Tips for finding the right corn herbicide program for your customers

By: Lyndsie Kaehler, U.S. Corn Herbicides Product Manager, Corteva Agriscience, Agriculture Division of DowDuPont   

Lyndsie KaehlerWinter is an opportunity to reflect and make plans for the upcoming season. Since every farmer, field and season is different, retailers are challenged to develop customized weed control programs to fit customers’ unique needs each year. As you create 2019 corn herbicide plans, here are three key areas to consider.

Attack weeds early and often.
Give your customers’ corn the strongest start possible by layering residual herbicides to control tough weeds. Uncontrolled weeds steal crucial nutrients, sun and water from young corn plants and ultimately, rob yield. Some of the fiercest weed competition, such as marestail, waterhemp and Palmer amaranth, have long germination periods and spread to more fields each year.

Start with a preemergence herbicide to control early weed flushes. Then, come back with a postemergence residual herbicide to control weed escapes and prevent competition from later-emerging weeds.

Recommend corn herbicides with ultimate dependability.
The corn herbicides portfolio of Corteva Agriscience, Agriculture Division of DowDuPont, is designed to fit the way farmers grow corn, so they can spend less time worrying about unwanted, yield-robbing weeds. Our corn herbicides offer dependability and application flexibility to deal with the unexpected. Here is a quick look at how each product can help your customers:

  • Resicore® herbicide is effective, with versatile application timing and residual control lasting deep into the growing season.
  • SureStart® II herbicide is proven to control weeds when it matters most — during the early developmental stages of corn growth.
  • DuPont Realm® Q herbicide is a great postemergence option with multiple modes of action and built-in safener technology that can be applied under diverse weather conditions.
  • Keystone® NXT herbicide is consistent, providing a wide spectrum of weed control, and only requires ¼ inch of rain to activate.
  • DuPont Cinch® ATZ herbicide delivers peace of mind and flexibility through early weed control, especially for farmers needing rotational flexibility.

Offer new savings for your customers
These corn herbicides are part of the all-new, rebate-free TruChoice® offer. You can register at truchoiceonline.com to learn about two ways to offer farmers upfront savings on their crop protection and qualified seed purchases. It can help build your business while improving customers’ cash flow. 

We look forward to working with you this season. Talk with your territory manager from Corteva Agriscience about finding the right corn herbicide for your needs.


About the author: Lyndsie Kaehler is the corn herbicides product manager at Corteva Agriscience
, Agriculture Division of DowDuPont. Lyndsie joined Corteva Agriscience, formerly known as Dow AgroSciences, in 2012 and is based in Indianapolis.

™®Trademarks of Dow AgroSciences, DuPont or Pioneer, and their affiliated companies or their respective owners. Cinch ATZ and Keystone NXT are Restricted Use Pesticides. Keystone NXT is not available for sale, distribution or use in all states. Resicore and SureStart II are not registered for sale or use in all states. Keystone NXT, Resicore and SureStart II are not registered 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. ©2019 Dow AgroSciences LLC

Successful Weed Control Makes Future Use of Enlist™ Corn a Sure Thing

For Todd Lay, the decision whether to continue using Mycogen® hybrids with the Enlist trait has already been made. The performance of Enlist Duo® herbicide with Enlist corn this summer has convinced him to try the technology again.

“The weed control was excellent,” Lay says. “We controlled our Palmer amaranth and waterhemp.”

Lay raises corn, soybeans and alfalfa, with nearly all his acres under irrigation. He uses a combination of ridge tillage and vertical tillage, planting on the ridges. Weed control has been a challenge for the Glenvil, Nebraska, farmer.

This year, he started out with Resicore® corn herbicide, which offers residual activity. He followed postemergence with Enlist Duo® herbicide and says he didn’t have to use anything else this year.

“We’ve had some isolated areas with weed issues,” he reports. “This year it’s clean. There are no weeds there.”

