Controlling Weeds with Glufosinate? Use Our Handy Cheat Sheet

LeRoy Toohey

Dec. 02, 2019

Glufosinate herbicide has been around in various formulations for many years, dating all the way back to the 1990s with the introduction of Liberty® herbicide products. 

Today you have access to formulations from many different manufacturers, some packaging the same active ingredients under multiple brand names. This is often because products may be labeled for different uses, which is why you must always read and follow the label instructions when selecting herbicides.

Same active ingredient, different uses

The following examples use the same active ingredient—24.5 percent glufosinate ammonium—but may be labeled differently as to where they can be applied:

  • Willowood Glufosinate 280SL

  • Willowood Glufosinate 280SL (OT)

  • Liberty® 280 SL

  • Ignite® 280 SL

  • Rely® 280

  • Cheetah® Herbicide

  • Leopard™ Herbicide

Which glufosinate product should you use?

As with all herbicides, understanding which weeds you have and the size of those weeds will greatly improve your chances of successful control. Scouting your fields in advance of an herbicide application is the best way to figure out application timing and rates. 

Once you have read the label on the product you plan to use, you can apply glufosinate throughout the growing season in conjunction with crop height restrictions as a post-emergence application product on LibertyLink® tolerant crops. 

To avoid severe crop injury, do not apply glufosinate post-emergence to non-LibertyLink® traited crops. Soybeans, cotton, corn and canola all have LibertyLink® options, but confirm with your seed provider that you are purchasing the correct products to which you can apply glufosinate post-emergence. 

Combination herbicide tolerances are also available, stacking glufosinate with other herbicide chemistries. Enlist™ E3, XtendFlex®, Agrisure® and SmartStax® have the glufosinate trait combined with other herbicide traits. Confirm on the seed tag that glufosinate and other herbicides are approved for application.

Glufosinate herbicides can be applied as a standalone burndown herbicide in the fall and spring, but it is better to tank mix with different herbicide modes of action to reduce chances of seeing resistant weeds in your fields. Remember to always perform a jar test to confirm compatibility.

No matter when you plan to apply glufosinate, always remember to add the appropriate adjuvant and surfactant. Rates and approved adjuvants can vary by region and tank mix partners; consult the herbicide label to figure out what you need in your area. 

Lastly, keep excellent records during spring planting to ensure you know where you’ve planted LibertyLink® crops and promote a positive experience with glufosinate.

Looking for more affordable solutions to pest pressure?

With FBN Direct, you can buy generic ag chemical products online—including glufosinate herbicide—and achieve significant savings for your operation. Plus, you’ll receive hands-on support from an Agronomy team that does not work on commission to help protect your bottom line.

LibertyLink® is a registered trademark of BASF Ag Products. Enlist E3™ is a registered trademark of Dow AgroSciences LLC. Agrisure is a registered trademark of Syngenta Crop Protection, LLC. XtendFlex™ Deltapine®, and SmartStax® are registered trademarks of Monsanto Company. Glufosinate 280SL and Glufosinate 280SL (OT) are registered trademarks of Willowood USA, LLC/Generic Crop Science LLC. Liberty® 280 SL by Bayer CropScience LP, Ignite® 280 SL and Rely® 280 are registered trademarks of Bayer CropScience LP. Cheetah® Herbicide and Leopard™ Herbicide are registered trademarks of Nufarm Inc.

ALWAYS READ AND FOLLOW LABEL USE INSTRUCTIONS. It is a violation of federal and state/provincial law to use any pesticide product other than in accordance with its label. The distribution, sale and use of an unregistered pesticide is a violation of federal and/or state law and is strictly prohibited. It is your responsibility to confirm prior to purchase and use that a product is labeled for your specific purposes, including, but not limited to, your target crop or pest and its compatibility with other products in a tank mix. This information should not be used as a replacement for consulting the applicable product label. Consult the label for the most complete and up-to-date information about any referenced product. Readers must have a valid applicator license to use restricted use pesticides. Please consult your state department of agriculture for complete rules and regulations on the use of restricted use pesticides, as some products require specific record-keeping requirements.

LeRoy Toohey

Dec. 02, 2019