Tag Archives: Guest Column

Are your customers applying the right nitrogen rate?

Eric Scherder

Eric Scherder,
Customer Technical Specialist – Western Region, 
Dow AgroSciences

A combination of three nitrogen tests is a powerful decision-making tool for farmers when evaluating nitrogen fertilizer needs. The tests provide accurate estimates of available nitrogen at various times during the season.

Each test provides farmers with the best information for making nitrogen management and application decisions. Whether farmers are applying nitrogen in fall, early spring or split, the tests help farmers manage nitrogen based on science and laboratory results instead of guesswork.

Dow AgroSciences, along with fertility experts at Iowa State University, recommend farmers employ a combination of late-fall, early spring and late-spring (pre-sidedress) soil testing. It is important to use all three tests in combination by sampling at various locations in a field to get an accurate reflection of nitrogen availability and future needs.

The three tests are:
Preplant soil nitrate test — A preplant soil nitrate test measures the amount of residual or carryover nitrate-nitrogen in the soil profile, typically sampled to a 2- to 3-foot depth in the fall or early spring. The preplant test measures the amount of nitrogen remaining from the previous crop year.

Pre-sidedress soil nitrate test — If nitrogen applications are lowered based on soil profile nitrate-N sample results, farmers should complete a pre-sidedress soil nitrate test. This test allows farmers to adjust nitrogen applications before peak growth at critical nutrient uptake stages.

Fall stalk nitrate test — After harvest, a fall stalk nitrate test provides information on the relative nitrogen program results that year. Taking fall stalk nitrate tests over a period of years can help farmers fine-tune nitrogen management. Test results are not simply to be used to adjust rate for the next year, rather longer-term evaluation.

Protect your nitrogen investment
Using a nitrogen stabilizer such as N-Serve® or Instinct® has long proven effective in reducing nitrogen loss into groundwater and surface water.

N-Serve and Instinct protect applied nitrogen by keeping nitrogen in the ammonium form longer by inhibiting the conversion process to nitrate nitrogen, which is moveable in the soil. Both products slow down the conversion so your nitrogen fertilizer investment is available when the corn plant actually needs the nitrogen later in the corn plant life cycle. Stabilizers ensure that applied nitrogen will still be there in the soil profile where a corn plant needs it and won’t end up moving lower in the soil profile out of a corn plant’s reach.

There’s no arguing that nitrogen stabilized with N-Serve and Instinct can increase yield potential. Ultimately, using a stabilizer is going to help make farmers more profitable while also being a sound approach to protect precious groundwater supplies.

To calculate your customers’ return when using Instinct or N-Serve, use the profit calculator at NitrogenMaximizers.com.

Advantages of using N-Serve® nitrogen stabilizer are clearly evident in this side-by-side comparison. Rows on the left, where N-Serve was applied, are taller, greener and healthier while rows on the right appear stunted, yellow and show firing of lower leaves — all symptoms of nitrogen deficiency.

®Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. Instinct is not registered for sale or use in all states. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Do not fall-apply anhydrous ammonia south of Highway 16 in the state of Illinois. Always read and follow label directions. ©2017 Dow AgroSciences LLC

Enlist Duo® herbicide as a burndown inspires trust, confidence

Scott Wright

Scott Wright
Enlist field specialist
Dow AgroSciences

As with any new product, some farmers are asking questions about how Enlist Duo® herbicide works and how to use it. Several farmers in 2017 got their first experience with this technology by using it as a burndown. They found Enlist Duo was effective and gained confidence in the herbicide.

John Lindamood of Tennessee was one farmer who was interested in the system, so he purchased Enlist Duo herbicide for use in burndown. He was able to control tough weeds while they were still small. In particular, annual bluegrass was “thick as a blanket.”

Enlist Duo did a fantastic job controlling weeds in Lindamood’s field, including the pesky annual bluegrass. Now, he is very comfortable with the performance and handling of Enlist Duo, and he plans to use it postemergence on Enlist™ crops.

