Dicamba-Glyphosate Combo Works Well In Resistant Soybeans

Soybeans engineered to be resistant to the herbicides dicamba and glyphosate performed well in field tests with weeds that have become resistant to glyphosate alone.

Bill Johnson, a Purdue professor of weed science, says dicamba has been known to work well on weeds that appear in soybean fields, but it had to be applied to the ground long before soybeans were planted because the crops also were susceptible to the herbicide. A new dicamba-resistant soybean, which also is resistant to glyphosate, can handle an application after planting, according to Johnson’s findings in the journal Crop Management.

“This is a powerful postemergence herbicide that we can pair with glyphosate to kill glyphosate-resistant weeds,” Johnson says.

More than 90 percent of soybeans and corn planted in the United States are resistant to glyphosate, the active ingredient in the popular herbicide Roundup. Overuse has created glyphosate-resistant weeds that can lower crop yields.

“There has been an overreliance on just using glyphosate in many soybean fields. We have created an environment that has selected for glyphosate-resistant weeds,” Johnson says.

Johnson used field tests from 14 locations in Georgia, Illinois, Indiana, Kentucky, Missouri, Nebraska, North Carolina, Ohio, South Dakota and Tennessee to evaluate dicamba’s effectiveness on broadleaf weeds before and after soybean planting.,

The study showed that dicamba applied just before planting provided 97 percent control of common lambsquarter and horseweed three weeks after treatment, but was slightly less effective on smooth pigweed, giant ragweed, velvetleaf, palmer amaranth, waterhemp and morning glory.

Dicamba treatments postemergence improved control of velvetleaf, smooth pigweed, morning glory and waterhemp. When combined with glyphosate, dicamba gave 30 percent to 65 percent better control over glyphosate-resistant palmer amaranth, waterhemp, horseweed and giant ragweed compared to glyphosate alone.

Johnson said he would continue to study dicamba-glyphosate usage to understand how the combination can be best utilized in different conditions and situations. Monsanto, which donated seeds, partly funded his research.

(Source: Purdue University)

Leave a Reply

One comment on “Dicamba-Glyphosate Combo Works Well In Resistant Soybeans

  1. Here in Bragado ( Argentina ) we are starting to expirience same dificulties in controling same grasses like Johnson grass and a type of rye grass with glyphosate. I know that Dicamba won`t be the solution , but will something come to deal with this problem in the near future. Rigth now , we are using graminicides to control , but this has raised costs very much. Thank you.

Herbicides Stories

HerbicidesScouting Key To Next Season’s Soybean Herbicide Program
August 12, 2014
When growing soybeans, growers need to think ahead to stay one step ahead of weeds. That means examining weed threats and evaluating which herbicides work best. Read More
HerbicidesArysta Touts Burndown Herbicide For Brome Management In Wheat
June 4, 2014
Arysta LifeScience North America recommends PRE-PARE Burndown Herbicide for effective brome management in winter wheat. Read More
HerbicidesFall Herbicide Applications More Effectively Manage Resistant Italian Ryegrass
May 14, 2014
Field studies show that a fall application of certain herbicides before weed emergence, leads to more successful crop planting and weed control in spring. Read More
Waterhemp in soybean stubble
HerbicidesThe Weed Resistance Problem: A Matter Of Billions
April 1, 2014
Not only is the amount of money being spent to control these yield robbers high, but the toll it has taken on the human population is growing lager by the day. Read More

Trending Articles

CropLife 100Agrium To Cut 500 Jobs, Sell Some Businesses
November 11, 2014
Among the businesses Agrium will try to sell are its micronutrients and European UAN (urea-ammonium nitrate) lines. Read More
HerbicidesMonsanto, Sumitomo Chemical And Valent Extend Crop Protection Collaboration
November 10, 2014
The agreement extends their strategic partnership in Monsanto’s Roundup Ready PLUS Crop Management Solutions platform for soybeans and cotton in the U.S. Read More
FertilizerCorn Rootworm Hybrids And Potassium Uptake
November 4, 2014
To achieve successful yields, grower-customers can’t afford to cut back on their potassium use with corn rootworm hybrids, say experts. Read More
StewardshipResponsibleAg Begins Auditor Training
October 31, 2014
ResponsibleAg auditor training is now underway at the Ford B. West Center for Responsible Agriculture in Owensboro, KY. Read More
InsecticidesNew Research Study Shows The Value Of Neonics
October 29, 2014
The study evaluated seed treatment, soil and foliar uses of neonicotinoid insecticides in the U.S. and Canada. Read More
Crop InputsPlatform Specialty Products To Acquire Arysta LifeScience
October 20, 2014
Once the acquisition is complete, Platform Specialty Products will combine Arysta LifeScience with previously acquired companies Agriphar and Chemtura Crop Solutions. Read More