High yields, happy ending
It’s been a good year for corn and soybean yield for Lay. His corn was about 10-15 bushels above average. He says the Enlist hybrids are yielding as good as or better than his other hybrids.

Just as important, he says Enlist Duo stayed on target during application and didn’t volatilize afterward.

“Some of my soybeans were burned by drift this year,” Lay says. “I don’t want herbicides I use to drift into other fields. I think Enlist Duo is a better option for me than other new herbicides.”

Burndown sets the stage

“We did a burndown with Resicore and glyphosate to start off clean,” Lay says. “I applied Enlist Duo postemergence. The application was excellent. It was easy to apply. I saw no drift or volatility.

“It wasn’t that hard to find time to spray according to the label direction,” Lay says. “We sprayed some near a neighbor’s conventional soybeans and some near our own soybeans. We saw no issues with ours and had no complaints from the neighbor.”

Some of his irrigation pivots are half corn, half soybeans. Even conventional soybeans right next to Enlist hybrids were unaffected.

“Enlist Duo doesn’t seem to have the volatility we have with other products,” Lay says. “Tank cleanout is easy, too. We just triple rinse, which is what we always do.”

Success breeds belief
Lay’s experience has convinced him the Enlist weed control system has a place on his farm.

“I’ve already ordered more Enlist corn for 2019,” he says. “Some people around here planted it so they could use DuPont Assure II herbicide to control volunteer corn.”

He talks with other area farmers and will tell them about the use of Enlist Duo herbicide in his fields. His message: “It works. It doesn’t drift. It’s as simple as that.”

Visit ExperiencingEnlist.com to learn more about the experiences of Lay and other farmers who’ve used the Enlist weed control system. For more information, go to the YouTube channel and follow on Twitter at @EnlistOnline.

Todd Lay

Todd Lay of Glenvil, Nebraska, got excellent control of his most troublesome weeds with a program that included Enlist Duo® herbicide.

™®Trademarks of Dow AgroSciences, DuPont or Pioneer, and their affiliated companies or their respective owners. Enlist Duo and Enlist One herbicides are 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 Duo and Enlist One are the only 2,4-D products authorized for use with Enlist crops. Consult Enlist herbicide labels for weed species controlled. Always read and follow label directions. ©2019 Dow AgroSciences LLC

Be inspired by the Power to Do More winners

The Power to Do More contest recognizes worthy farmers not only for what they produce in their fields but also for their exceptional commitment to the communities in which they farm. Farmers often spend as much time and effort working with local organizations as they do ensuring their cornfields stay clean through harvest.

In 2018 we asked farmers to submit photos that embody what gives them the power to do more on their farms. Online voting determined the top three winners, who each saw donations made to their nonprofit of choice from the corn herbicides portfolio of Corteva Agriscience, Agriculture Division of DowDuPont.

These inspiring documentaries show how these three families have the power to do more — in their fields and in their communities. Click the links below to meet the Schroeders from Iowa, the Krauses from Minnesota and the Gutterys from Kansas.

Corteva Agriscience is proud to showcase these winners and to support all American farmers with a lineup of corn herbicides dedicated to delivering the power to do more every season:
Resicore® herbicideSureStart® II herbicideDuPont Realm® Q herbicideDuPont Cinch® ATZ herbicide and Keystone® NXT herbicide.

™®Trademarks of Dow AgroSciences, DuPont or Pioneer, and their affiliated companies or their respective owners. Cinch ATZ and Keystone NXT are Restricted Use Pesticides. Keystone NXT is not available for sale, distribution or use in all states. Resicore and SureStart II are not registered for sale or use in all states. Keystone NXT, Resicore and SureStart II are not registered 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. ©2019 Dow AgroSciences LLC

Timely Residual and Enlist™ Herbicide Applications Foil Weeds

They say timing is everything. When it comes to weed control, that’s close to the truth. Timing certainly is important.

Farmers who put together a successful weed control program need to make timely herbicide applications from before planting through their postemergence applications. Retailers can help their customers make plans that allow for these timely applications.

