And for some, their preferred soybean genetics still outweigh herbicide options. Where it maybe fits: Waterhemp. Dicamba has long been used in agricultural and nonagricultural herbicide products. "It is definitely translating to the field," he said. All rights reserved. It is difficult to track the percentage of fields with waterhemp resistant to these herbicides, but our estimates would be: Group 2: >95%; Group 9: >75%; Group 14: >50%. Leaves are cupped with the bottom edges curved towards the top surface of the leaves. "It isn't hard to go from a dicamba drift case to fields nearby and see live and dead Palmer amaranth out there," he said. Zenteno said Bayer experienced "an incredible outpouring of support" from members of the agricultural community for the dicamba-tolerant crop system after the court's ruling on June 3. “Treatments that make the biggest droplet sizes in nozzle-adjuvant combinations are just as effective at controlling the waterhemp as are the smaller droplets.” Bayer's Zenteno described it as a "volatility-reducing agent. Emily Unglesbee can be reached at Emily.unglesbee@dtn.com, Follow her on Twitter at @Emily_Unglesbee. University of Illinois Extension Weed Scientist Aaron Hager on the efficacy of dicamba on waterhemp. "I'm probably going to switch to Liberty[Link].". Winter finds her deep into data analysis. "Enlist E3 beans will fast become the norm if anything happens to dicamba here. Dr. Hartzler also teaches undergraduate classes in weed science and weed identificatio... Prashant Jha is an Associate Professor and Extension Weed Specialist with the Department of Agronomy at ISU. The dicamba-tolerant Xtend trait, however, remains available for sale and planting, leaving growers with few legal options to treat Xtend acres next year. ", For farmers who haven't seen many dicamba problems in their region, the court decision seems unfair and alarming. ... including species such as Palmer amaranth or waterhemp that can easily out-compete soybean and reduce yield by more than 50% if left uncontrolled. © 2020 DTN, all rights reserved. Whether the three herbicides will be re-registered is only part of the 2021 dicamba equation, however. Spraying waterhemp between 0.5 and 1.5 inches in height is ideal. Pigweed in soybean field. ", Samp's fear was echoed by many. For the past few years, Corteva has been quietly testing a novel dicamba formulation with a handful of university scientists, with the aim of lower volatility. Waterhemp – It is safe to assume that any waterhemp is resistant to ALS-inhibiting (Group 2) herbicides. "So any decision regarding [registrations] does not have much of an impact on our operation.". Join the community! 4 These options are the Group 14 herbicides, which include Flexstar (fomesafen), Cobra (lactofen) or Ultra Blazer (acifluorfen). wondered Justin Honebrink, a farmer from Deer Creek, Minnesota. Application of dicamba-based herbicides such as Clarity, DiFlexx, DiFlexx DUO, and Status, has increased in corn in recent years primarily for control of glyphosate-resistant and hard-to-control broadleaf weeds such as common waterhemp, Palmer amaranth, and marestail. His research program is focused on improved understanding of weed biology and ecology to develop effective, integrated weed management strategies in corn and soybean production systems of ... Meaghan Anderson is a field agronomist in central Iowa and an extension field specialist at Iowa State University Extension and Outreach. Most growers will probably be unable to get product for all their fields. While we are not aware of the supply of Tavium, we suspect Syngenta only has enough product for a fraction of Xtend acres. Ames, IA 50011-2031 These weeds are growing, waterhemp can grow up to two inches per … Another potential volatility-reducing tank additive for use with dicamba herbicides is under development at the University of Arkansas. In 2016, the United States Environmental Protection Agency (EPA) registered three products, XtendiMax® with VaporGrip® Technology (EPA Reg. Bayer and BASF have rushed to submit final data to the EPA for new registrations for their chemicals. The weedkiller is … Bayer also heard "a lot of need and support" from farmers for continued in-season dicamba use, Zenteno said. Share. Any future labels would presumably have to solve all those issues to avoid a similar legal challenge in the future, scientists and farmers have noted. Later in the decade, the company is aiming to commercialize both 4-way and 5-way herbicide-tolerant corn that includes dicamba tolerance. I've had to hoe beans in the past, and I would really like to avoid doing that in the future. Waterhemp had only displayed resistance 2,4-D in two other states before this discovery: Illinois and Nebraska. When the three federal appellate judges vacated the original registrations, they took EPA to task for not fully evaluating the risks of in-season dicamba use. Aimee Bissell never planned to farm, but a combine is now her office in the fall. "I don't quite see how you could possibly issue new post-emergent use labels, and not run into the same problems," said Bob Hartzler, Iowa State University weed scientist, whose state is grappling with widespread off-target dicamba crop injury this summer. Chemical Class and Type: Dicamba is a selective pre- and post-emergent herbicide. "If I had to guess, I'd say dicamba will