Farmers in other areas had similar experiences. Tyler Tietjen was among several southeastern Nebraska farmers who applied Enlist Duo as a burndown this spring. It was everything he expected.

“I want clean fields when I start,” Tietjen says. “I expect the field to be 100 percent clean. Enlist Duo got everything. The field was clean after burndown.” Tietjen says the technology works as well as he had hoped.

Enlist Duo herbicide contains two modes of action: new 2,4-D choline and glyphosate. In addition to burndown applications, it is federally registered for postemergence use on Enlist corn, Enlist soybeans and Enlist cotton in 34 states.

Many farmers have been hearing good things about the Enlist weed control system, and they gain confidence once they experience it. Seeing really is believing.

®™DOW Diamond, Enlist and Enlist Duo are trademarks of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. Enlist Duo herbicide is not registered for sale or use in all states or counties. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your area. Enlist herbicides are the only 2,4-D products authorized for use in Enlist crops. Always read and follow label directions. ©2017 Dow AgroSciences LLC

A weed-free field leads to higher yield potential at harvest

Lyndsie Kaehler

Lyndsie Kaehler
U.S. corn herbicides product manager
Dow AgroSciences

September is a time for reflection as the growing season ends and you and your customers spend countless hours in the field for harvest. If your customers found themselves chasing weeds this season, now is the time to consider adjustments to next season’s weed control program.

If weeds are left to grow with, or ahead of, corn at the beginning of the season, yield potential is already decreasing. Research from Iowa State University has shown that the most competitive weeds in corn are about 3 to 4 inches tall at the V3-V4 corn growth stage, and these weeds can reduce yield by about 3 bu./A for every day they are left uncontrolled. From planting until canopy closure, it’s critical to keep fields weed-free so corn can grow without being robbed of sunlight, water and nutrients.

Across the Corn Belt, grass and broadleaf weed control continues to be a high priority. Many weeds, including waterhemp, giant ragweed, foxtail, Palmer amaranth and velvetleaf, continue to spread and develop resistance to multiple herbicides. To combat resistant weeds in cornfields, Dow AgroSciences is proud to offer multiple residual herbicide solutions with versatility and multiple modes of action to control weeds several ways.

SureStart® II herbicide and Resicore® herbicide can be used together in a program approach or separately to meet your customers’ agronomic needs. SureStart II is a proven performer applied preemergence, or at planting, and can be followed by Resicore early postemergence. This program approach provides four modes of action to control your customers’ weeds in corn, including herbicide-resistant species. Plus, farmers can add atrazine and glyphosate to the program for six unique modes of action.

As combines move through fields this fall, remind your customers that a residual herbicide with multiple modes of action can give corn a clean start against their worst weeds next season. Visit PowerOverWeeds.com or contact your Dow AgroSciences sales representative to plan a weed control program for 2018.

Clean corn rows in Illinois after a preemergence application of 2 pt. SureStart® II herbicide followed by 1.25 qt. Resicore® herbicide postemergence.

®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. Resicore and SureStart II are not registered for sale or use in all states. Resicore and SureStart II are not available for sale, distribution or use in Nassau and Suffolk counties in the state of New York. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Always read and follow label directions. ©2017 Dow AgroSciences LLC

More farmers learning benefits of Enlist™ soybeans this summer

Jonathan Siebert

Jonathan Siebert
Enlist field sales leader
Dow AgroSciences

A mild winter and a wet spring may be providing weeds an ideal opportunity to get established early this growing season. These conditions also may be giving some farmers an ideal opportunity to learn about Enlist Duo® herbicide in their own fields.

This summer, seed production growers are raising Enlist soybeans under the Dow AgroSciences Field Forward program. They’re getting a first-hand look at this novel weed control technology before it is commercially available.

Like other farmers who’ve planted Enlist soybeans, they’re anticipating excellent control of even the toughest weeds. You can follow some of these soybean producers throughout the growing season on Experiencing Enlist as they apply Enlist Duo herbicide in their fields and share their experiences with this new technology.

