FOR IMMEDIATE RELEASE (January 30, 2025 – Alsip, IL) – Nufarm Americas Inc. announced that Scorch® EXT Herbicide has received 24(c) registration in Colorado for broadleaf weed control in fallow and eco-fallow fields. A herbicide premix powered by Nufarm’s proprietary Duplosan® technology, Scorch EXT was developed in response to the increasing threat of kochia, including biotypes resistant to glyphosate, dicamba, 2,4-D and/or fluroxypyr in groups 2, 5, 9 and 14.
Surveys by the Weed Science Society of America (WSSA) have increasingly identified kochia among the most troublesome weeds pressuring cereal grains, field corn and grain sorghum growers, making kochia control in fallow a critical management requirement.
Research by leading Colorado State University and Kansas State University weed scientists, including Dr. Lovreet Shergill, Dr. Phil Westra and Dr. Vipan Kumar, has verified resistance to glyphosate, dicamba, 2,4-D and/or fluroxypyr in various populations of kochia. Additionally, kochia biotypes resistant to more than one herbicide have grown substantially in recent years.
“Expanding the use of Scorch EXT to fallow ground in Colorado is critical to address the challenges of resistant kochia on a regional basis,” said Daniel Beran, Ph.D., Nufarm Director of Technical Services Ag USA. “Field trials of Scorch EXT have shown it is a very effective solution for biotypes of kochia resistant to multiple other herbicides in the Great Plains.”
Scorch EXT features a combination of dichlorprop-p, dicamba and 2,4-D. Dichlorprop-p is an active ingredient historically used in mixtures for brush control that remained unexplored until recently. In the past few years, university and third-party research with Scorch EXT has demonstrated excellent and very consistent control of kochia. Scorch EXT is an ideal option where resistant kochia and other tough-to-control broadleaf weeds are a threat. Previously approved in Kansas and Montana, it’s now labeled in Colorado under a 24(c) label for use in fallow or eco-fallow fields to control kochia, Russian thistle, common lambsquarters, Canada thistle, Palmer amaranth, wild mustard and tansy mustard.
In addition to the 24(c) labels in Kansas, Colorado and Montana, Scorch EXT is also approved for IVM applications, including general farmstead and non-crop areas including rights-of-way, fence rows and industrial sites. It is currently pending EPA registration for additional crop uses.
Learn more about Scorch EXT Herbicide
For a complete list of Nufarm products, visit nufarm.com/uscrop. Before applying any Nufarm product, confirm that it is registered for use in your state. Important: Always read and follow label instructions.
Established in Australia more than 100 years ago, Nufarm is recognized as one of the leading manufacturers and suppliers of crop protection and seed treatment in the world. In the US, Nufarm is committed to bringing innovation and choice to distributors, retailers and the growers they serve from three state-of-the-art manufacturing facilities located to serve the North American channel.
Nufarm Americas Inc. is a subsidiary of Nufarm Limited, a manufacturer, supplier and marketer of crop protection products based in Australia. Nufarm is recognized as one of the leading agricultural and turf chemical manufacturers in the world. Nufarm Americas Inc. formulates products that serve the agricultural, professional turf, vegetation management and forestry markets in the United States.
