Sucker Control in Burley Tobacco with and without MH
Feb 05, 2016
Sucker Control in Burley Tobacco
with and without MH
Recommendations to Reduce MH Residue
Reduce MH rate and add a local Reduce MH rate and add a local systemicsystemic 1.5 gal MH + 0.5 gal Butralin, Flupro or 1.5 gal MH + 0.5 gal Butralin, Flupro or
Prime+Prime+ Use Coarse nozzlesUse Coarse nozzles
TG-3 or TG-5 full cone nozzles TG-3 or TG-5 full cone nozzles
Application
Coarse nozzles TG-5 / CE-5 or
equivalent at 4-4.5 mph
TG-3 / CE-3 or equivalent at 2.5-3 mph
Influence of Sucker Control Across Four Location on Burley Tobacco Yield
2380 2507 2557 2411 2578 2546
0
500
1000
1500
2000
2500
3000
Yie
ld lb
/a
Locations = Bath, Knox, Jackson & Pendleton LSD 0.05 = 177
Effects of Application of MH by Coarse vs Fine Nozzles on Yield of
Burley Tobacco
0
500
1000
1500
2000
2500
3000
3500
4000
Yie
ld lb
/a
Fine 2398 3105 1713 2352 2074 2697 2194 2911 2355
Coarse 2617 3474 1998 2498 2291 2949 2397 3014 2524
Bath Fleming Jackon Knox LaurelLawrenc
eNelson
Pendleton
Average*
Average MH Residues by State
1997-2004
0102030405060708090
100110120 ppm MH
1997 71 112 70 5 69 57 18 65
1998 79 38 62 11 59 48 17 70
1999 80 96 79 22 51 45 36 72
2000 48 32 95 31 20 44 52 46
2001 39 29 11 10 48 24 13 32
2002 38 36 13 32 34 30 35
2003 35 45 17 13 32 23 9 30
2004 39 42 58 20 25 26 34 35
KY IN MO NC OH TN VA ALL
Limited sample numbers on all but KY and TN 2000 - 2004 values are from warehouse sales only
Range of MH Residues in Kentucky for 1997 - 2004
0102030405060708090
100
%
Extremely High 2 9 5 0 1 2 0 3
Very High 14 10 15 5 5 3 2 5
High 21 14 21 13 5 9 7 6
Medium 29 30 25 33 27 22 26 16
Low 34 38 33 49 63 64 63 71
1997 1998 1999 2000 2001 2002 2003 2004
Low < 41, Medium = 41-80, High = 81-120, Very High = 120 - 200, Extremely High >200 ppm
Advantages - Disadvantages - Disadvantages
Higher yields Better returns Improved sucker control Lower MH residue Extended Control 5-7 wks Rain safety after 2 hrs Not as weather dependent No cover crop concern No ground sucker concern Improved grower
confidence Produces darker cured leaf
Higher CostHigher Cost
MH Free TobaccoMH Free Tobacco
Location Day Treatment Boom Nozzle Drought Sucker Control Comments
Home 16 Prime + Straight TG-3 Low Fair-PoorTwo - Three 4-7" suckers in 1/2 of
plants in top
Dodd 16 Butralin Straight TG-3 Moderate Good Occasional 4-7" sucker
Dodd 16 Prime + Straight TG-3 Moderate Good Occasional 4-7" sucker
Dodd 16 Butralin 3 nozzle TG-3&5 Low-Mod Excellent Few suckers
Dodd 16 Prime + Straight TG-3 Moderate Good Occasional 4-7" sucker
Creek* 9 Prime + Straight TG-5 Mod-High Good Occasional 4-7" sucker
By-Pass** 15FA+ Flupro Straight TG-5 0-Low Poor Two 5-9" in tops of most plants
By-Pass** 15 Prime + Straight TG-5 0-Low PoorThree or more suckers in tops of
most plants
Shop** 14 Prime + Straight TG-5 0-Low FairTwo - Three 5-9" suckers in 1/3 of
plants in top
MH Free Tobacco Trial
MH Free Tobacco TrialObservations
Fair to good control for first 10 to 14 daysFair to good control for first 10 to 14 days No difference between Prime +, Butralin, or No difference between Prime +, Butralin, or
Flupro observedFlupro observed ““Escapes” common at the top of plant Escapes” common at the top of plant
Up to 2 or 3 suckers per plantUp to 2 or 3 suckers per plant Three nozzle arrangement slightly better Three nozzle arrangement slightly better
Must be kept directly over the rowMust be kept directly over the row Poor control when off rowPoor control when off row
Each Leaf Direct Each Leaf Direct Sucker Material Sucker Material
to the Stalkto the Stalk
3/83/8thth Phyllotaxy Phyllotaxy How leaves are How leaves are
arranged on the arranged on the stalkstalk
Successful Methods Hand
Jug method Backpack
High Clearance Sprayer Drop Lines
Workable Methods vs. Labor