Reduce Weather-Related Weed Control Risks With New Corn Herbicide

Brought to You by Corteva Agriscience

ADVERTORIAL

Weather extremes have added another layer of risk for Corn Belt farmers as they plan their weed control strategies. Spring storms, for example, can delay field work, giving weeds a head start, while extended dry weather can adversely affect activation of preemergence and preplant residual herbicides. Suddenly, your Plan A for weed control must switch to Plan B or even C, and along with it, your level of risk. Your risk level just got higher.

Fortunately, for the 2025 cropping season, Corteva Agriscience is helping overcome such weather risks by launching Resicore(R) REV herbicide. The herbicide-resistant weed management tool is a new formulation of Resicore herbicide and the three proven active ingredients and modes of action, resulting in a wider application window, more crop safety and added tank-mix flexibility.

SPRING WEATHER CHALLENGES

"So many areas across the Corn Belt experienced heavy rains this past spring, which led to planting and application delays," says Joe Bolte, Corteva market development specialist for Missouri and Kansas. "This caused growers to pivot and change plans as they could not make preplant or preemergence herbicide applications due to wet fields."

Similarly, temperatures and heat units were higher than average, allowing weeds like waterhemp and Palmer amaranth to take off. This put tremendous pressure on making a timely postemergence application before weeds and corn growth size became too large.

In other areas, drier weather challenged preplant and preemergence residual herbicide activation, placing more risk on achieving a successful postemergence application.

On the bright side, growers who were fortunate to make timely preemergence herbicide applications with residual saw good early-season weed control. When Mother Nature allows this Plan A to thrive, it often helps growers improve postemergence weed control on fewer and smaller weeds.

Bolte says research trials with Resicore REV herbicide in 2024 saw great success with this flexible management tool across multiple weather scenarios.

"Growers tell us that application flexibility is a huge benefit because they can't change the weather," Bolte says. "Having a residual-based corn herbicide product with a wide application window and crop safety like Resicore REV herbicide -- from preplant to postemergence up to 24-inch corn -- creates a tool that encompasses Plans A, B and C without the need to pivot to a different tool."

RESEARCH TRIAL RESULTS

In research plot trials, Bolte says growers were most excited about Resicore REV herbicide exhibiting the same excellent weed control as Resicore herbicide, with an expanded postemergence label and crop safety up to 24-inch corn thanks to encapsulated acetochlor in the product.

"Along with crop safety and excellent efficacy, research plots showed effective preplant and preemergence applications when tank-mixed with liquid fertilizers like UAN and ammonium thiosulfate," he says. "Growers like the fertility option to improve crop growth and yield while achieving up to eight weeks of residual weed control."

Bolte explains Resicore REV herbicide works across the Corn Belt to control the most difficult weeds such as waterhemp, Palmer amaranth, giant ragweed, common ragweed and marestail. The proven modes of action in clopyralid, mesotrione and encapsulated acetochlor control 75 tough broadleaf and grass weeds. It works in different agronomic scenarios, from conventional tillage to no-till, while labeled for use on both traited and non-traited corn.

Growers also find the program approach effective in reducing herbicide-resistant waterhemp, Palmer amaranth and other tough weeds. "We recommend optimizing corn yields by starting clean with a burndown application, followed by a preplant or preemergence and then a post spray," Bolte says. "Resicore REV herbicide has the flexibility to fit this program."

ONE PASS OR SPLIT APPLICATION

Resicore REV herbicide shows excellent weed control in corn as either a one-pass or a split application. Depending on soil type and rate, Bolte likes splitting the total rate of Resicore REV herbicide between a preemergence and postemergence application.

"By putting a half-rate down preplant or preemergence, we're activating residual control to buy time for an effective post application later. If wet weather delays either application, we can switch to Plan B and still rely on the power of Resicore REV herbicide," he says. "Be sure to consult the label for specific rates and restrictions when deciding your one-pass or split-application program."

As temperatures climb during postemergence application season, growers can be assured they can apply Resicore REV herbicide on corn up to 24 inches tall with excellent crop safety. This is a wider application window compared with Resicore herbicide, which must be applied before the corn reaches 11 inches in height. Also, Resicore Rev herbicide is formulated for increased crop safety with an encapsulated acetochlor.

For 2025, Bolte recommends building a well-rounded weed control program that targets your most difficult herbicide-resistant weeds using a burndown, preemergence, and postemergence application, and non-herbicide management practices like tillage, crop rotation or cover crops.

"Resicore REV herbicide offers tremendous application flexibility along with residual control across various weather conditions," he says. "A preemergence and postemergence application helps reduce herbicide resistance, the weed seed bank and future weed control headaches."

For more details about Resicore REV herbicide, talk to your local retailer or Corteva representative.

**

-- For immediate product information, technical bulletin, product label and a mixing and handling guide, visit the website for Resicore REV herbicide at https://www.corteva.us/…

-- Be sure to read and follow label directions.

[PF_1224]

(c) Copyright 2024 DTN, LLC. All rights reserved.