Into the field earlier
Changes in planting dates may require changes in traditional herbicide application dates, says Shawna Hubbard, Product Manager for Corteva Agriscience, Agriculture Division of DowDuPont.

“As we plant earlier and earlier, farmers need to adjust their herbicide applications,” Hubbard says. Any operation applying growth regulators – such as glyphosate, 2,4-D or dicamba – early in the year needs to ensure the temperatures are warm enough that weeds are actually growing. If they’re not actively growing, these herbicides will be less effective.

“We also need to get residual herbicides on before weeds can gain a foothold,” Hubbard says. “Because we’re applying residuals earlier, we may need to consider using higher rates: We’re often asking them to control weeds an extra two, three or four weeks before we apply postemergence treatments.”

Weeds dictate application timing
Timing is critical for postemergence applications as well. Hubbard suggests applicators base treatments on the size of the weeds, not the calendar.

“It’s better to go a little earlier than you traditionally would,” she says. “For instance, with Enlist One or Enlist Duo herbicides, we should be applying when weeds are no more than 4 to 6 inches tall. If you’re worried about a second flush of weeds after your postemergence application, you have a couple of solutions.”

Adding a qualified residual herbicide to your postemergence tank mix can extend protection. Qualified herbicides for tank-mixing with Enlist One and Enlist Duo® herbicides are listed at EnlistTankMix.com. In addition, if farmers apply postemergence herbicides a bit early, they can always come back with another round of an Enlist herbicide or glufosinate over Enlist cotton or Enlist soybeans.

“Don’t wait for late flushes of weeds to make your first postemergence application,” Hubbard says. “Weather could delay that application and put a lot of pressure on your residuals to hold the fort.”

Spring delays in 2018 meant some growers never got a residual down. That, in turn, required early postemergence applications. Wet field conditions meant some of these applications couldn’t be made until weeds were considerably larger than ideal for complete control.

Time to start planning
For 2019, Hubbard cites four goals that can help make a weed control program more successful:

  • Start with a clean field at planting.
  • Use residual herbicides that feature more than a single mode of action.
  • Make timely applications of postemergence herbicides. For Enlist herbicides, this means spraying before weeds reach 4 to 6 inches.
  • Add an appropriate residual herbicide to your postemergence product to extend the efficacy of this application.

Farmers who keep weeds under wraps all season long reap benefits in the fall. A weed-free field at harvest not only makes it easier to combine the crop but also limits the spread of weed seed.

Find out more by talking to a Corteva Agriscience field rep, by going to Enlist.com or by using the Enlist Ahead resource. Also check out the YouTube channel or Twitter at @EnlistOnline.

dead weed

Timely herbicide applications, from preplanting to postemergence, can help put tough weeds in their place.

™®Trademarks of Dow AgroSciences, DuPont or Pioneer, and their affiliated companies or their respective owners. Enlist Duo and Enlist One herbicides are 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 Duo and Enlist One are the only 2,4-D products authorized for use with Enlist crops. Consult Enlist herbicide labels for weed species controlled. Always read and follow label directions. ©2019 Dow AgroSciences LLC

Weed of the Month: Marestail

  • marestailCommon name: Marestail, horseweed, Canada fleabane
  • Scientific name: Conyza canadensis 1
  • Grass or broadleaf: Annual broadleaf
  • Germination timing: Marestail can begin its growing season in fall or spring. Plants that emerge in the fall can survive the winter and continue growing as the row crop emerges.2
  • Marestail begins its growth cycle as a small rosette between one to four inches across. While scouting, it is important to look beneath debris because the plants may otherwise remain hidden.3
  • Many states in the Midwest are fighting the ever-growing population of marestail that is resistant to glyphosate and ALS-inhibiting herbicides.3

