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EVALUATION OF MH FREE CHEMICALS FOR SUCKER CONTROL

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Three or more suckers in tops of most plants. Shop. 14. Prime Straight ... from Off-shoot T at 4% followed by a tank mix of Off-shoot T Butralin at 1 gal ... – PowerPoint PPT presentation

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Title: EVALUATION OF MH FREE CHEMICALS FOR SUCKER CONTROL


1
EVALUATION OF MH FREE CHEMICALS FOR SUCKER
CONTROL
  • Gary Palmer, Bob Pearce Andy Bailey
  • University of Kentucky

2
MH Free Tobacco - 2005
Trials were conducted in Jessamine County to
study the mechanical application of sucker
control chemicals that do not contain Maleic
Hydrazide. Control has been well documented with
methods that run Butralin, Flupro or Prime down
the stalk. However, such methods are slower and
labor intensive and not likely to be adopted by
larger growers.
3
Spraying with Coarse Nozzles
4
MH Free Tobacco Trial
5
MH Free Tobacco Trial
6
Summary - 2005
  • Although initial results were encouraging, none
    of the treatments provide acceptable control in
    the end.

7
MH Free Tobacco - 2006
  • Chemicals Trial
  • Topping Study

Not applied due to weather
8
MH Free Tobacco - 2006
  • Nozzle Study

All treatments were applied with a CO2 backpack
with an over-the shoulder two row boom. Plots
were 40 ft by 2 rows (40 rows) in a randomized
complete block design with four replications.
9
Comparison of Sucker Control Treatments on Degree
of Control Harrison Co. - Ricci Rowland Farm
RTMRoyal Tac M, ButButralin, MH Royal MH-30,
fbfollowed by at 7 days
10
Comparison of Sucker Control Treatments on Yield
of Burley Tobacco Harrison Co. - Ricci Rowland
Farm
RTMRoyal Tac M, ButButralin, MH Royal MH-30,
fbfollowed by at 7 days
11
MH Free Topping Study Harrison Co. - Ricci
Rowland Farm
12
MH Free Nozzle Study Harrison Co. - Ricci
Rowland Farm
13
Summary - 2006
  • Although initial results were encouraging, none
    of the treatments provide acceptable control in
    the end except for the one containing MH.

14
Sucker Control Trials - 2007
  • The Regional Sucker Control Trials are conducted
    under the auspices of the Regional Growth
    Regulator Committee of the Tobacco Workers
    Conference. Treatments proposed by the committee
    were treatments 1-7. Treatment 8 was added for
    this study only.

15
Regional Sucker Control Treatments
16
Comparison of Sucker Control Treatments at Two
Weeks after Application UK Spindletop Farm
(MH Royal MH-30, FFlupro, BButralin,) in (gal)
OOff-Shoot-T in (), UTCuntreated check,
fbfollowed by at 7 days. Sprayer malfunctioned
17
The Effects of Sucker Treatment on Sucker Number
per Plant UK Spindletop Farm
(MH Royal MH-30, FFlupro, BButralin,) in (gal)
OOff-Shoot-T in (), UTCuntreated check
fbfollowed by at 7 days. Sprayer malfunctioned
18
The Effects of Sucker Treatment on Sucker Weight
UK Spindletop Farm
(MH Royal MH-30, FFlupro, BButralin,) in (gal)
OOff-Shoot-T in (), UTCuntreated check,
fbfollowed by at 7 days. Sprayer malfunctioned
19
The Effects of Sucker Treatment on YieldUK
Spindletop Farm
20
Summary
  • A sprayer malfunction produced results that were
    not characteristic of the past performance of MH
    at 2 gal/a.
  • Treatments 3 (MH at 1.5 gal/a), 4 (MH at 1.5
    gal/a Flupro at 0.5 gal/a), 5 (MH 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 MH containing
    treatments 3-5.
  • Butralin at 1 gal/a by itself was as good as when
    Off-shoot T was added.

21
MH Free Trials - 2007
  • 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.

22
MH Free Trails Treatments
23
MH Free TrialsComparison of Sucker Control
TreatmentsUK Coldstream Farm
(MH Royal MH-30, FFlupro, BButralin,) in (gal)
OOff-Shoot-T in (), UTCuntreated check (-)
followed by at 5 days.
24
MH Free TrialsThe Effects of Sucker Treatment
on Sucker Number per Plant UK Coldstream Farm
(MH Royal MH-30, FFlupro, BButralin,) in (gal)
UTCuntreated check OOff-Shoot-T in (), (-)
followed by at 5 days
25
MH Free TrialsThe Effects of Sucker Treatment
on Sucker Weight UK Coldstream Farm
(MH Royal MH-30, FFlupro, BButralin,) in (gal)
OOff-Shoot-T in (), UTCuntreated check, (-)
followed by at 5 days.
26
MH Free Trials The Effects of Sucker Treatment
on Sucker Weight UK Coldstream Farm
(MH Royal MH-30, FFlupro, BButralin,) in (gal)
OOff-Shoot-T in (), UTCuntreated check, (-)
followed by at 5 days.
27
Summary
  • Treatments with MH produced 100 control
  • Results from Off-shoot T at 4 followed by a tank
    mix of Off-shoot T Butralin at 1 gal/a followed
    by Butralin at 1 gal/a were close to those
    containing MH.
  • Results from the above treatment were not
    statistically better than
  • Off-shoot T at 4 fb Off-shoot T 4 fb Butralin
    1
  • Off-shoot T at 4 fb Off-shoot T 4 Butralin 1
  • Off-shoot T at 4 fb Flupro 1 fb Butralin 1
  • Off-shoot T at 4 fb Butralin 1 fb Butralin 1
  • A 3 concentration of Off-shoot T applied before
    topping did not perform as well as a 4
    concentration.

28
MH-Free Nozzle Study - 2007
  • 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 with a TG-(3-5-3) arrangement.
    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.

29
MH-Free Nozzle Study Treatments
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.
30
Effects of Nozzle Size on Sucker Control
All Nozzles were TG full cone nozzles
31
Effects of Nozzle Size on Sucker per Plant
All Nozzles were TG full cone nozzles
32
Summary
  • Yields are not yet available
  • Percent control and suckers per plant were not
    significantly different

33
Acknowledgement
  • Financial Support
  • Chemtura Corporation
  • Establishment, Plot Maintenance, Data Collection
  • Dr. Bob Pearce Edwin Ritchie
  • Treatments
  • Interns Austin Perkins Keith Johnson
  • Equipment
  • Dr. Kenny Seebold
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