Key Strategies For Spring Marestail Management

Marestail

Ohio grain farmers are likely to find more glyphosate-resistant marestail in their fields this year because of the wet fall and warm winter, says an Ohio State University Extension weed specialist.

Marestail is the most abundant, herbicide-resistant weed Ohio growers deal with, and according to Mark Loux, a combination of herbicide applications can provide the most consistent, effective control.

Resistant populations were traditionally found in southwestern Ohio, but now essentially all of the marestail statewide is glyphosate-resistant. Twenty-five percent of marestail also is resistant to ALS inhibitors, meaning postemergence herbicide applications are often the least effective, Loux said.

“The situation takes on even more significance this spring as crop growers were hampered from fall applications due to the lack of time and good weather last fall to get herbicide applied,” he said.

Loux offers several approaches growers can take to deal with increasingly difficult weed control scenarios:

  • Apply burndown plus residual herbicides in late March or early April, which is applying early enough that burndown of emerged crops is not an issue.
  • Apply burndown plus residual herbicides in late April or close to planting, which increases the potential for adequate control of late-emerging marestail plants. The disadvantage of waiting this late, especially as applications are delayed into May, is increased variability in the burndown of existing crops.
  • Split the pre-plant application of herbicides with a late March or early April application of glyphosate plus 2,4-D plus a low rate of residual herbicide. Follow that with a second application. at the time of planting. that consists of the majority of the residual herbicide plus whatever additional burndown is needed.

While there is no perfect time for growers to apply herbicide in the spring, what is important is that they get rid of what marestail is present before crops emerge. It’s also important to include herbicides that provide residual control because marestail will typically continue to emerge into June.

“The bottom line here is that there is no one easy approach to marestail management that consistently optimizes both burndown and residual control of marestail,” he said. “Several possible approaches are offered for your consideration here, with the caveat that any of them may work in a field with a low infestation level and the growing season progresses normally.

“But the more complex approach will help ensure control when populations are higher and the growing season less favorable.”

Leave a Reply

Herbicides Stories

Soybean Plant closeup
Crop InputsDow Launching New Soybean Burndown Herbicide
June 30, 2016
With the 2016 growing season nearing the halfway mark, many growers are scouting soybean fields to find unwelcome marestail plants Read More
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
Trending Articles
The Andersons Waterloo
ManagementFirst Indiana Facility Certified Under 4R Nutrient Stewardship Certification Program
June 27, 2016
The 4R Nutrient Stewardship Certification Program has announced that The Andersons, Inc.’s Waterloo, IN, facility has been added to its Read More
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
Latest News
Heritage Cooperative
CropLife 100Heritage, Agland Co-op Explore Mutual Merger Interest
June 30, 2016
According to a report in The Ohio Country Journal, Heritage Cooperative and Agland Co-op have entered into negotiations to consider Read More
Soybean Plant closeup
Crop InputsDow Launching New Soybean Burndown Herbicide
June 30, 2016
With the 2016 growing season nearing the halfway mark, many growers are scouting soybean fields to find unwelcome marestail plants Read More
ManagementUpdates on Glyphosate Use in the EU and Bayer/Monsanto
June 29, 2016
Editors Paul Schrimpf and Eric Sfiligoj discuss the latest important developments on these crop protection fronts. Read More
Industry NewsCompass Minerals Names Protassium+ Sales Director
June 28, 2016
Compass Minerals, the producer of Protassium+ sulfate of potash, has named Scott Johnson director of sales for Protassium+ North America. Read More
Eric SfiligojThe British Leave Vote Impact On EU Agriculture
June 27, 2016
Like virtually everyone else in the world this past week, I’ve watched the global reaction to Britain’s vote to exit Read More
Valent David Nothmann
Crop InputsValent Names David Nothmann Vice President Of Marketing
June 27, 2016
Valent U.S.A. Corp. has announced the appointment of David Nothmann as vice president of marketing. Nothmann will be responsible for Read More
The Andersons Waterloo
ManagementFirst Indiana Facility Certified Under 4R Nutrient Stew…
June 27, 2016
The 4R Nutrient Stewardship Certification Program has announced that The Andersons, Inc.’s Waterloo, IN, facility has been added to its Read More
CropLife 100BRANDT Contributes To Mayo Clinic
June 27, 2016
BRANDT, a leading agriculture retailer and manufacturer of specialty agriculture products, has pledged a sizable donation to the Mayo Clinic Read More
ManagementReport: U.S. Farmland Values On Average Continue Gradua…
June 27, 2016
Land price movement has been in the forefront for farmers, landowners, lenders and land brokers for a decade now during Read More
AdjuvantsPrecision Laboratories Introduces Intact Xtra For Use W…
June 27, 2016
Precision Laboratories announces the launch of Intact Xtra, an adjuvant designed for applicators who want to maximize spray applications and Read More
Key Cooperative’s new liquid fertilizer, crop chemical, and seed facility in Grinnell, IA stores 1.5 million gallons of liquid fertilizer and 120,000 gallons of crop chemicals.
Retail FacilitiesKey Cooperative Facility Features The Latest In Murray …
June 27, 2016
When Key Cooperative wanted to improve the overall efficiency at its new state-of-the-art facility in Grinnell, IA, it turned to Read More
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