Skip to main content
 
 
Prefix
The Flexibility to Manage on Both Sides of Planting

Effective when applied before or after planting, Prefix® herbicide offers powerful residual control – even in seasons with challenging conditions – for flexible weed management.

Overview

Prefix Herbicide

A flexible application window enables Prefix to be applied as a preemergence herbicide or, if overlapping your residuals as part of a two-pass program, an early post-emergence herbicide with residual control of up to five weeks. Its extended residual activity against key grass and broadleaf weeds makes it an effective part of an integrated weed management plan.

Active Ingredients:

S-metolachlor, Sodium Salt of Fomesafen

Resistance Management:

Derived From:

Beneficial Substances:

Loading Label Details

States
Crops
Weeds, Pests & Diseases
x
Current Label States Previous Label States
      Current Label Crops Previous Label Crops
            Special Labels
            Worker Safety
            x
            Current Label States Previous Label States
                Current Label Crops Previous Label Crops

                      Restricted Entry Interval:

                      PPE required for Applicators, Mixers or Loaders:

                      PPE required for Early-Entry Workers:

                      Composition

                        Please select a state to see Special Labels

                          Special Labels for Rhode Island Change State

                          Benefits

                          • Fits under any trait platform, giving growers greater flexibility and options in their integrated weed management plans
                          • Provides timely weed management using 2 effective sites of action to manage key ALS- and glyphosate-resistant weeds
                          • Delivers extended residual activity – up to 5 weeks – against key grass and broadleaf weeds
                          • Provides application flexibility with a preplanting program that ensures clean fields when soybeans go into the ground, or an early post-planting program that kills weeds before they can emerge
                          • Is the flexible solution to remove the competition of problem grass and broadleaf weeds, to help preserve yields
                          • Provides tank-mix capability to enhance all popular soybean herbicide programs, expanding the options for weed resistance management
                          • Can be followed by an application of glufosinate. Boundary® 6.5 EC herbicide can also be used as a preemergence treatment when applied in a system with an early post-emergence application of Prefix
                           

                          Performance

                          See the Difference With Prefix

                          prefix herbicide soybeans

                          A preemergence application of Prefix can control early-season weeds before the competition for sunlight, water and nutrients affects your soybean yield. As seen in these plots, Prefix provides stronger weed management than other preemergence options.

                          prefix herbicide

                          Take pressure off of your post-emergence application by applying a preemergence herbicide with longer residual control, which can make a big difference, as seen in these trial plots. On the right, Prefix controlled tough weeds.

                          prefix herbicide

                          Prefix fits under any trait platform, delivering flexibility for growers as they plan their inputs each growing season. This soybean row remains clean after a two-pass treatment of Prefix followed by Sequence® herbicide.

                          prefix herbicide

                          The longer residual control of Prefix helps keep fields cleaner longer and gives growers additional flexibility for their early post- and post-emergence application timing.

                           
                           
                           
                           

                          Testimonials

                          Andy Perkins standing in field treated with pre emergent herbicide.

                          "We have Palmer pigweed on our farm, and Prefix herbicide has been working really well on our soybeans, where we have sensitive acres and we can’t spray dicamba."

                          Timothy Bennet standing in field treated with pre emergent herbicide.

                          "Prefix herbicide is a mix of fomesafen and Dual II Magnum® herbicide. The Dual II Magnum gives you a good residual on waterhemp later in the season. The fomesafen gives you a bit of residual, but also helps with the killing of waterhemp."

                          Calvin Seitz standing in field treated with soybean herbicide.

                          "I highly suggest putting Prefix herbicide with dicamba on soybeans, because it gives you another site of action to knock out some of the hard-to-control broadleaf weeds."

                           
                           

                          Videos

                           

                          Testimonials

                          Jim Campion
                          Grower
                          Stark County, IL

                          Jim Campion

                          “With Prefix herbicide, we can see 21 days on post-emergence if weather conditions are right.”

                          Tim Bennett
                          Retailer
                          Bowling Green, MO

                          Timothy Bennett

                          “Adding Prefix herbicide to our program has made all the difference in trying to control late-season, late-germinating weeds.”

                           

                           

                           

                           

                           

                          Supporting Materials

                          Want to talk?

                          Have questions about this product or need guidance for your operation? Your local Syngenta representative can help you choose the right solution and answer your agronomic questions.

                          Find your local Syngenta Rep
                           

                          Ready to buy?

                          Ready to get started? Connect with a Syngenta retailer near you to purchase this product and get the local support you need for a successful season.

                          Find your local Retailer
                          CP Products