Helpful Herbicide Hints

Each year a new batch of herbicides is launched by crop protection manufacturers — and your grower-customers depend on you, as their retailer, to explain how each product may or may not fit into their production programs.

That’s not so easy, is it? That’s why we’ve brought in Reid W. Acker, our fictional but competent in-house herbicide advice columnist, to help you sort through your key questions and concerns. Step aside Dear Abby; Reid the Weed Man’s on the case.

Dear Reid: So, what’s new in herbicides this year?

My Extension contacts around the Midwest say most of the active ingredients (a.i.s) in the new crop of herbicide products aren’t new (see chart), but the a.i. combinations are. “Other than Laudis, all the materials are existing active ingredients in new premixes,” says Chris Boerboom, University of Wisconsin Extension weed scientist, noting that therein lies the trick to knowing the new material. Recognizing the component products you’re well acquainted with will allow you to build on familiar properties. “If you understand the ingredients, you understand the product pretty well,” he says. OK, I’ll follow that advice and try to mention the familiar product names to make this easier.

Dear Reid: How do the new herbicides fit into a glyphosate resistance management program?

Resistance management is quite critical. Bill Johnson, Purdue University Extension weed scientist, says it needs to become part of your growers’ routines, especially where fields are typically sprayed with glyphosate three to four times a season. “They need to take the management approach as if this population is developing a low level of resistance,” he says. “There’s a couple of strategies. The cheapest is to really be aggressive in managing it in corn. Drive it down, using broadleaf herbicides and 2,4-D.”

In soybeans, he recommends starting with a clean field, especially in no-till systems. “If we get them to start clean and use a residual herbicide to try to keep the giant ragweed in check, it allows for timely glyphosate treatments. And get the glyphosate rate up as high as they legally can in that first postemergence treatment.”

Laudis is a bleaching herbicide, with the same mode of action as Callisto and Impact, says Bob Hartzler, Iowa State University Extension weed specialist. “It’s for postemergence control in corn, with activity on grass and broadleaf species, although it is stronger on broadleaves. Laudis has the best grass control of the three post bleachers, but probably not good enough to be a stand-alone grass product, and will provide some residual control of weeds.” The safener in Laudis allows it to be used on all corn types.

“Halex GT is a new approach at a one-pass program in glyphosate-resistant corn. It is applied early post with the glyphosate controlling emerged weeds and the metolachlor and mesotrione (Dual and Callisto) controlling weeds that emerge after the application. It’s a reasonable approach, but it does have some risks: 1) application must be timely to prevent weeds that emerge with the crop from impacting yield potential. In fields with heavy infestations there would be a high risk if weather conditions keep the sprayer out of the field when intended; 2) in order to get good control of weeds emerging after application, it will be important to get a good rainfall within three to seven days of application in order to activate the herbicide.”

Dear Reid: What does this year’s crop of soil residuals offer my growers?

That’s a great question, since using a soil residual product is one of the strongest methods of resistance management. Aaron Hager, University of Illinois at Urbana-Champaign Extension weed specialist, reminds us that these products can be used in more than one way. “The underlying thing is that obviously glyphosate is going to need some assistance for certain species, so several of these new products will be well-suited as tank-mix partners, whereas others would be good residual herbicides. We simply need to continue using residual products from a weed interference standpoint,” he says. “You don’t see any new a.i.s in the postemergence glyphosate arena, for example, so if you run out of options for the postemergence control of, say, waterhemp in soybeans, we don’t have any post options coming in the marketplace. We may have to rely more exclusively and heavily on some of the soil residuals.”

Manufacturers understand all this and continue to bring forth new soil residual products. DuPont‘s Envive and Enlite “are premixes of Classic, Harmony GT, and Valor,” says Christy Sprague, Michigan State University (MSU) Extension weed scientist. Mike Owen, Iowa State University Extension weed specialist, adds that the pair have two modes of action, the PPO inhibitor plus ALS. Envive targets the central and southern soybean growing regions, and Enlite — containing less Classic and with no soil pH restrictions — will be marketed in Minnesota, Wisconsin, and northern Iowa.

“Valor XLT is a good product in the soybean market where growers have glyphosate resistance concerns about stewardship performance,” says Bryan Young, Southen Illinois University weed scientist.

Hartzler notes that Authority MTZ, Prefix, Valor XLT, Envive, and Enlite will compete for the same niche, the preemergence market in Roundup Ready soybeans. “None of them will provide full-season, broad-spectrum weed control,” he says. “However, what they do provide is good early-season weed control/suppression that greatly reduces the likelihood of weeds impacting yield potential prior to the postemergence glyphosate applications. This allows the postemergence application to be delayed long enough that there normally won’t be a need to make a second application to deal with late-emerging weeds.”

