Adjuvants to be Key with Newer Herbicide Technology

With dicamba-and 2,4-D-tolerant cropping systems hitting the market, adjuvants will be crucial to improving efficacy and reducing drift.


BETTER KILL. The right adjuvant makes a difference in weed control, as this side-by-side, same-field comparison shows. The weeds on the left were treated with Sonic herbicide and a conventional MSO adjuvant. Those on the right were treated with Sonic and a crop oil concentrate.

Photo Courtesy United Suppliers

Adjuvants in herbicides have been an important part of the mix for no-tillers since the first household detergent was added to a tank of Roundup somewhere in distant history.

Adjuvant use has become much more scientific and precise over the years. But researchers say the cost of crop-protection chemistry, the battle with herbicide-resistant weeds, and the need to maximize yields will make the proper use of adjuvants even more important to farmers in years to come.

More Complex

Making sure herbicides effectively arrive at their intended destination is a top priority, and to do that, the crop protectant industry is trending toward the use of more combinations of different adjuvants, as opposed to a simple surfactant and ammonium sulfate (AMS) addition to the tankmix, says Patrick McMullan, adjuvant development manager at United Suppliers in Ames, Iowa.

Because of the need to maximize efficacy of crop protectants due to the use of additional herbicides with glyphosate, McMullan says more no-till farmers using glyphosate-based programs are increasing their use of oil-based adjuvants such as Methylated Seed Oils (MSO) and petroleum-based crop oil concentrates (COC).

Rich Zollinger, Extension weed specialist at North Dakota State University, says while growers are shifting to more complex adjuvant…

To view the content, please subscribe or login.
 Premium content is for our Digital-only and Premium subscribers. A Print-only subscription doesn't qualify. Please purchase/upgrade a subscription with the Digital product to get access to all No-Till Farmer content and archives online. Learn more about the different versions and what is included.

Dan crummett 0618

Dan Crummett

Dan Crummett has more than 35 years in regional and national agricultural journalism including editing state farm magazines, web-based machinery reporting and has an interest in no-till and conservation tillage. He holds B.S. and M.S. degrees from Oklahoma State Univ.

Top Articles

Current Issue


No-Till Farmer

Get full access NOW to the most comprehensive, powerful and easy-to-use online resource for no-tillage practices. Just one good idea will pay for your subscription hundreds of times over.

Subscribe Now

View More

Must Read Free Eguides

Download these helpful knowledge building tools

View More
Top Directory Listings