Enlist Duo is a proprietary blend of glyphosate and 2,4-D choline. It provides excellent postemergence weed control in Enlist crops: soybeans, corn and cotton. Dow AgroSciences is prepared to launch Enlist soybeans once necessary import approvals are obtained.

Visit Experiencing Enlist to see what farmers are saying about the new technology. These timely reports will help you and your customers learn more about the Enlist weed control system. Also check out our YouTube channel or follow us on Twitter at @EnlistOnline.

Enlist soybeans

Farmers from around the Midwest are growing Enlist soybeans for seed production under the Field Forward program. See their stories on Experiencing Enlist throughout the growing season.

®™DOW Diamond, Colex-D, Enlist, Enlist Duo and the Enlist Logo are trademarks of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. Enlist Duo herbicide is not registered for sale or use in all states or counties. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your area. Always read and follow label directions. ©2017 Dow AgroSciences LLC 

Stacked herbicide resistance progresses across Midwest

Dave Ruen
Field Scientist
Dow AgroSciences

For nearly two decades, herbicide-resistant weeds have swept across the Midwest. Today, more fields than ever are facing weeds with resistance to multiple modes of action. With new postemergence technologies entering the market, farmers need to remain vigilant and avoid repetitive use of one active ingredient by using residual herbicides in a program approach to control their tough weeds multiple ways.

We’re trying to manage the expansion of glyphosate-resistant weeds — marestail, waterhemp and giant ragweed, for example. There’s no question in my mind that we’ve slowed the advance of glyphosate resistance due to the resurgent use of soil-applied herbicides, such as Sonic® herbicide in soybeans.

Some weeds, such as tall waterhemp, are developing resistance to multiple modes of action, an issue farmers must keep their eyes on.

In Kansas, some tall waterhemp plants are now resistant to HPPD inhibitors, ALS inhibitors and atrazine. Meanwhile in Illinois, tall waterhemp is documented with multiple resistance to PPO inhibitors, ALS inhibitors and atrazine.

In the last few years, we’ve seen a slow expansion of herbicide-resistant weeds, particularly in the upper Midwest. It’s important that we continue to increase the use of residual herbicides and not skimp on rates.

To stop weeds from robbing yield, carefully scout soybean fields and use a targeted program approach this season. Start with a clean field by applying a broad-spectrum, preemergence herbicide that has powerful activity on the Amaranthus species, including pigweeds, waterhemps, and Palmer and Powell amaranth. With two nonglyphosate modes of action, Sonic herbicide is proven to provide 94 percent control of waterhemp and 93 percent control of Palmer amaranth.

For more information about how your customers can take control of herbicide-resistant weeds in their soybean fields, visit OperationCleanFields.com.

®Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. Sonic is not registered for sale or use in all states. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Always read and follow label directions. ©2017 Dow AgroSciences LLC

Get power to do more in your community

Lyndsie Kaehler
Corn Herbicides
Product Manager
Dow AgroSciences

When farmers achieve power over weeds with Resicore® herbicide, they spend less time worrying about yield-robbing waterhemp, marestail or ragweed and have the power to do more. That’s why Resicore is sponsoring a contest to give farmers the chance to visit their dream sports field and $10,000 to donate to a local sports field or community space. Three farmers will win!

Entering is easy — all your customers need to do is submit a photo that demonstrates the power on their farm and answer a few simple questions at PowerToDoMore.com by March 12, 2017. The photo might include their fields, family, friends, pets, equipment, livestock or whatever else represents power to the farmer.

If one of your customers is a winner, you, as the retailer, will win a $500 gift card. All you need to do is encourage your customers to enter.