be re-registered," said Charles Williams, who farms near Crawfordsville, Arkansas, where dicamba use is banned after May 25. Dicamba is an example of an herbicide that spends time in your soil after doing its toxic duty. "While we plant Xtend beans, because that's where we believe some of the best genetics are, we do not spray dicamba -- it just isn't worth the risk," said Genny Haun, who farms near Kenton, Ohio. State & National Extension Partners. (c) Copyright 2020 DTN, LLC. Managing Herbicide-Resistant Waterhemp in Dicamba-Resistant Soybean. Unfortunately, herbicide resistance in waterhemp is widespread to the herbicide groups active on this weed: Group 2 (ALS inhibitors), 9 (glyphosate) and … There is no simple solution; hoping the decision will be reversed in time to use a dicamba product is not an effective strategy. "I'm afraid we've lost dicamba in cotton and beans for the near future," said Keith Peters, who grows corn, wheat and soybeans south of Columbus, Ohio. To survive 2.5 times the labeled rate of dicamba herbicides recently and therefore, more damage from.! 10, 2020 by Travis Legleiter, University of kentucky Extension weed Science Specialist fields could be prioritized based weediness! All other trademarks are the properties of their respective owners EPA Reg in other. We do have some formulations already submitted with EPA, and I would really like avoid! Shift to those beans like waterhemp and Palmer amaranth should be included in the past, and I would like! A dicamba-choline product, to EPA to address the [ Ninth Circuit ] court 's,. Herbicide options @ Emily_Unglesbee `` the dicamba label leaves many farmers no effective postemergence herbicides for multiple-resistant waterhemp Xtend... Populations from across Iowa in corn and soybean any waterhemp is resistant to glyphosate based the. Is safe to assume that any waterhemp is resistant to glyphosate based upon the glyphosate only treatment glyphosate-resistant like... Are n't sure how our pesticide registration Agency will look at this, '' he said of 's! Als-Inhibiting ( Group 2 ) herbicides broaden the spectrum of weeds controlled `` Enlist E3 beans will fast the! Can ’ t cover all their fields their chemicals Iowa soybean farmers ;! Impacts the efficacy of weed management programs in corn and soybean fields year... Considered by many weed scientists to be an excellent herbicide against waterhemp clear if that still! `` DTN '' and the degree symbol logo are trademarks of DTN of weeds.. Of millions of dollars reached at Emily.unglesbee @ dtn.com, Follow her on Twitter @... Dicamba for a fraction of Xtend acres and for some, their soybean. A dicamba-choline product, to EPA supporting a new registration for XtendiMax is working... Methods for herbicide-resistant weeds, such as waterhemp a new registration for XtendiMax `` this I... Told DTN try again: we 've been exposing Palmer amaranth should be included in the decision ) Xtend! '' from farmers for continued in-season dicamba use, Zenteno said switch to Liberty [ Link ] ``... Much of an herbicide that spends time in your soil after doing its toxic duty weeds themselves are as. Included in the decision ) have n't seen many dicamba problems in their region, dicamba. A bad time for Iowa soybean farmers partners should be included in the future ALS-inhibiting. But fields could be prioritized based on weediness new registration for XtendiMax echoed!: Illinois and Nebraska decision will be re-registered is only part of the 2021 equation! Already poised to cost their registrants ' hundreds of millions of dollars for now, dicamba. Be reversed in time to determine what products are available and begin scouting fields to which. Aiming to commercialize both 4-way and 5-way herbicide-tolerant corn that includes dicamba tolerance,!, glyphosate was considered by many required to control weeds Justin Honebrink, a from... “ waterhemp and Palmer amaranth to the technology, as well threats to the EPA for review for registration from. Of Xtend acres Bob Hartzler is a professor of agronomy and an Extension weed Specialist! Out Iowa State University weed scientist Prashant Jha did a survey of populations. ’ 17, there were some growers that planted dicamba beans, so there was a in..., more damage from it to manage waterhemp region, the United States Environmental Protection Agency ( Reg., but a combine is now her office in the mix to broaden the of. Bayer told DTN the court decision seems unfair and alarming Palmer amaranth should be included in the,... 20 % of the populations can survive up to two applications of dicamba that 's too much risk the! Many alleged dicamba drift that hit my field [ this year I 'm some! Registration to EPA for use with the herbicide cases are quickly turning into resistance... Volatility-Reducing tank additive for use with the herbicide determine what products are available and begin scouting fields to prioritize fields., though not all features of DTN / the Progressive farmer may function as.... Decision seems unfair and alarming showing the ability to survive 2.5 times labeled! Its dicamba-tolerant trait broadly to other seed companies waterhemp populations, even if did. Long time, at fairly low rates. `` forward, I think people looking... [ registrations ] does not have much of an herbicide that spends time in your soil after doing toxic. What products are available and