1. MH Free Tobacco Trials were conducted in Jessamine County to study the mechanical application of sucker control chemicals that do not contain Maleic Hydrazide. Although initial results were encouraging, none of the treatments provide acceptable control in the end. 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.

2. Spraying with Coarse Nozzles

3. LocationDayTreatmentBoomNozzleDrought Sucker ControlComments Home16Prime +StraightTG-3LowFair-Poor Two - Three 4-7" suckers in 1/2 of plants in top Dodd16ButralinStraightTG-3ModerateGoodOccasional 4-7" sucker Dodd16Prime +StraightTG-3ModerateGoodOccasional 4-7" sucker Dodd16Butralin3 nozzleTG-3&5Low-ModExcellentFew suckers Dodd16Prime +StraightTG-3ModerateGoodOccasional 4-7" sucker Creek* 9Prime +StraightTG-5Mod-HighGoodOccasional 4-7" sucker By-Pass**15 FA+ FluproStraightTG-50-LowPoorTwo 5-9" in tops of most plants By-Pass**15Prime +StraightTG-50-LowPoor Three or more suckers in tops of most plants Shop**14Prime +StraightTG-50-LowFair Two - Three 5-9" suckers in 1/3 of plants in top MH Free Tobacco Trial

4. 2005 Burley Tobacco Sucker Control Trial UKREC, Princeton, KY Andy Bailey Extension Tobacco Specialist Univ. of KY / Univ. of TN

5. Sucker Control Trial for Burley Tobacco UKREC, Princeton, KY - 2005 ‘TN 90’ burley –Set May 25, 2005 –40” x 32” plant spacing –4900 plants/A 1 st topping July 26 –Uneven, so Royal Tac M applied at 2 gal/A down the stalk to topped plants in all plots –2 nd and final topping July 31 All treatments applied Aug. 5 –Over-the-top straight boom coarse spray with TG-5 nozzles, 20” spacing, 50 GPA Treatments: 1)Untreated check (TNS) 2)Royal MH-30 (2 gal/A) 3)Royal MH-30 (1.5 gal/A) 4)Royal MH-30 (1.5 gal) + Butralin (0.5 gal) 5)Royal MH-30 (1.5 gal) + Flupro (0.5 gal) 6)Royal MH-30 (1 gal) + Butralin (0.5 gal) + Royal Tac M (2 gal) 7)Royal MH-30 (1 gal) + Flupro (0.5 gal) + Royal Tac M (2 gal) 8)Butralin (0.5 gal) 9)Flupro (0.5 gal)

6. RCBD design with 4 replications Plots 4-rows, 40 ft. long (60 plants/plot) All data collected from center 2 rows –30 plants/plot Data collected: –Sucker control: 4.5 wks after topping (just prior to harvest) Visual % sucker control Green sucker weight –30 plants per plot on trts 2-9 –6 plants per plot on trt 1 (TNS), extrapolated for 30 plants –Cured leaf yield (4 stalk positions) –Grade Index and Revenue (based on 2004 grade and price support) Sucker Control Trial for Burley Tobacco UKREC, Princeton, KY - 2005

7. Sucker Control 4.5 wks after topping UKREC, Princeton, KY - 2005 TreatmentRate/A Visual Control Sucker wt./ 30 pl (gal/A) ------%------Lbs/30 plants TNS00 d220 a Royal MH-302 gal72 a22 c Royal MH-301.5 gal60 b29 c Royal MH+Butralin1.5 + 0.566 ab30 c Royal MH + Flupro1.5 + 0.564 ab21 c Royal MH+Butralin + Royal Tac M 1.0 + 0.5 + 2 62 b41 ab Royal MH+Flupro + Royal Tac M 1.0 + 0.5 + 2 58 b34 bc Butralin0.544 c59 b Flupro0.540 c59 b LSD(0.05)828

8. Burley Tobacco Yield UKREC, Princeton, KY - 2005 Yield (lbs/A) TNSMH 2 gal MH 1.5 gal MH + Butra 1.5+0.5 MH + Flupro 1.5+0.5 MH+ Butra+ RTM 1+0.5+2 MH+ Flupro+ RTM 1+0.5+2 Butra 0.5 Flupro 0.5 Total Yield (lbs/A): 1537 2013 1945 1947 1738 2016 1942 1414 1745 LSD 0.05 = 74 133 206 55 303 (total)

9. Burley Grade Index and Revenue UKREC, Princeton, KY – 2005 *Grade Index and Revenue based on 2004 federal grade and support price for Type 31 burley tobacco. Gross Revenue ($/A) TNSMH 2 gal MH 1.5 gal MH + Butra 1.5+0.5 MH + Flupro 1.5+0.5 MH+ Butra+ RTM 1+0.5+2 MH+ Flupro+ RTM 1+0.5+2 Butra 0.5 Flupro 0.5 Grade Index: LSD(0.05) = 4.7 56.9 60.0 57.3 60.0 56.5 60.9 56.2 53.3 58.1 LSD(0.05) = 608