“They also can reduce the likelihood that weeds resistant to glyphosate will survive,” Hartzler says. “In research I did a couple years ago, PRE treatments reduced selection pressure by 70% to 95% depending on the species. Envive and Enlite would probably have the best burndown activity on winter annual weeds, but all of them do have some foliar activity.”

“SureStart is a premix intended to capture the preemergence market in herbicide-resistant corn,” adds Hartzler. “It’s a premix of acetochlor and the products in Hornet, labeled at lower rates than used in conventional corn since the intent is to only suppress weeds prior to the postemergence application rather than provide full-season control.”

Dear Reid: It seems like any conversation about herbicides revolves around glyphosate, doesn’t it?

It sure does. MSU’s Sprague says it’s almost inevitable with today’s technology. “When you look at the new seed genetics, almost everything is starting to have glyphosate resistance in it, so it’s to be expected,” she explains.

Dear Reid: We had a nasty frost last spring and had to replant our corn crop. Anything new out there for killing off a failed corn stand?

Actually, yes. Select Max from Valent is now labeled for that very use. The University of Wisconsin’s Boerboom notes that it will be a good product for killing a field damaged by frost or flood before replanting.

Dear Reid: I’ve heard about a few deals between some of the ag-chem manufacturers. How will those affect my dealership?

There have been several recent agreements created with the intent to bring improved herbicide options to the market sooner — and that’s good news for your bottom line. For example, DuPont and Valent formed a flumioxazin pact in early 2007 which allows DuPont access to Valent’s soybean active ingredient. Pending registration, DuPont hopes to have products in the market by spring.

DuPont’s seed company, Pioneer Hi-Bred International, has added several herbicides to its TruChoice Opportunity Program: Syngenta‘s Touchdown Total and Touchdown HiTech and AMVAC Chemical Corp.‘s Impact 2.8SC.

In a similar vein, Valent’s Valor, Valor XLT, and Gangster herbicides have been added to Monsanto‘s Roundup Rewards START CLEAN, STAY CLEAN Assurance Plan for Roundup Ready soybeans.

Dear Reid: Any future products you can tell us about?

Naturally, companies can be nervous about EPA’s view of pre-registration talk, but BASF is excited about a herbicide containing a new a.i., currently named BAS 800. Hager says this product is significant, because it shows that the industry is still working to register new actives.

Leave a Reply

One comment on “Helpful Herbicide Hints

  1. Hi im the site coordonator of the Incitec PDC in Townsville Australia. I have a problem when running the blenders at 100t hr no differance to 80t hr. If you have any ideas I would like to know thanks mate.

