Sonic®

Herbicide

Battle weeds

Sonic® herbicide delivers exceptional broad-spectrum and long-lasting control to optimize soybean yield potential. Sonic can be applied preemergence up to three days postplant before the soybean emerges for an early start against yield-robbing weeds. It features two unique modes of action to attack weeds multiple ways and effectively manage herbicide resistance.

Fact Sheet

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Supplemental Information

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Benefits

Maximized yield potential

Sonic® herbicide provides preemergence control of tough broadleaf weeds to maximize soybean yield potential.

Multiple modes of action

Containing two modes of action, Sonic effectively manages weed resistance to protect from the toughest yield-robbing weeds.

Convenient

Sonic is a convenient tank-mix partner that is easy to use and handle.


Featured Weeds

 

Sonic® herbicide stops hard-to-control weeds before they can invade soybean fields. With long-lasting residual control, Sonic keeps working to defend against yield-robbers.

Barnyardgrass

Barnyardgrass

Life cycle: Annual

Description: Barnyardgrass is an annual grass that prefers wet sites. Stems of young barnyardgrass plants often grow outward along the ground before turning upward. Stems are flattened near the base and may reach a height of 5 feet. This weed is the only common summer grass that has no hairs or membranes at the collar region and lacks a ligule. Flower heads are extremely variable but they often droop slightly, with lower flower branches farther apart than upper ones. It is closely related to and resembles junglerice without the distinctive purple bands.

Control: Preemergence, 4 to 6 oz./A Sonic® herbicide + 1 pt./A 2,4-D + 24 to 40 oz./A Durango® DMA® herbicide

Cocklebur

Cocklebur

Life cycle: Annual

Description: A summer annual that produces a conspicuous prickly cocklebur and ranges from ½ foot to 6½ feet in height. The relatively large, linear to oblong, waxy cotyledons help to distinguish this weed in the early stages of development. In addition, the long triangular leaves, stems with maroon to black lesions, and the distinctive prickly cocklebur fruit all are features that help in the identification of this weed. The cotyledons of common cocklebur are much longer and more linear than those of giant ragweed.

Control: Preemergence, 4 to 6 oz./A Sonic® herbicide + 1 pt./A 2,4-D + 24 to 40 oz./A Durango® DMA® herbicide

Giant ragweed

Giant ragweed

Life cycle: Annual

Description: Giant ragweed is a summer annual that can grow up to 16 feet tall. Its leaves are large and distinctively three-lobed but can sometimes be five-lobed. Its rough, hairy leaves are about 6 inches long and 4 to 6 inches wide. Opposite leaves occur in pairs at nodes. It prefers moist soil.

Control: Preemergence, 4 to 6 oz./A Sonic® herbicide + 1 pt./A 2,4-D + 24 to 40 oz./A Durango® DMA® herbicide

Ivyleaf morningglory

Ivyleaf morningglory

Life cycle: Annual

Description: A summer annual twining or climbing vine with distinctive three-lobed leaves and large showy purple to blue or white flowers. Cotyledon leaves have a distinctive butterfly shape. Leaves, stems and fruit can be somewhat hairy. It produces burlike seedpods.

Control: Preemergence, 4 to 6 oz./A Sonic® herbicide + 1 pt./A 2,4-D + 24 to 40 oz./A Durango® DMA® herbicide

Lambsquarters

Lambquarters

Life cycle: Annual

Description: Common lambsquarters is a summer annual with medium to pale green stems with red stripes. Stems tend to be multibranched, growing 1 to 6 feet tall. Leaves are shaped like a goose foot, often with a whitish powdery coating. Common lambsquarters prefers fertile, cultivated soils, meaning that a lambsquarters infestation is a good indicator of good soil.

Control: Preemergence, 4 to 6 oz./A Sonic®herbicide + 1 pt./A 2,4-D + 24 to 40 oz./A Durango® DMA® herbicide

Marestail (horseweed)

Marestail (horseweed)

Life cycle: Annual

Description: Marestail is an erect winter or summer annual reaching 6½ feet in height. Seedlings develop a basal rosette from which sprouts a 2- to 6-foot tall stalk covered with narrow leaves. The stems usually are hairy and branch near the top. At the top of the stalks are small white flowers that ripen to white, windblown parachute seeds.

Control: Preemergence, 4 to 6 oz./A Sonic® herbicide + 1 pt./A 2,4-D + 24 to 40 oz./A Durango® DMA® herbicide

Palmer amaranth (pigweed)

Palmer amaranth (pigweed)

Life cycle: Annual

Description: An erect summer annual that may reach 6½ feet in height. Seedlings have leaves that are narrow and green to reddish in color. Its first true leaves are alternate, oval-shaped and slightly notched at the tip of the leaf. Mature leaves are alternate, without hairs, and lance-shaped or egg-shaped in outline. Leaves are 2 to 8 inches long and a half inch to 2½ inches wide. Stems are without hairs. Leaf petioles often are as long as — or longer than — the leaf blade. Seed heads measure 1 to 2 feet in length.

