Dark-fired and burley tobacco experiments were conducted near Murray, KY, in 2011 to evaluate sucker control from mechanical spray applications containing maleic hydrazide (MH) and MH-free treatments applied with standard 3-nozzle per row arrangements or through conveyor hoods placed over 3-nozzle per row systems. Applications included fatty alcohol (Off Shoot T^®) applied 1 wk prior to topping and at topping, MH (Royal MH- 30^®, 1.5 lb ai/gal), flumetralin (Flupro^®), and Butralin. MH treatments in the dark trial included MH (1.5 or 1.0 gal/A) + Flupro (0.5 gal/A) or MH alone at 1.5 gal/A. Non-MH treatments in the dark trial included sequential (2) applications 1 wk apart of Off Shoot T + Flupro or Off Shoot T plus Butralin. Data for percent sucker control, number of plants with suckers per 30 plants, green sucker weight per 10 plants, and dark-fired yield showed that any MH treatment resulted in sucker control and yield that was much better than sequential applications with Flupro or Butralin. Sucker control from MH treatments was not affected by use of conveyor hoods, while sucker control in non-MH treatments was slightly improved with the use of conveyor hoods. In the burley trial, only MH treatments from the dark trial were included along with the control treatment. Sucker control in the burley trial ranged from 93 to 98% in MH treatments and was not affected by the use of conveyor hoods. Leaf samples were collected from MH treatments in the burley trial, and we analyzed for MH residue content. There were significant reductions in MH residue where MH rate was reduced to 1 gal Royal MH-30/A and where conveyor hoods were used with 1.0 or 1.5 gal Royal MH-30/A. (Reprinted with permission)