2007 Sucker Control Trials
• Regional Growth Regulator Trials
• MH-Free Sucker Control Trials
• MH-Free Nozzle Study
Sucker Control Trials
•
The Regional Sucker Control Trials are conducted under the
auspices of the Regional Growth Regulator Committee of the
Tobacco Worker’s Conference. Treatments proposed by the
committee were treatments 1-7. Treatment 8 was added for this
study only. A sprayer malfunction on treatment 2 produced
results that were not characteristic of the past performance of this
treatment. Treatments 3 (MH at 1.5 gal/a), 4 (Royal MH-30 at 1.5
gal/a + Flupro at 0.5 gal/a), & 5 (Royal MH-30 at 1.5 gal/a + Butralin
at 0.5 gal/a) were all excellent treatments. Both the Off-shoot T
followed by Off-shoot T + Butralin at 0.5 gal/a & Off-shoot T
followed by Off-shoot T + Butralin at 1 gal/a were acceptable, but
not as clean as treatments 3-5. Butralin at 1 gal/a by itself was as
good as when Off-shoot T was added. All Treatments were made
with a West Texas Lee high clearance sprayer using a three nozzle
arrangement in a TG-3 – TG-5 – TG-3 configuration and an
application volume of 60 gal/a. Applicator speed was 2.4 mph at
30 psi. Plots were 55 ft by 2 rows (42” rows) in a randomized
complete block design with four replications.
Regional Sucker Control
Treatments*
1st Treatment (Elongated Bud)
2nd Treatment (At topping – 10-25% bloom)
1
Untreated Check
2
Royal MH-30 (2 gal/a)
3
Royal MH-30 (1.5 gal/a)
4
Royal MH-30 (1.5 gal/a + Flupro 0.5 gal/a)
5
Royal MH-30 (1.5 gal/a + Butralin 0.5 gal/a)
6 Off-shoot T (3%)
Off-shoot T (4%) + Butralin (0.5 gal/a)
7
Butralin (1 gal/a)
8 Off-shoot T (3%)
Off-shoot T (4%) +Butralin (1 gal/a)
* 60 gal/a at 2.4 mph and 30 psi using a West Texas Lee high clearance sprayer
Treatments were scheduled for 5 days apart but were applied 7 days apart due to weather
Comparison of Sucker Control
Treatments at Two Weeks after Application
UK Spindletop Farm
96.25
100
100
91.25
81.25
77.5
80
60
60
45
%
40
32
20
0
0
C
UT
M
*
H2
M
.5
1
H
M
.5
F
.5
1
H
M
.5
B
.5
H1
O
bO
f
3
.5
4B
B1
O
bO
3f
1
4B
D
LS
(MH= Royal MH-30, F=Flupro, B=Butralin,) in (gal) O=Off-Shoot-T in (%),
UTC=untreated check, fb=followed by at 7 days. *=Sprayer malfunctioned
The Effects of Sucker Treatment
on Sucker Number per Plant
UK Spindletop Farm
Suckers/Plant
10
8
6.875
6
3.425
4
2.1
2
0.4
0.35
1.94
0.675
0.3
0.675
0
C
UT
*
H2
M
5
M
.
H1
M
H1
.5
F
.5
5
5
M
B.
5
.
H1
3f
.
4B
bO
B1
bO
f
3
1
4B
D
LS
O
O
(MH= Royal MH-30, F=Flupro, B=Butralin,) in (gal) O=Off-Shoot-T in (%),
UTC=untreated check fb=followed by at 7 days. *=Sprayer malfunctioned
The Effects of Sucker Treatment
on Sucker Weight
UK Spindletop Farm
600
500
400
(g)
300
200
100
0
UTC
MH2*
MH1.5
MH1.5
F.5
MH1.5
B.5
O3fbO4
B.5
B1
O3fbO4
B1
LSD
Wt/plt
522.5
216.62
9.38
3.87
6.38
92.13
182.38
77.38
164.86
Wt/Sucker
76.68
38.25
18.13
20.4
14.85
162
84.38
101.83
53.46
(MH= Royal MH-30, F=Flupro, B=Butralin,) in (gal) O=Off-Shoot-T in (%),
UTC=untreated check, fb=followed by at 7 days. *=Sprayer malfunctioned
The Effects of Sucker
Treatment on Yield
UK Spindletop Farm
MH Free Sucker Control
Trials
• Treatments with MH produced 100% control. However,
results from Off-shoot T at 4% followed by a tank mix of Offshoot T + Butralin at 1 gal/a followed by Butralin at 1 gal/a
were close to those containing MH. The results from this
treatment (5) were not statistically better than treatments 2,
4, 6, & 7. A 3% concentration of Off-shoot T applied before
topping did not perform as well as a 4% concentration. All
Treatments were made with a West Texas Lee high
clearance sprayer using a three nozzle arrangement in a
TG-3 – TG-5 – TG-3 configuration and an application volume
of 60 gal/a. Applicator speed was 2.4 mph at 30 psi. Plots
were 30 ft by 2 rows (42” rows) in a randomized complete
block design with four replications.
