Herbicides are essential to today's high-production agriculture, and in many areas, herbicide-tolerant (HT) crops broaden the utility of these products. Since the mid 1990s a dominant HT system has enabled widespread use of glyphosate across multiple crops. However, the continuous use of glyphosate without accompanying resistance management best practices has led to an increase in glyphosate-resistant weed species that threatens the future use of glyphosate and the benefits it has enabled. Dow AgroSciences is developing the Enlist� Weed Control System which is based on a new family of herbicide tolerance traits, innovations in herbicide formulations, and novel approaches to technology stewardship. This system will add greater diversity to weed management programs and help sustain the gains made with glyphosate-tolerant crops by enabling more flexible use of an innovative form of 2,4-D and other herbicides in maize, soybean, and cotton. Field studies have confirmed >90% control of a wide range of weed species (including many biotypes that are resistant to glyphosate) with a combination of a new 2,4-D plus glyphosate. Crops containing Enlist� traits can withstand over twice the amount of 2,4-D plus glyphosate required for weed control with no significant impact on yield. New weed management technologies such as Enlist� will require proper stewardship, including resistance management best practices, to ensure they remain viable over a long period of time. Effective resistance management programs must be based on scientific principles as well as compatibility with established production systems. Factors influencing the development of best management practices will be discussed. (�Trademark of The Dow Chemical Company (�Dow�) or an affiliated company of Dow. Regulatory approvals are pending for the Enlist� herbicide solution and crops containing Enlist� herbicide tolerance traits. The information presented here is not an offer for sale. Always read and follow label directions. �2013 Dow AgroSciences LLC)

New tools for sustainable management of herbicide resistant weeds: The Enlist� Weed Control System

246th National Meeting (2013)

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