facebook_pixel

A Two Pronged Approach to Weed Resistance Management

Crop Consultant Charles Rogister

Consultant Charles Rogister

Weed resistance, especially to glyphosate, is a real and growing threat to U.S. agriculture. And in North Carolina, this threat is already a stark reality. Per a study published in the Journal of Cotton Science,it is conservatively estimated that glyphosate-resistant Palmer amaranth occurred on at least 185,000 acres in North Carolina in 2008 and infests 22 counties including Pitt, home to Crop Consultant Charles Rogister of Crop Production Services.

Rogister became concerned a few years back when he noticed glyphosate wasn’t providing the level of control it once had on tough weeds like Palmer amaranth. He started researching the issue and consulted with his county extension agent, Sam Uzzell. In 2007, Uzzell invited Alan York, former North Carolina State University William Neal Reynolds Professor of Crop Science and Extension Specialist, to speak at a county grower meeting. York discussed the impact weed resistance was already having on the region and how that impact would escalate unless preventive measures were taken.

“At that meeting, York hit home the fact that we need to take care of the problem now before it gets worse. I think his warnings really opened the eyes of some growers in this area and helped to get the point across that we needed to take action,” said Rogister.

Keys to Success

Rogister stresses to his customers that there are two key components in managing resistance. One of those is alternate mode of action. “Growers need to change up the mode of action, not just the brand,” said Rogister.

The second component to weed management for Rogister is to be timely with herbicide applications. “Resistant or not, if you spray pigweeds that are too large, nothing is going to work like it’s supposed to,” said Rogister. “It is so important to control weeds early, when they are small.”

Pre-emergence, residual herbicides help control weeds early in the season to protect crop yield potential, even in glyphosate-tolerant crops. And, these herbicides provide other modes of action besides glyphosate.

“When weeds are sprayed with a single herbicide mode of action again and again, then those plants that tolerate that herbicide are selected and enrich the following generation with genes that can tolerate the herbicide. Once a weed population develops resistance, they ‘remember’ they are resistant,” said Chuck Foresman, manager of weed resistance strategies for Syngenta Crop Protection, Inc. “Rotating crops and using more than one mode of action for weed control reduces the chances for resistance to develop. And, if a weed is resistant to one mode of action, another mode of action may control it.”

Building a Strategy

Growers need to be prepared to fight glyphosate resistance with the tools they currently have available, according to Foresman. “Unfortunately, some believe that chemical companies are going to develop a new herbicide mode of action to alleviate glyphosate resistance before it becomes a bigger problem,” said Foresman. “But if we found a new mode of action today, it would take at least ten years to get it to market. We need to be looking at the herbicide programs and strategies available today, and make the best use of those tools.”

Rogister evaluated the tools available and developed a weed management strategy that has helped growers in his region combat this issue.

“For cotton, we went with glyphosate and 2,4-D at burndown and then came back with Reflex herbicide broadcasted behind the planter,” said Rogister. “I recommend that everybody broadcast since we have such a problem with these pigweeds. We applied glyphosate and Dual Magnum herbicide in the first over-the-top application.”

Rogister plans to continue these recommendations for the 2009 season based on the successes his customers have had in both controlling resistant weeds and minimizing the spread of resistance. As a true pioneer in the implementation of weed resistance management strategies in eastern North Carolina, Rogister has inspired many growers in the region to take the steps necessary to manage resistance and protect yields.

Topics:

Leave a Reply

Weed Control Stories
Weed Control

Glyphosate-Resistant Johnsongrass Focus of New Webcast

May 22, 2017

A new webcast on effective management of glyphosate-resistant johnsongrass has been added to the Focus on Cotton online series from the Plant Management Network and Cotton Incorporated.

Weed Control

Upgrading Cotton Weed Control Step by Step

May 2, 2017

To control yield-robbing weeds, farmers need a step by step strategy, starting with a clean, weed-free field, followed by timely applications of herbicides with multiple modes of action.

Weed Control

Foliar Auxin Injury Not Good Indicator of Yield Loss

May 1, 2017

According to High Plains cotton and weed specialists, the relationship between injury from auxin herbicides and potential yield loss is difficult – if not impossible – to accurately predict.

Weed Control

Multiple Pre-Emerge Residual Options for Cotton

April 20, 2017

An apparent shortage of Caparol has some cotton growers scrambling to find alternatives for their pre-emergence residual herbicide program.

Weed Control

More Responsibilities with New Cotton Technologies

March 30, 2017

From a cotton farming standpoint, it may be more important now than ever to match your surroundings with your weed control responsibilities.

Weed Control

Hit Right Where You’re Aiming

March 20, 2017

Extension experts say hooded booms like Willmar’s Redball hooded sprayers increase accuracy and minimize drift.

Weed Control

Thoughts on Nozzles Added to XtendiMax Label

February 22, 2017

In his fifth blog on proper stewardship of the new dicamba-based systems, Larry Steckel reviews some of the new nozzle options that have been approved for use with XtendiMax.