MH Free Trails
Treatments
2nd Treatment At topping
( 10-25% bloom)
3rd Treatment
5 days post top
1 Off-Shoot T 3%
Off-Shoot T 4%
Butralin 1
2 Off-Shoot T 4%
Off-Shoot T 4%
Butralin 1
3 Off-Shoot T 4%
Butralin 1
4 Off-Shoot T 4%
Off-Shoot T 4%+Butralin 1
5 Off-Shoot T 4%
Off-Shoot T 4%+Butralin 1
Butralin 1
6 Off-Shoot T 4%
Flupro 1
Butralin 1
7 Off-Shoot T 4%
Butralin
Butralin 1
8 Off-Shoot T 4%
Royal MH 1.5
9 Off-Shoot T 4%
Butralin 0.5+Royal MH1.5
1st Treatment
(Elongated Bud)
10 Untreated Check
* 60 gal/a at 2.4 mph and 30 psi using a West Texas Lee high clearance sprayer
Treatments were applied 5 days apart
MH Free Trials
Comparison of Sucker Control Treatments
UK Coldstream Farm
100
89.5
96.5
90
95.75 99.75 97.75 93.5
100
100
80
60
%
40
20
0
5.83
0
1
1
1
1
.5
.5
05
B
TC
B
B
B
.
1
1
+
0
U
H
H
F1
B1
M
B1
O
M
O4
+
+
SD
4
4
4
4
4
1
L
O
O
O
O
B
O
44O
O
(MH= Royal MH-30, F=Flupro, B=Butralin,) in (gal) O=Off-Shoot-T in (%),
B1
B1
O4
O4
3
4
O
O
B1
4
UTC=untreated check (-) followed by at 5 days.
MH Free Trials
The Effects of Sucker Treatment
on Sucker Number per Plant
UK Coldstream Farm
Suckers/Plant
10.00
8.00
5.63
6.00
4.00
1.99
1.63
2.00
0.54
0.96
0.75
0.08
0.21
0.38
0.00
0.00
0.00
O
O
3-
B1
4
4
B1
4
-O
O
B
4O
1
O
4O
4-
O
4+
1
B1
1
1
B
4+
B
4
O
-B
1
-F
O
4-
B1
B1
O
4
.5
1
H
-M
+M
1
B
.5
1
H
4O
O
(MH= Royal MH-30, F=Flupro, B=Butralin,) in (gal)
C
UT
D
LS
UTC=untreated check O=Off-Shoot-T in (%), (-) followed by at 5 days
05
0.
MH Free Trials
The Effects of Sucker Treatment
on Sucker Weight
UK Coldstream Farm
300
200
(g)
100
0
O4O4O3-O4- O4-O4O4O4-F1- O4-B1- O4O4-B1
O4+B1B1+MH
B1
B1
O4+B1
B1
B1
MH1.5
B1
1.5
UTC
LSD
0.05
Wt/plt
97.3
17.5
47.5
48.8
1.9
13.8
13.3
0.0
0.0
300.0
69.9
Wt/Sucker
63.8
37.5
43.9
36.2
5.6
61.7
34.4
0.0
0.0
63.6
49.2
(MH= Royal MH-30, F=Flupro, B=Butralin,) in (gal) O=Off-Shoot-T in (%),
UTC=untreated check, (-) followed by at 5 days.
MH Free Trials: The Effects of Sucker
Treatment on Sucker Weight
UK Coldstream Farm
(MH= Royal MH-30, F=Flupro, B=Butralin,) in (gal) O=Off-Shoot-T in (%),
UTC=untreated check, (-) followed by at 5 days.
MH-Free Nozzle Study
•
Application technique changed a MH-Free sucker control program
from unsuccessful to successful. Nozzle size was studied as part
of the overall application technique trial. While a rundown method
is known to work successfully, mechanical application has proven
difficult to achieve acceptable results. All treatments were applied
with a CO2 backpack with an over-the –shoulder two row boom.
Plots were 40 ft by 2 rows (42” rows) in a randomized complete
block design with four replications.
•
Treatments consisted of 4% Off-shoot T at elongated bud
followed by a combination of Off-shoot T at 4 % plus Butralin at 1
gal /a.
MH-Free Nozzle Size Treatments
Nozzles Arrangement
PSI
MPH
Gal
1 TG-3 - TG-5 - TG-3
30
2
60
2 TG-3 - TG-5 - TG-3
30
3
50
3 TG-5 - TG-5 - TG-5
30
3
60
4 TG-5 - TG-6 - TG-5
30
3
60
Effects of Nozzle Size on Sucker Control
100
% Control
80
60
40
20
0
3-5-3 (60)
3-5-3 (50)
5-5-5 (60)
5-6-5 (60)
Nozzles (Gal/a)
All Nozzles were TG full cone nozzles
LSD 0.05
Effects of Nozzle Size on Sucker per Plant
All Nozzles were TG full cone nozzles
Effects of Nozzle Size on Yield
Woodford Co. Farm