Latest News

EquipmentAGCO Announces Operator Of The Year Finalists
November 20, 2014
Four custom applicators have been selected by AGCO Application Equipment as finalists for 2014 Operator of the Year, an honor that recognizes them as being among the top professionals in their industry throughout North America. Read More
MicronutrientsH.J. Baker Expands Tiger-Sul Business
November 20, 2014
H.J. Baker has created and filled two strategic positions in business development and sales within its Crop Performance Division. Read More
soybean field
FertilizerGeneral Mills Honors United Suppliers For Nitrogen Opti…
November 19, 2014
United Suppliers winning proposal detailed SUSTAIN, a consulting network that provides customized products and services for farmers using a needs-based system approach. Read More
EmployeesOhio AgriBusiness Association Awards $25,000 In Scholar…
November 19, 2014
Each year, the Ohio AgriBusiness Association Educational Trust scholarship program awards scholarship dollars to students enrolled in an agriculture-related field attending several state colleges. Read More
ManagementServi-Tech Names New CEO
November 17, 2014
Servi-Tech has named Greg Ruehle its new president and CEO. Read More
CropLife 100Pinnacle Ag Acquires Colorado Aerial Application Outlet
November 17, 2014
Ft. Lupton, CO-based Reck Aviation — a full-service chemical application company providing aerial crop applications of fertilizers and crop protection products — will operate as part of Pinnacle's AgOne Application Services brand. Read More
Eric SfiligojMcDonald’s Message: Biotech Crops Scarier Than Cancer
November 17, 2014
Despite their potential health benefits, one of the world’s largest potato users will pass on a new biotech offering. Read More
MicronutrientsWinField Releases 2014 NutriSolutions Results
November 14, 2014
A number of significant regional and national crop deficiency trends emerged from the 2014 WinField NutriSolutions tissue sampling program. Read More
FertilizerH.J. Baker Opens Chinese Production Lines
November 14, 2014
The occasion was the official launch of the Tiger-Sul sulphur Bentonite production line of two much anticipated fertilizer products in China, T90CR sulphur fertilizer and TZinc micronutrient enhanced sulphur fertilizer. Read More
ManagementOhio Certified Crop Adviser Program Accepting Nominatio…
November 14, 2014
The award recognizes an individual who delivers exceptional customer service for farmer clients in nutrient management, soil and water management, integrated pest management and crop production in Ohio. Read More
HerbicidesSyngenta Announces Acuron Trial Plot Results
November 14, 2014
Acuron was tested at 167 trial locations across 35 states. Trials included 95 Syngenta locations, 54 university locations and 18 distributor locations. Read More
Crop InputsVerdesian Expands Sales Force
November 13, 2014
The new sales representatives will work with growers, retail partners and distributors to oversee technical training and product education. Read More
EquipmentAGCO Raises $100K For Wounded Warrior Project
November 13, 2014
AGCO Corp. partnered with local AGCO dealers across the U.S. and Canada to raise nearly $100,000 in support of wounded service veterans. Read More
HerbicidesDow AgroSciences Announces Launch Of Enlist Duo Herbici…
November 12, 2014
It will be launched in conjunction with a stewarded introduction of Enlist corn, and seed production of Enlist soybeans in 2015. Read More
FertilizerH.J. Baker Expands Tiger-Sul Business
November 12, 2014
Agricultural firm H.J. Baker has created and filled two strategic positions in business development and sales within its Crop Performance Division. Read More
Blenders13 Fertilizer Blenders For 2015
November 12, 2014
Dealers can find a fertilizer blender to deliver any speed, volume and custom mix they want. Read More
CropLife 100Wilbur-Ellis Vice President Receives Honorary FFA Award
November 11, 2014
Jim Loar, vice president of operations of Wilbur-Ellis’ Agribusiness Division, was awarded the Honorary American FFA Degree at the 2014 National FFA Convention and Expo in Louisville, KY. Read More
FertilizerBASF Makes Limus Nitrogen Management Available In U.S.
November 11, 2014
Reducing ammonia losses by more than 90%, Limus nitrogen management has demonstrated increased crop yields on average of 6%, according to 2013 replicated research. Read More