Powerful performance in 2016 field trials

In 2016 Dow AgroSciences field trials across the Midwest, Resicore herbicide provided excellent control of the toughest weeds found in corn, such as lambsquarters, common ragweed, giant foxtail, glyphosate-resistant waterhemp and glyphosate-resistant Palmer amaranth. Seven to nine weeks after application, Resicore controlled 100 percent of lambsquarters, common ragweed and giant foxtail, plus 96 percent control of waterhemp. When tank-mixed with atrazine, Resicore controlled 93 percent of Palmer amaranth and increased waterhemp control to 99 percent.

With three unique modes of action, Resicore® herbicide controls more than 70 broadleaf weeds and grasses, including herbicide-resistant species. Resicore is powerful enough to be sprayed alone and it can also be tank-mixed with atrazine, glyphosate and other corn herbicides.

To learn more about how your customers can use Resicore to control tough weeds this season, visit PowerOverWeeds.com.

®Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. Resicore is not registered for sale or use in all states. Resicore is not available for sale, distribution or use in Nassau and Suffolk counties in the state of New York. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Always read and follow label directions. ©2017 Dow AgroSciences LLC

Helping growers choose effective herbicides that stay on target

Haley Nabors,Enlist field specialistDow AgroSciences

Haley Nabors
Enlist field specialist
Dow AgroSciences

Growers are anticipating new postemergence herbicide options for troublesome weeds. It may seem difficult to understand which technologies provide which benefits. The Enlist weed control system is designed to offer excellent weed control along with other advantages.

The Enlist system allows growers to use Enlist Duo® herbicide featuring Colex-D® technology in corn and soybeans. This technology is the real difference-maker for this landmark formulation. Colex-D technology enables growers to control weeds with less concern about drift and volatility than other potential solutions.

Enlist Duo is a combination of new 2,4-D choline and glyphosate, providing two valuable modes of action and four key benefits:

  • Minimized potential for physical drift: Compared with a tank mix of traditional 2,4-D and glyphosate, Enlist Duo herbicide with Colex-D technology reduces physical drift by up to 90 percent when applied with a low-drift nozzle.
  • Near-zero volatility: With new 2,4-D choline, volatility is reduced by 96 percent compared with 2,4-D ester.
  • Low odor: Users report there’s very little odor, a definite improvement on traditional 2,4-D formulations.
  • Improved handling characteristics: No salting out in the tank and better cold temperature stability for winter storage. And tank cleanout is simple: Growers can rinse with water — 10 percent of the sprayer volume — when moving to glyphosate-tolerant corn. For all other crops, all that’s required is a triple rinse with water.

Enlist Duo works in the real world. For instance, the label features manageable buffer requirements. There is no field separation needed when applying Enlist Duo next to fields with corn or soybeans that do not contain the Enlist trait. The registered label for Enlist Duo® herbicide includes a 30-foot downwind buffer for sensitive areas.

We continue to have a grower-friendly federal label, registered by the Environmental Protection Agency for use on Enlist corn and soybeans, which makes Enlist Duo an easier-to-use herbicide for growers. We’ve seen that when growers experience the weed control, ease of use and lack of off-target movement, they prefer the Enlist system.

Enlist Duo offers valuable flexibility. Growers can choose from 23 approved nozzles for application. In addition, there are nearly 140 tank-mix products available for use with Enlist Duo.

Retailers can provide additional benefits to customers by understanding these advantages and helping growers make decisions that will control tough weeds and preserve peace of mind in these days when herbicide movement is creating increasing concern.

Visit Enlist.com to learn more about the technology in the Enlist weed control system, including Enlist traits and Enlist Duo herbicide with Colex-D technology. You also can visit our YouTube channel or follow us on Twitter at @Enlist Online.

Enlist Duo® herbicide with Colex-D® technology delivers a 90 percent reduction in drift potential when applied with approved low-drift nozzles.

Enlist Duo® herbicide with Colex-D® technology delivers a 90 percent reduction in drift potential when applied with approved low-drift nozzles.

®™DOW Diamond, Colex-D, Enlist, Enlist Duo and the Enlist Logos are trademarks of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. Enlist Duo is not registered for sale or use in all states. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Always read and follow label directions. ©2016 Dow AgroSciences LLC