4
leaves
Wild
buckwheat
(
Polygonum
convolvulus
)
2
leaves
Fanweed
(
Thlaspi
arvense
>
8-12
leaves
RESULTS!
There
was
a
high
population
of
wild
oat
and
broadleaf
weeds
through
out
the
study.
Where
just
broadleaf
herbicides
were
applied
the
wild
oat
popula-
tion
greatly
restricted
yields
and
lowered
test
weights.
Wild
oat
herbicides
applied
alone
controlled
the
wild
oats
fairly
well,
therefore
yields
were
good
in
comparison
to
the
check.
Harmony
Extra
and
Express
combined
with
Assert,
Tiller,
Puma,
and
Hoelon
provide
excellent
broad
spectrum
weed
control.
Those
broadleaf
herbicides
combined
with
PR
604
however,
did
not
effectively
control
wild
oats,
therefore
yields
and
test
weights
were
reduced
significantly.
r*i
f¥C
Table
1.
Agronomic
data
-from
the
Combination
Herbicide
Study
conducted
on
the
Northwestern
Agricultural
Research
Center
in
Kali
spell,
MT
in
1988.
(
Harmony
Extra
&
Express
+
Wild
Oat
Herbicides
)
Planted:
April
11,
1988
Harvested:
Augiust
23,
1988
Treatment
Yield
Bu/A
T.W.
Ib/Bu
X
W
Oat
Control
p-1
Harmony
Extra
+
Surf<.
25%)
20.5
57.8b
.0000
Harmony
Extra
+
Surf(
2%
)
+
PP
604
41.7a
59.9
47.50
Harmony
Extra
+
Surf(.
25%)
+
Assert
64.7a
60.8a
97.25
Harmony
Extra
+
Surf(.
25%)
+
Tiller
61.9a
61.0a
85.00
Harmony
Extra
+
Surf(.
25%)
+
Puma
57.4a
60.9a
81.25
Harmony
Extra
+
Surf(.
25%)
Hoelon
52.4a
61.0a
85.00
nn
Harmony
Extra
+
Surf(.
25%)
19.3
58.3
.0000
Harmony
Extra
+
Surf(
2%
)
+
PP
604
25.4
59.7
8.750
Harmony
Extra
+
Surf(.
25%)
+
Assert
52.5a
60.5a
97.00
Harmony
Extra
+
Surf<.
25%)
+
Tiller
47.2a
60.3a
62.50
Harmony
Extra
+
Surf(.
25%)
+
Puma
39.8a
60.4a
73.75
Harmony
Extra
+
Surf(.
25%)
-t-
Hoelon
46.4a
60.9a
75.00
Express
+
Surf(.25%)
13.9
56.6b
.0000
Express
+
SurfC
2%
)
+
PP
604
23.0
58.9
6.250
Express
+
Surf(.25%)
+
Assert
61.0a
60.9a
90.50
Express
+
Surf(.25%)
+
Tiller
51.2a
60.8a
81.75
Express
+
Surf(.25%)
+
Puma
43.4a
60.6a
72.50
Express
+
Surf(.25%)
+
Hoelon
54.8a
60.8a
83.75
Express
+
Surf(.25%)
22.9
57.3b
.0000
Express
+
Surf(
2%
)
+
PP
604
30.3
59.6
20.00
i-n
Express
+
Surf(.25%)
+
Assert
52.4a
60.5a
91.75
Express
+
Surf(.25%)
+
Tiller
41.3a
59.7
i45.00
Express
+
Surf(.25%)
+
Puma
40.8a
60.6a
62.50
Express
+
Surf(.25%)
+
Hoelon
40.8a
60.6a
63.75
PP
604
+
2%
COC
41.6a
60.5a
60.00
Assert
+
Surf
*
53.1a
60.8a
92.75
Tiller
51.7a
60.7a
70.00
Puma
42.3a
60.7a
58.75
Hoieon
46.7a
60.8a
80.50
Check
22.7
59.0
.0000
X
41.8
60.0
56.48
(VI
L.S.D.
11.5
.900
18.09
)
1
C.V.
9.73
.
53o
11.36
P-VALUE
.000
.000
.0000
Sur-factant
with
Assert
R-11,
label
rate(.25X
v/v
/gal
over
10
gpa
solution)
Surfactant
with
Dupont
cmpds
.25%
v/v,
R-11
also
C.O.C.
provided
with
PP
604,
Atplus
411,
2
%
v/v.