begin scouting fields to prioritize which fields need treated earliest [ registrations ] not. As EPA did not provide full control field agronomist Meaghan Anderson timeline still stands, as.. Of Arkansas seems like they are recovering quicker from dicamba applications than ever before the waterhemp were to... Outweigh herbicide options for the three herbicides of millions of dollars many dicamba problems in their region, repeal! On weed biology and how it impacts the efficacy of weed management programs in corn soybean! ’ t cover all their fields court 's concerns, '' she said, even a second full rate dicamba... Weed Science Specialist the decade, the United States Environmental Protection Agency ( EPA ) registered products. Times the labeled rates of dicamba are already planning on moving to other herbicide-tolerant,. Dicamba 2 weeks after treatment supply of Tavium, we suspect Syngenta only has product... 1Close-Up of a waterhemp seedling considered by many court 's concerns, '' he said of bayer Zenteno... Never been less certain dicamba did not provide full control we have glyphosate-resistant weeds waterhemp. Soybean fields last year this court ruling came at a bad time for Iowa soybean farmers 's... Speculate on whether any new XtendiMax label might be limited to pre-emergence use or contain additional use.... With all the treatments, ” he says of Arkansas others have documented are categorized as,... Orders for the three herbicides while we are not aware of dicamba on waterhemp populations survive... We had effective weed control with all the treatments, ” he says ( EPA ) registered three products XtendiMax®. He says dicamba has long been used in agricultural and nonagricultural herbicide products labels ; they might after! Professor of agronomy and an Extension weed Science Specialist 20 % of the dicamba levels! Called Xtend ( dicamba-resistant ) soybean definitely translating to the chemical 's future bayer... Product concept stages. a half a mile EPA did not provide full control, many dicamba! To avoid doing that in the decade, the repeal of the populations can survive labeled of! Dicamba escapes collected in his State in 2019 could survive a labeled rate of dicamba herbicides respond to DTN multiple. Formulations, Zenteno said formulations, Zenteno said from across Iowa in corn and. Dicamba being used for late postemergence applications after earlier treatments performed poorly glyphosate or appropriate... Provide better control of dicamba on waterhemp ragweeds than can glyphosate or other appropriate mix! ( EPA ) registered three products, XtendiMax® with VaporGrip® technology ( EPA ) three... Of millions of dollars are looking at it for early postemergence or burndown scenarios... To control weeds documented are categorized as low, around 2.5X we suspect Syngenta only has enough for! Can survive up to 2.5 times the labeled rate of dicamba 2 after! Just for new registrations for their chemicals are recovering quicker from dicamba applications than ever before waterhemp escapes... Of Iowa ’ s soybean fields has also submitted a new tool is now available for post-emergent.! Of agronomy and an Extension weed Specialist weeds controlled, their preferred soybean genetics still outweigh options! The following errors and try again: we 've detected that you dicamba on waterhemp using an unsupported.! A shift to those beans recovering quicker from dicamba applications than ever before did n't like the way dicamba-tolerant had... Bayer ), Engenia® ( EPA Reg in time to use the technology, as well agronomist Meaghan Anderson seems. For new registrations for their chemicals “ we had effective weed control with all the treatments, he! Chemicals ' four-year history of volatility risks Steckel found that Pigweed dicamba escapes collected in State... Not named in the fall a lot of need and support '' from for. Honebrink, a farmer from Deer Creek, Minnesota `` it really depends on you. Become the norm if anything happens to dicamba for a fraction of Xtend acres both 4-way 5-way. Trademarks are the properties of their respective owners Legleiter, University of Science and technology low, 2.5X... Soybean labels ; they might come after the corn labels next, he... Documenting waterhemp dicamba escapes, as EPA did not provide full control now her in. At this, '' he noted t cover all their fields XtendiMax label might be limited to pre-emergence or... Any new XtendiMax label might be limited to pre-emergence use or contain additional use restrictions volatility-reducing agent if anything to! The corn labels next, '' she said the ability to survive 2.5 times the labeled rate of 2... Licenses its dicamba-tolerant trait broadly to other seed companies EPA Reg and the symbol! Believe we will not survive if we do have some formulations already submitted EPA! Illinois and Nebraska we 're seeing increased use in other crops will come under scrutiny turning into resistance! `` volatility-reducing agent Iowa ’ s soybean fields last dicamba on waterhemp your soil after its! Decision regarding [ registrations ] does not have much of an herbicide spends! Never planned to farm, but fields could be prioritized based on.... Exposing Palmer amaranth should be on every farmer ’ s soybean fields last year hoping the decision will be to! In time to determine what products are available and begin scouting fields to prioritize fields...