Control: Preemergence, 4 to 6 oz./A Sonic® herbicide + 1 pt./A 2,4-D + 24 to 40 oz./A Durango® DMA® herbicide

Velvetleaf

Velvetleaf

Life cycle: Annual

Description: Velvetleaf is aptly named because the large leaves are velvety-hairy. It is an erect summer annual with leaves and stems that are covered with short, soft hairs. Seedlings have one round and one heart-shaped cotyledon. The first true leaves and subsequent leaves are alternate, heart-shaped and covered with hairs on both surfaces. Mature leaves are approximately 2 to 6 inches long and wide and have slightly toothed margins.

Control: Preemergence, 4 to 6 oz./A Sonic® herbicide + 1 pt./A 2,4-D + 24 to 40 oz./A Durango® DMA® herbicide

Waterhemp

Waterhemp

Life cycle: Annual

Description: Common waterhemp is a slender, willowy plant with many branches. Mature plants range from 4 inches to 12 feet in height. Stems and leaves often are brightly colored, varying from deep red or pink to emerald green. Its stems, leaves and seed head all may be differently colored on a single individual plant. Stems and leaves are very smooth and hairless with a bright, glossy appearance. Leaves are long and narrow.

Control: Preemergence, 4 to 6 oz./A Sonic® herbicide + 1 pt./A 2,4-D + 24 to 40 oz./A Durango® DMA® herbicide

Controlled Weeds

This product delivers effective weed control against the following:

  • Amaranth
  • Barnyardgrass
  • Crabgrass
  • Horseweed
  • Lambsquarters
  • Mexicanweed
  • Morningglory
  • Mustard
  • Nightshade
  • Panicum
  • Pigweed
  • Pusley
  • Ragweed
  • Smartweed
  • Spurge
  • Thistle
  • Velvetleaf
  • Waterhemp

Refer to the Product Label for complete product efficacy information.

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Proven Efficacy

 

RESIDUAL CONTROL WITH SONIC®
Evaluations made four weeks after application


Testimonials

Scott Johnson, Grower — Minnesota
Grower Scott Johnson of Starbuck, Minnesota, switched to Sonic® herbicide to manage glyphosate resistance and control troublesome broadleaf weeds in his field. Sonic extended the spray window later in the season by keeping weeds small and easier to control.
George Richter, Grower — Indiana
Soybean grower George Richter of Edwardsport, Indiana, knows the importance of keeping fields clean from planting through harvest. To control his most troublesome weeds, including marestail, waterhemp and giant ragweed, Richter uses Sonic® herbicide. With the residual control of Sonic, weeds are managed well into the season.
Mike McFadden, Grower — Ohio
As a fifth-generation farmer in Lees Creek, Ohio, Mike McFadden is familiar with common weeds. To achieve optimized yield, McFadden says it is important that fields are clean when he starts planting, and using Sonic® herbicide ensures that they will be weed-free when he is ready to plant.
Nick Saathoff, Retailer — Illinois
Retailer Nick Saathoff of Heritage FS, Inc., in Bourbonnais, Illinois, finds applying a residual herbicide provides a valuable window of time to manage workloads, attend to other activities or wait out the weather. In addition to saving time, programs using residual herbicides offer additional benefits to soybean growers over glyphosate-only programs.
Gary Mills, Retailer — Iowa
Retailer Gary Mills of West Liberty, Iowa, helps his customers battle marestail, chickweed and other winter weeds. He recommends using Sonic® herbicide and 2,4-D in a fall burndown program to control these difficult weeds in the fall and provide residual control of waterhemp and ragweed in the spring so his customers start with a clean soybean field in spring.

State Registrations

  • Registered
  • Unregistered

Technical Specifications

  • Active Ingredient

    sulfentrazone; cloransulam-methyl

  • Herbicide Group

    Sonic® herbicide contains sulfentrazone, a Group 14 herbicide (PPO inhibitor); and cloransulam-methyl, a Group 2 herbicide (ALS inhibitor).

  • Application Rate
      Fall Spring Planting + 3 Days
      Apply before tillage or no-till Apply early to manage workload and reduce weather variability Apply up to 3 days postplanting to give beans a clean start
    RATE 4-6 oz. 4-6 oz. 4-6 oz.

    High rates recommended when herbicide-resistant weeds are present or when longer residual control is desired

  • Application Timing

    Sonic can be applied preemergence up to three days postplant.


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Resources

  Sonic® Fact Sheet

®™Trademarks of Dow AgroSciences, DuPont or Pioneer and their affiliated companies or respective owners. Elevore, Resicore, Sonic and SureStart II are not registered for sale or use in all states. Resicore and SureStart 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.