1/
LQ^Lambsquarter
(Chenopodium
album),
NFCsNight
flowering
catchfly
(Silene
noctiflora),
FW=Fanweed
(Thlaspi
arvense),
H6~Henbit
(Lamium
amplexicauli)
Table
2.
fi
roadlea-f
Weed
Control
data
-from
the
Combination
Herbicide
Study
conducted
on
the
Northwestern
Agricultural
Research
Center
in
Kalispell,
MT
in
1988.
(
Harmony
Extra
&
Express
Wild
Oat
Herbicides
)
Planted!
April
11,
1988
Harvested:
Augiust
23,
1988
Treatment
%
Broadlea-f
Weed
Control/I
LQ
NFC
FW
HB
r-»
Harmony
Extra
+
Surf
(
.257.)
100.0 100.0
100.0
100.0
Harmony
Extra
+
Surf
<
27.
)
+
PP
604
100.0
100.0
100.0
99.50
Harmony
Extra
+
Surf
(
.257.)
+
Assert
100.0
100.0
100.0
100.0
Harmony
Extra
+
Surf
(
.257.)
+
Tiller
100.0
100.0
100.0
96.25
Harmony
Extra
+
Surf
(
.257.)
+
Puma
100.0
100.0
100.0
99.50
Harmony
Extra
+
Surf
(
.257.)
+
Hoelon
100.0
100.0
100.0
98.00
Harmony
Extra
+
Surf
(
.257.)
100.0 100.0
100.0
99.50
Harmony
Extra
+
Surf
(
27.
)
+
PP
604
100.0 100.0
100.0
100.0
Harmony
Extra
+
Surf
(
.257.)
+
Assert
100.0
100.0
100.0
98.50
Harmony
Extra
+
Surf
(
.257.)
+
Tiller
100.0
100.0
100.0
99.75
Harmony
Extra
+
Surf
(
.257.)
+
Puma
100.0
100.0
100.0
98.75
Harmony
Extra
+
Surf
(
.257.)
+
Hoelon
100.0 100.0
100.0
100.0
Express
+
Surf(.
257.)
100.0
100.0
100.0
100.0
Express
+
Surf<
27.
)
+
PP
604
98.75
100.0
100.0
97.50
Express
+
Surf(.
257.)
+
Assert
95.00
98.75
100.0
95.00
Express
+
Surf(.
257.)
+
Tiller
100.0
97.50
100.0
93.75
Express
+
Surf(.
257.)
+
Puma
100.0
100.0
100.0
97.25
Express
+
Surf(.
257.)
+
Hoelon
98.75
100.0
100.0
94.75
Express
+
Surf{.
257.)
100.0
100.0
100.0
100.0
Express
+
Surf(
27.
)
+
PP
604
100.0
100.0
100.0
100.0
Express
+
Surf(.
257.)
+
Assert
100-0
100.0
.100.0
98.50
Express
+
Surf(.
257.)
+
Tiller
100.0
100.0
100.0
99.75
Express
+
Surf(.
257.)
+
Puma
100.0 100.0
100.0
100.0
Express
+
Surf(.
257.)
+
Hoelon
100.0
100.0
100.0
100.0
PP
604
+
27.
COC
93.75
83.75
98.75
73.75
Assert
+
Surf
«
86.25
87.50
96.25
78.75
Tiller
100.0 100.0
100.0
80.00
Puma
61.25
75.00
70.00
55.00
Hoieon
63.75
65.00
62.50
43.75
Check
.0000 .0000
.0000
.0000
X
94.87
95.21
95.88
91.42
L.S.D.
22.54
23.50
22.70
21.37
C.V.
8.441
8.773
8.414
8.304
P-VALUE
.0005
.0063
.0018
.0000
Sur-factant
with
Assert
R-11,
label
rate<.25^
v/v
/gal
over
10
gpa
solution)
Surfactant
with
Dupont
cmpds
.257.
v/v,
R-11
also
C.O.C.
provided
with
PP
604,
Atplus
411,
2
V.
v/v.
1/
LQ-Lambsquarter
(Chenopodium
album),
NFC^^Night
flowering
catchfly
(Silene
noctiflora),
FW==Fanweed
(Thlaspi
arvense),
HB»Henbit
(Lamium
amplexicauli)
