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Posted 10 July 2003. PMN Crop News.

Denim Insecticide Now Registered for Use on Cotton, Tobacco

Extension entomologists welcome unique mode of action, ease to beneficial insects and resistance management tool

Syngenta Crop Protection.

Greensboro, NC (July 10, 2003) - Denim™ insecticide, from Syngenta Crop Protection Inc., recently received registration from the U.S. Environmental Protection Agency for control of a broad spectrum of economically damaging lepidopteran pests in cotton and tobacco, including tobacco budworm, armyworms and cotton bollworm.

“Denim provides excellent control of all worm-pests, especially tobacco budworm and armyworms, and also suppresses mites with minimal impact on beneficial insects, making it an ideal fit for integrated pest management programs,” said Patrick Ewan, Syngenta crop manager. “Denim is a low use-rate product that offers long residual control. It is a unique chemistry with no known cross-resistance, and it works through three modes of action – contact, ingestion and ovicidal-like in which larvae are controlled as they chew through egg casings.”

New Tool for Cotton Worm Control, Mite Suppression

Denim has been used under Section 18 Emergency Exemptions in several states, including Arkansas, Louisiana, Texas and Mississippi, in the past for control of tobacco budworm and/or beet armyworm. Cotton researchers in Mississippi and Texas who have been evaluating Denim the past several years for lepidopteran control have reported excellent field trial results.

“Denim will control all of the caterpillar pests we have in cotton. This includes tobacco budworm and cotton bollworm, as well as armyworms and loopers,” said Blake Layton, entomologist with the Mississippi Extension Service. “Its primary fit is for control of tobacco budworm and other caterpillar pests on non-Bt cotton and armyworms in Bt cotton, but in some trials, Denim also suppressed spider mites, which gives growers another tool in their overall cotton management program.”

Chris Sansone, Extension entomologist with the Texas Cooperative Extension Service in San Angelo, has found Denim to perform extremely well in controlling beet armyworm outbreaks throughout West Texas, triggered in recent years by prolonged dry weather. He also sees it fitting in a tobacco budworm management program.

“Denim has looked extremely good in our tobacco budworm trials,” Sansone said. “Because this pest is resistant to some of the more traditional insecticides used in Texas, Denim will be an excellent resistance management tool.”

Tough on Tobacco Pests, Easy on Beneficial Insects

In the Carolinas and southeast, tobacco researchers have conducted trials with Denim for the past few years with favorable results and welcome having a new chemistry to use as they help growers protect the leaf from damaging pests like tobacco budworm.

Sterling Southern, an Extension tobacco entomologist with North Carolina State University, has seen promising results in his trials. “In the majority of our trials, Denim has been one of the more effective sprayable materials. We have evaluated Denim in tobacco for several years, looking closely at its tobacco budworm control during the past two years. Denim has given us good results and will be given a good to excellent rating based on what we’ve seen in our trials,” Southern explained.

“Denim offers us a different mode of action; it’s another tool to rotate through to avoid resistance. Compared to other products, Denim gives good tobacco budworm control. That is the key fit Denim has in tobacco,” Southern added.

Kerry Henderson
Gibbs & Soell Public Relations
Phone: 919-870-5718

Barbara Blackney
Syngenta Crop Protection
Phone: 336-632-2376