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Crop roundup: weed management

Kacey Birchmier 12/06/2013 @ 5:19pm Agronomy & Conservation Editor for Successful Farming and Agriculture.com. I grew up on a fourth-generation farm in central Iowa. Follow me on twitter - @KaceyBirchmier.

BASF releases survey results showing majority of farmers deal with glyphosate-resistant weeds, Dow AgroSciences provides training for the Enlist system, and a new report indicates producers in the Chesapeake Bay have increased conservation measures.

New survey sponsored by BASF shows majority of growers face glyphosate-resistant weeds
Three out of four growers who participated in a recent survey by BASF suspect that glyphosate resistance is a cause of their tough to control weeds. As a result, a 76 percent of these growers have already changed their weed management program to address resistance.

In addition, many growers have experienced lower yields, which they attribute to resistant weeds. These growers have also spent more time scouting and invested more money in their crops due to resistant weeds.
In the survey, growers identified how they plan to change their programs in 2014. More than two-thirds of growers indicated that they would be applying a preemergence herbicide this season and more than half of growers are planning to add an additional herbicide to their existing program. Additionally, 50 percent of growers plan to use more than one site of action and 47 percent said they plan on using overlapping residual herbicides to control resistant weeds.

"These results show that growers are beginning to understand the need for a comprehensive weed management approach," said Greg Armel, Ph.D., Technical Market Manager, BASF. "Growers are realizing the importance of using residual herbicides and multiple, overlapping herbicide sites of action."

The survey also highlighted the weeds that growers found the toughest to control in 2013. Nearly two-thirds of respondents said waterhemp was the most difficult to control, while 54 percent said that ragweed species were the toughest to control. Lambsquater and marestail were also identified as difficult weeds.

To combat these tough weeds, growers are now looking for solutions to meet their specific crop needs.

With half of the herbicide sites of action currently available in the U.S., BASF is a key resource for growers fighting resistant weeds. BASF has 12 different herbicide sites of action with products for all application stages.

To find out more information about the BASF herbicide portfolio, visit the Advanced Weed Control website. The website provides growers with the latest expert information, recommendations and insights on effective weed control, including videos from local agronomists and weed scientists discussing strategies specific to geographies across the Midwest and South.

Industry readies for launch of Enlist system with Enlist 360 field training

This summer, more than 5,000 retailers, seed sellers and growers participated in Enlist 360 field training. The field training provided a learning experience on the components of the Enlist Weed Control System, a new herbicide-tolerant trait technology from Dow AgroSciences. The company continues to focus on training and learning opportunities for the Enlist system as the technology awaits regulatory approvals.

“We want to prepare the industry for the introduction of this new technology so that when it’s available, farmers, retailers and seed sellers can hit the ground running and get the most out of the technology while using it responsibly,” says Damon Palmer, U.S. commercial leader for the Enlist Weed Control System.

Dow AgroSciences is employing a multifaceted approach to education. Enlist field specialists and team members demonstrated how the system will work at regional Dow AgroSciences Technology Centers in Indiana, Iowa, Kansas, Maryland, Minnesota and Tennessee.

Training participants learned about the three components of the Enlist system: Enlist traits, Enlist Duo herbicide with Colex-D Technology, and the Enlist Ahead management resource.

Field demonstrations of Enlist Duo herbicide and on-target application
Drift and volatility demonstrations highlighted how Enlist Duo herbicide with Colex-D Technology — a proprietary blend of new 2,4-D choline and glyphosate — reduces the potential for off-target movement compared with a tank mix of glyphosate and traditional 2,4-D.

At plot locations, attendees were greeted by a display of weeds common to their area. Giant ragweed, lambsquarters, waterhemp and Palmer amaranth stood in a small plot marked untreated. As the participants continued their training, they observed a clean plot that had been treated with a preemergent soil-applied residual herbicide followed by Enlist Duo herbicide.

To ensure the Enlist™ system is a sustainable solution for the long term, Dow AgroSciences will recommend growers incorporate a program approach to their weed control.

“The program approach will include a residual herbicide, such as Sonic herbicide for soybeans or SureStart herbicide for corn, followed by Enlist Duo herbicide,” Palmer says. “This will provide growers with early season residual control of weeds, and it is also a proactive approach to weed resistance management.”

Tolerances demonstrate system sustainability 

Dow AgroSciences representatives pointed to side-by-side corn and soybean plots to highlight the excellent tolerance Enlist crops have to Enlist Duo herbicide.

Looking to provide a sustainable herbicide-tolerant system, Dow AgroSciences has included additional tolerances with the Enlist crops. Enlist corn will also have tolerance to the FOP class of herbicides, including Assure II herbicide. Enlist soybeans, Enlist E3 soybeans and Enlist cotton also will provide tolerance to glufosinate.

Management resource is key

The Enlist Ahead management resource is designed to help growers and applicators succeed while promoting the responsible use of the Enlist system. This includes best management practices associated with the Enlist™ system, such as nozzle selection, tank cleanout and using program approach recommendations.

Using a spray table, Dow AgroSciences presenters demonstrated an array of spray patterns and droplet sizes that different nozzles create. Participants could see how low-drift nozzles that produce a coarse to extremely coarse droplet size in combination with a solution having similar characteristics to Enlist Duo herbicide will deliver the most favorable result for weed control while reducing the potential for off-target movement.

Growers, retailers and seed sellers will have more opportunities to learn about the Enlist system, including in-person and online training sessions, he says.

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