Around The Gin
Product News

Transform Earns Section 18 Exemptions for Cotton, Sorghum

May 4, 2017

Transform WG insecticide has received Section 18 emergency use exemptions for use in cotton and sorghum in select states for the 2017 production season.

Product News

EPA Approves Monsanto’s NemaStrike Technology

May 2, 2017

The EPA has issued registration for tioxazafen, a new nematicide from Monsanto that will be branded as NemaStrike Technology for nematode control and yield protection in cotton, corn and soybeans.

Product News

Indigo Partners Launched for In-Field Technology Testing

April 25, 2017

Indigo is launching Indigo Partners, a collaboration of 25 U.S. growers and agronomic experts to test agricultural technologies – including Indigo’s microbial seed treatments – during 2017.

Product News

UPI Adds New Herbicide Products

April 14, 2017

UPI has added two new herbicides to its portfolio of high quality crop protection products for the U.S.

Product News

FiberMax One Ton Club Membership Tops 1,000

April 14, 2017

A record number of growers qualified for the FiberMax One Ton Club in 2016 with four-bale and higher yields with FiberMax varieties.

Product News

Deltapine NPE Program Kicks off Tenth Year

April 10, 2017

Nearly 200 growers will participate in the tenth season of the Deltapine New Product Evaluator (NPE) Program.

Product News

BASF Expands Dicamba Manufacturing Facility

March 22, 2017

BASF has completed a $270 million expansion of its Beaumont, TX, facility – the largest agricultural products facility investment in company history.

Product News

Topguard Terra Label Amendments for Cotton Root Rot in Texas

March 7, 2017

Texas growers now have additional preplant and post planting options for using Topguard Terra to control cotton root rot.

Latest News
Weed Control

Glyphosate-Resistant Johnsongrass Focus of New Webcast

May 22, 2017

A new webcast on effective management of glyphosate-resistant johnsongrass has been added to the Focus on Cotton online series from the Plant Management Network and Cotton Incorporated.

Weed Control

Weed Control Options in Light of Herbicide Shortages

May 9, 2017

Tennessee Extension Weed Specialist Larry Steckel outlines several options for early season cotton weed control in light of shortages of Caporol, Cotoran and Diuron.

Soybeans

Cooperation, Preparation Are Keys to Ag Sustainability

May 5, 2017

Georgia’s Stanley Culpepper outlines the training efforts for auxin herbicides in the state and praises the people who make it all work.

Weed Control

Upgrading Cotton Weed Control Step by Step

May 2, 2017

To control yield-robbing weeds, farmers need a step by step strategy, starting with a clean, weed-free field, followed by timely applications of herbicides with multiple modes of action.

Weed Control

Foliar Auxin Injury Not Good Indicator of Yield Loss

May 1, 2017

According to High Plains cotton and weed specialists, the relationship between injury from auxin herbicides and potential yield loss is difficult – if not impossible – to accurately predict.

Weed Control

Multiple Pre-Emerge Residual Options for Cotton

April 20, 2017

An apparent shortage of Caparol has some cotton growers scrambling to find alternatives for their pre-emergence residual herbicide program.

Weed Control

More Responsibilities with New Cotton Technologies

March 30, 2017

From a cotton farming standpoint, it may be more important now than ever to match your surroundings with your weed control responsibilities.

Weed Control

Hit Right Where You’re Aiming

March 20, 2017

Extension experts say hooded booms like Willmar’s Redball hooded sprayers increase accuracy and minimize drift.

Weed Control

Thoughts on Nozzles Added to XtendiMax Label

February 22, 2017

In his fifth blog on proper stewardship of the new dicamba-based systems, Larry Steckel reviews some of the new nozzle options that have been approved for use with XtendiMax.

Weed Control

Texas Outlines Best Management Practices for New Auxin Herbicides

January 31, 2017

The approval and availability of three new herbicides for use with auxin-tolerant cotton varieties in 2017 means that growers will need a keen understanding of the products and their proper use.

Weed Control

Correct Nozzle Pressures Important in Xtend System

January 31, 2017

In his fourth blog on proper stewardship of the new dicamba products on Xtend crops, Larry Steckel takes a second look at the pressure ranges for optimum nozzle use.

Weed Control

Watch the Wind in Xtend Crop System

January 23, 2017

In his third blog on stewardship of the Xtend Crop System, Larry Steckel turns his attention to the wind – more specifically, wind speed and direction.

Weed Control

Use the Correct Nozzles in the Xtend Crop System

January 17, 2017

Larry Steckel turns his focus to nozzles in his second blog on stewardship of XtendiMax and Engenia on Xtend crops.

Weed Control

Flag the Technology Program Expands in Texas

January 16, 2017

The Texas A&M AgriLife Extension Service and the Texas Plant Protection Association have collaborated on a Flag the Technology program that identifies crop fields sensitive to certain herbicides.

Weed Control

Proper Use of Correct Herbicides in Xtend Crop System

January 16, 2017

Tennessee Extension Weed Specialist Larry Steckel is working to help growers prepare to properly use and manage newly-approved dicamba and 2,4-D herbicide options.