Boundary 6.5 EC - Herbicide | Syngenta

Boundary 6.5 EC Videos

Boundary 6.5 EC Videos

Product Overview

Boundary® 6.5 EC herbicide delivers proven early-season grass and broadleaf weed management in soybeans and potatoes, excellent resistance management and rotation flexibility. Boundary 6.5 EC contains 2 sites of action against weeds, such as waterhemp and Palmer amaranth, that are resistant to glyphosate and ALS-inhibitors.
In soybeans, Boundary 6.5 EC applied pre-emergence fits under any trait platform and can be followed by approved dicamba products, glufosinate or Flexstar® GT 3.5 herbicide. Flexstar GT 3.5 is formulated to combat weeds that are difficult to control with glyphosate alone or are resistant to glyphosate and ALS-inhibitors. Boundary 6.5 EC can also be followed by Prefix® residual herbicide in soybeans. 

Dicamba Herbicide Tank-Mix Option in Soybeans

Boundary 6.5 EC is one of several Syngenta herbicide tank-mix options available for inclusion with XtendiMax® with VaporGrip® Technology, Engenia® herbicide and FeXapan herbicide Plus VaporGrip Technology. Tank mixing with dicamba provides you with additional weed management options and resistance management benefits. Please visit the XtendiMax application requirements, Engenia tank mix and FeXapan tank mix pages for approved drift reduction agents.


Product Highlights

  • Protects yields by offering early-season residual management of troublesome weeds
  • Contains 2 non-ALS inhibiting, non-glyphosate and non-PPO inhibiting chemistries for managing tough grass and broadleaf weeds
  • Extends the post-application window up to 5 weeks after planting, keeping fields cleaner longer and allowing for more timely post-emergence applications
  • Is available as a dicamba herbicide tank-mix option in soybeans, expanding options for weed resistance management


Mark Forsyth
Charles City, IA

Mark Forsyth

“A pre-emergence herbicide like Boundary 6.5 EC is important. A rescue treatment is not going to cut it anymore.”

Matt Dop
Retail Sales Agronomist
Monroe, IA

Matt Dop

“We used Boundary 6.5 EC herbicide followed by Flexstar GT 3.5 herbicide on my soybean acres last year. I had a very successful year as far as the weed control goes.”





Download Supporting Boundary 6.5 EC Documents

20162282016526232834_soybean-herb-sell-thumb.jpg PDF
Soybean Herbicide Portfolio Sell Sheet(PDF)
20167572016315214512_Boundary-Flexstar.jpg PDF
Boundary-Flexstar GT 3.5 Sell Sheet(PDF)
2016181201652717288_boundary-sell-sheet-th.jpg PDF
Boundary Sell Sheet(PDF)

Keep Fields Clean With Boundary

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Boundary 6.5 EC - Carousel, Chart
Boundary 6.5 EC - Carousel, Chart
Boundary 6.5 EC - Carousel, Chart
Boundary 6.5 EC - Carousel, Chart
Boundary 6.5 EC - Carousel, Chart
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A full-season herbicide program can prevent weeds from taking root and competing with soybeans for water, nutrients and sunlight. These images show untreated soybeans (left) compared to a program of Boundary® 6.5 EC followed by dicamba post-emergence. Source: Syngenta, 2016; Oregon, MO.

Using a full-season approach to weed management is key to ensure rows start and stay clean throughout the season. On the left, soybeans were treated with a post-emergence only herbicide application. The soybeans on the right were treated with Boundary® followed by Flexstar® GT 3.5. Source: Syngenta trials, 2017; Ina, IL.

The residual control of Boundary® herbicide is easy to see in these clean rows 3 weeks after application. Source: Syngenta, 2017; Cotton Plant, AR.

This image series shows the superior weed management provided by Boundary® followed by Prefix® (right) vs. untreated (left) and Fierce® (center). Source: Syngenta, 2016.

The benefits of using a pre-emergence residual followed by a post-emergence product are clear in these rows surrounded by untreated soybeans. Although the weeds are fighting to spread, Boundary® followed by Flexstar® GT 3.5 is able to hold them back. Source: Syngenta, 2015; MS.


Mar 6, 2018

Syngenta identifies key strategies to manage the spread of resistant Palmer amaranth

Syngenta warns that glyphosate-resistant Palmer amaranth, one of the most threatening weeds in Southern corn and soybean fields, continues to spread into the Midwest. Knowing how to defeat this tough weed is imperative to protect crop yields and manage future resistance.Read more »

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