Herbicides Stories

glyphosate
Crop InputsWHO: Glyphosate ‘Unlikely’ To Cause Cancer
May 16, 2016
Via Reuters.com reporter Kate Kelland: The weed-killing pesticide glyphosate, made by Monsanto and widely used in agriculture and by gardeners, Read More
dicamba, Roundup Ready 2 Xtend
Crop InputsASA: No Dicamba On Roundup Ready 2 Xtend In 2016
May 16, 2016
While Roundup Ready 2 Xtend (RR2X) are tolerant to dicamba and glyphosate herbicides, no dicamba herbicides will be approved for Read More
CPP, glyphosate, dicamba, atrazine,
Crop InputsReport: Congress Pressing EPA On Glyphosate Review Handling
May 16, 2016
Via Reuters.com reporter P.J. Huffstutter: U.S. lawmakers have asked EPA to explain why it published – and then withdrew – Read More
Palmer amaranth in soybean stubble
HerbicidesWSSA: Billions In Potential Economic Losses From Uncontrolled Weeds
May 4, 2016
What losses would corn and soybean growers experience if they were forced to eliminate herbicides and other control techniques from Read More
Trending Articles
Food IT
Industry NewsCalifornia Event Will Mix Ag And Tech Professionals To Explore IT Solutions
June 20, 2016
Silicon Valley is hot on agriculture, and an upcoming event in California will bring together the food and tech industries Read More
Monsanto Luling Plant
Eric SfiligojWhat’s Next For Monsanto?
May 31, 2016
For the folks at Monsanto’s headquarters in St. Louis, MO, it has been an eventful few weeks. Back on May Read More
Soybean Plant closeup
Industry NewsMonsanto Rejects Bayer Bid; Open To More Talks
May 25, 2016
Monsanto Co, the world’s largest seed company, turned down Bayer AG’s $62 billion acquisition bid as “incomplete and financially inadequate” Read More
Eric SfiligojPity The Monsanto Haters
May 23, 2016
An old saying goes thus: “Be careful what you wish for. You just might get it.” Given current events, there Read More
Monsanto Luling Plant
Crop InputsReport: Bayer Eyeing Monsanto For Possible Mega-Merger
May 16, 2016
Bayer AG is exploring a potential bid for U.S. competitor Monsanto Co. in a deal that would create the world’s Read More
Aerial Drone
Precision AgA Deeper Dive Into The Future Of Precision Ag
May 9, 2016
For about two decades now, through the good and the bad times, the ups and the downs inherent in agriculture, Read More
Latest News
Allen Summers Asmark Institute PSM Training
EmployeesAsmark Institute Sponsors 25 ResponsibleAg Auditor Trai…
June 21, 2016
The Asmark Institute has announced plans to provide 25 scholarships through their affiliated State fertilizer and agrichemical associations to help encourage Read More
Kennebec Elevator
CropLife 100Wheat Growers Celebrates Kennebec Elevator Grand Openin…
June 21, 2016
Over 250 patrons and guests were on hand to celebrate Wheat Growers’ Kennebec Elevator grand opening. South Dakota Secretary of Read More
Land O Lakes
Industry NewsLand O’Lakes To Acquire Ceres
June 20, 2016
Land O’ Lakes, Inc. and Ceres, Inc. have announced that they have signed a definitive merger agreement under which Land O’Lakes Read More
Food IT
Industry NewsCalifornia Event Will Mix Ag And Tech Professionals To …
June 20, 2016
Silicon Valley is hot on agriculture, and an upcoming event in California will bring together the food and tech industries Read More
LegislationVilsack Christens WinField Crop Adventure, Talks Monsan…
June 17, 2016
The WinField Crop Adventure grand opening ceremonies at Fair Oaks Farms (near Winemac, IN) welcomed USDA Secretary of Agriculture Tom Read More
Crop InputsFields of the Future: WinField Doubles Down with Agri-E…
June 16, 2016
Land O’Lakes, Inc., joined by Agriculture Secretary Tom Vilsack, today will host Fields of the Future, a live broadcast about Read More
Bayer sign
Crop InputsMonsanto Turns Back Bayer Again
June 14, 2016
Bayer AG’s bid to buy Monsanto Co. for more than $60 billion has hit an impasse that could pose a Read More
Young Corn Field
Crop NutritionNext Generation Of Nitrogen Efficiency Technology Conve…
June 13, 2016
Commodity price projections indicate farmers will continue to face tight margins again this year. Delivering higher yields and more bushels Read More
Industry NewsLa Crosse Seed Acquires Cover Crop Solutions Brand
June 10, 2016
La Crosse Seed announces that it is the new and exclusive owner of the entire family of brands of Cover Read More
ManagementTravel Plans and EU Rejection of Glyphosate, Biotech Cr…
June 9, 2016
Editors Paul Schrimpf and Eric Sfiligoj talk about upcoming trips and the latest in the European Union’s moves against glyphosate Read More
Aspire with Boron
Crop InputsStudy: Aspire with Boron Ups Alfalfa Yields
June 8, 2016
Alfalfa growers are successfully improving yields through the cutting season by applying an important micronutrient. In a recent study, The Read More
Industry NewsAGCO Announces Tragic Death of Longtime Employee
June 8, 2016
It is with deepest regret that we announce the passing of our dear friend, colleague and customer advocate-in-chief Kevin W. Read More
Wheat Field North Dakota
Industry NewsBASF Inks Northern Seed for Clearfield Wheat R&D Li…
June 6, 2016
BASF has licensed Northern Seed LLC to perform research and development of BASF’s proprietary and patented Clearfield technology in wheat. Read More
ManagementBayer/Monsanto, EU/Glyphosate, Corn/Soybeans
June 2, 2016
Editors Paul Schrimpf and Eric Sfiligoj discuss the latest regarding industry mergers, the glyphosate debate in Europe, and an update Read More
Growers looking at soybeans
Industry NewsKoch Licenses 2 Marrone Products For North American Dis…
June 2, 2016
Koch Agronomic Services (Koch), with support from its affiliate, Koch Biological Solutions, has secured exclusive rights to sell REGALIA Rx Read More
Gypsum
Industry NewsBeneficial Reuse Management Launches GYPSOIL BLENDABLE
June 2, 2016
Beneficial Reuse Management (BRM) has introduced GYPSOIL BLENDABLE, a new high-quality pelleted gypsum fertilizer that supplies 17% sulfate sulfur and Read More
StewardshipAgrible Joins Field To Market To Pursue Sustainable Sou…
June 1, 2016
Agrible, Inc. has joined Field to Market: The Alliance for Sustainable Agriculture as an associate member. As a leading multi-stakeholder Read More