Fast facts

  • Marestail can grow up to six feet tall. Once a plant grows up to five inches, control becomes much more difficult.2
  • Each plant can produce 200,000 seeds per plant—which are spread primarily by wind—that can travel to neighboring farms and even nearby states.2
  • According to WeedScience.org, the first confirmation of glyphosate-resistant horseweed was in Delaware in 2000. Since then, resistance has spread across the Midwestern states.
  • Corn and small grains can help control marestail. The canopy of corn can suppress growth, while small grains can be highly competitive. 2

Weed management tips

  • Use a herbicide in the fall: an application of a burndown herbicide in the fall season can aid in marestail control. It is best to apply the herbicide with temperatures above 50 degrees and with low wind.1
  • Scout your fields: By checking the fields before or immediately after harvest, farmers can make plans to control marestail with a fall or spring herbicide.1
  • Plant a cereal rye cover crop: This crop can provide a mulch that will suppress marestail emergence.1
  • Apply a herbicide in the spring: This practice can control weeds that have grown throughout the winter and suppress emergence of any new weeds. Use a burndown herbicide mixed with a residual herbicide for best results.3

Resistance statistics*

  • According to WeedScience.org, herbicide-resistant marestail has been documented in almond, blueberry, corn, cotton, grapes, rice, soybean and wheat production in 25 states: Alabama, Arkansas, California, Delaware, Illinois, Indiana, Iowa, Kansas, Kentucky, Maryland, Michigan, Mississippi, Missouri, Montana, Nebraska, New Jersey, North Carolina, Ohio, Oklahoma, Pennsylvania, South Dakota, Tennessee, Virginia, Wisconsin and West Virginia.

*Resistance confirmation does not include all weeds and may vary among different areas of each state.

Corteva Agriscience, Agriculture Division of DowDuPont, offers the following weed control solutions:

Corn Herbicides

DuPont Cinch® ATZ herbicide
Durango® DMA® herbicide
Elevore® herbicide
Enlist Duo® herbicide, as part of the Enlist weed control system
Enlist One herbicide, as part of the Enlist weed control system
FulTime® NXT herbicide
Keystone® LA NXT herbicide
Keystone® NXT herbicide
DuPont Realm® Q herbicide
Resicore® herbicide
SureStart® II herbicide

Soybean Herbicides
Durango® DMA® herbicide
Elevore herbicide
Enlist Duo® herbicide, as part of the Enlist weed control system
Enlist One herbicide, as part of the Enlist weed control system
DuPont EverpreX® herbicide
FirstRate® herbicide
Sonic® herbicide
Surveil® herbicide
DuPont Trivence® herbicide
DuPontEnlite® herbicide
DuPontAfforia® herbicide
DuPont™ FeXapan™ herbicide Plus VaporGrip® Technology


Sources:

1Integrated Crop Management News and Iowa State University Extension and Outreach 2017. Fall Marestail (Horseweed) Management. https://crops.extension.iastate.edu/cropnews/2017/10/fall-marestail-horseweed-management
2 Penn State Extension 2017. Marestail (Horseweed) Management. https://extension.psu.edu/marestail-horseweed-management
3Nebraska Institute of Agriculture and Natural Resources 2016. Fall is Optimal for Marestail Management. https://cropwatch.unl.edu/2016/fall-optimal-marestail-management

 

