Prefix - Herbicide | Syngenta


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Product Overview

Prefix® residual herbicide offers the proven performance of fomesafen combined with S-metolachlor for superior control of broadleaf weeds and grass in cotton and soybean. By providing timely weed control using two unique modes of action, Prefix is an ideal solution for controlling glyphosate- and ALS-resistant weeds, and its superior weed control helps to maintain clean fields and increase yield potential throughout the season.

Product Highlights

  • Provides timely weed control using two different modes of action to manage key ALS- and glyphosate-resistant weeds
  • Delivers extended residual weed control activity for properly timed post-emergence herbicide applications
  • Offers proven performance against broadleaf weeds and grass
  • Provides excellent crop safety


“We planted a new field this year where the previous farmer hadn’t used any kind of herbicides; it was pigweed heaven. We applied Boundary® and Prefix herbicides, and managed to keep the field clean all year long.” Meredith Baker, Grower, Sherrill, AR

“Prefix herbicide is probably the most important product we have on the market right now to control pigweeds. Pigweeds are becoming resistant to PPO inhibitor herbicides, so Prefix is our No. 1 product on soybeans.” – Matt Miles, Grower, McGehee, AR

Download Supporting Prefix Documents

20162282016526232834_soybean-herb-sell-thumb.jpg PDF
Soybean Herbicide Portfolio Sell Sheet(PDF)
2016431201639214823_Prefix.jpg PDF
Prefix Technical Bulletin(PDF)


Jan 30, 2018

Syngenta stresses the importance of a start-clean, stay-clean approach to manage resistant marestail

Marestail, also known as horseweed, is top of mind for many corn and soybean growers preparing for the 2018 growing season.Read more »

Jan 25, 2018

Syngenta herbicides cleared for tank mixes on Roundup Ready 2 Xtend® soybeans and Bollgard II® XtendFlex® cotton

Syngenta has received confirmation from the Environmental Protection Agency (EPA) that several Syngenta herbicide tank-mix options have been cleared for inclusion with both XtendiMax® with VaporGrip® Technology and Engenia® herbicides.Read more »

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