Experiments were conducted in 2008 and 2009 at the University of Kentucky Research & Education Center near Princeton, KY and at the Murray State University West Farm near Murray, KY to evaluate efficacy of worm control from novaluron in 2008 and tobacco variety response to novaluron in 2009. The 2008 experiment included Rimon 0.83EC at 6, 9, 12, or 24 oz/A compared to local standard treatments of Orthene 97, Tracer SC, and Dipel DF in PD 7302LC dark tobacco. Burley varieties tested at Princeton included KT 206LC, KT 204LC, NC 7, KY 14xL8, and TN 90LC. Dark varieties tested at Murray included PD 7318LC, Narrowleaf Madole LC, and KY 171. In both variety response experiments, Rimon 0.83EC was applied at 0, 9, 12, or 24 oz/A. In the 2008 efficacy experiment, Rimon applied at any rate was comparable to all local standard treatments for control of hornworms. While minor phytotoxicity was seen with Rimon at 12 or 24 oz/A which reduced quality grade index, dark-fired yield was not affected by treatment. In the 2009 Burley variety response trial at Princeton, differential response to Rimon was seen among Burley varieties. The early-maturing KY 14xL8 was the most sensitive to Rimon, with the later-maturing KT 206LC, KT 204LC, NC 7, and TN 90LC varieties responding similarly to Rimon applications. KY 14xL8 treated with Rimon at 12 or 24 oz/A had significantly less total yield than untreated KY 14xL8. Average total yield across all 5 varieties treated with Rimon at 24 oz/A was significantly less than untreated average total yield across all 5 varieties. Dark varieties were generally less sensitive to Rimon. In the 2009 dark variety response trial at Murray, PD 7318LC appeared to be the most sensitive while Narrowleaf Madole LC was the least sensitive.