®™℠Trademarks and service marks of Dow AgroSciences, DuPont or Pioneer, and their affiliated companies or their respective owners. Cinch ATZ, FeXapan Plus VaporGrip Technology and Keystone LA NXT are Restricted Use Pesticides. Durango DMA, Elevore, EverpreX, FulTime NXT, Keystone NXT, Realm, Resicore, Sonic, SureStart II, Surveil and Trivence are not registered for sale or use in all states. FulTime NXT, Keystone LA NXT, Keystone NXT, 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. Enlist Duo and Enlist One herbicides are not registered for sale or use in all states or counties. Enlist Duo and Enlist One herbicides are the only 2,4-D products authorized for use in Enlist crops. DuPont™ FeXapan™ herbicide plus VaporGrip® Technology is a Restricted Use Pesticides. DuPont™ FeXapan™ herbicide plus VaporGrip® Technology is not registered for sale or use in all states. IT IS A VIOLATION OF FEDERAL AND STATE LAW TO MAKE AN IN-CROP APPLICATION OF ANY DICAMBA HERBICIDE PRODUCT ON SOYBEANS WITH Roundup Ready 2 Xtend® technology, OR ANY OTHER PESTICIDE APPLICATION, UNLESS THE PRODUCT LABELING SPECIFICALLY AUTHORIZES THE USE. Contact the U.S. EPA and your state pesticide regulatory agency with any questions about the approval status of dicamba herbicide products for in-crop use with soybeans with Roundup Ready 2 Xtend® technology and follow all pesticide product labeling. Soybeans with Roundup Ready 2 Xtend® technology contain genes that confer tolerance to glyphosate and dicamba. Glyphosate herbicides will kill crops that are not tolerant to glyphosate. Dicamba will kill crops that are not tolerant to dicamba. Roundup Xtend®, VaporGrip®, Roundup Ready 2 Xtend® (Monsanto). VaporGrip® Technology is used under license from Monsanto Technology LLC. Always read and follow label directions. ©2019 Dow AgroSciences LLC

Poll of the Month

Maximize Above-ground Nitrogen Applications With New PinnitMax™ Nitrogen Stabilizer

By: Tina Troester, nitrogen management specialist, Corteva Agriscience™, Agriculture Division of DowDuPont  

As farmers reflect on this past growing season and make plans for spring, nutrient management is a large part of the equation. Nitrogen stabilizers are an important component of nutrient management plans, and Corteva Agriscience, Agriculture Division of DowDuPont, has announced a new nitrogen stabilizer that fills an industry need and adds to its nitrogen maximizer portfolio.

PinnitMax addresses a need for better handling with above-ground nitrogen stabilizers by providing a user-friendly urease inhibitor that maximizes application of urea and UAN. This solution from Corteva Agriscience adds to the nitrogen maximizer portfolio, which currently includes N-Serve and Instinct below-ground nitrogen stabilizers. Now, farmers and retailers can select from our comprehensive protection of any nitrogen source above- and below-ground.

PinnitMax specifically prevents volatilization of urea and UAN applications for up to 14 days, ensuring nitrogen gets into the root zone for optimum crop uptake. The unique formulation of PinnitMax also allows for simple blending, free-flowing applications and effortless cleanup — freeing up labor and processing time for a more efficient operation. In addition, PinnitMax contains an exclusive composition of the active ingredient, NBPT. This composition makes PinnitMax™ the most powerful, gallon-for-gallon, above-ground nitrogen stabilizer with an ultra-low use rate.

PinnitMax completes the existing nitrogen maximizers portfolio from Corteva Agriscience by providing above-ground nitrogen protection in addition to the two below-ground nitrogen stabilizers, N-Serve and Instinct. All fertilizer types can be protected with this portfolio: PinnitMax for above-ground urea and UAN applications, N-Serve for below-ground anhydrous ammonia applications and Instinct for below-ground urea, UAN and manure applications. PinnitMax works above ground to help your nitrogen get to the root zone. N-Serve and Instinct technology work below ground to keep it there.

Best of all, the portfolio has more than 40 years of experience shaping the nitrogen stabilizer category along with the most extensive university research available, providing the proof of efficacy that so many farmers and retailers look for and expect.

row of corn

About the author: Tina Troester is a nitrogen management specialist at Corteva Agriscience, Agriculture Division of DowDuPont. Tina joined Corteva Agriscience in June 2018 and owns and operates a cow/calf and cattle finisher enterprise targeting the locally grown market in Garnavillo, Iowa.

™®Trademark of Dow AgroSciences, DuPont or Pioneer, and their affiliated companies or their respective owners. 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. ©Dow AgroSciences LLC