Alion Herbicide FAQ

Alion Product Overview


What is Alion herbicide?

Alion® herbicide provides a long-lasting, unique solution for pre-emergence control of a wide range of grass and broadleaf weeds, including those resistant to other herbicides, all without compromising crop safety. Learn more about Alion herbicide.

How does Alion work?

The active ingredient in Alion is a cellulose-biosynthesis inhibitor (CBI), classified as a Group 29 herbicide. These herbicides work by affecting cell wall formation, as well as cell elongation and division. There are currently no documented cases of resistance to Group 29 herbicides in the United States, making Alion an excellent option for your herbicide resistance management plans.





Alion Product Specs


What weeds can I control with Alion?

Alion herbicide controls a broad spectrum of grass and broadleaf weeds, including those resistant to other herbicide classes, such as ACCase, ALS, triazine and glyphosate-resistant weeds. Find out if Alion is effective on the weeds on your operation.





Alion Application and Use


What is the use rate of Alion?

Alion should be applied at 3.5 to 6.5 ounces per acre, depending on crop and soil organic matter content, with an annual maximum rate of 10.3 fluid ounces per acre for citrus groves. For pome and stone fruit, tree nuts and olives, the annual maximum rate is 7 to 10.3 ounces per acre, depending on soil organic matter content. Review the Alion herbicide label for detailed application information.

Is rainfall required for Alion to be incorporated into the soil?

After application, an initial 48 hours of dry soil surface allows the active ingredient in Alion to bind to soil particles. For optimum performance, this dry period should be followed by moisture from rain or irrigation.

When should I apply Alion?

Alion herbicide can be applied up to 14 days prior to harvest on all crops other than citrus, which requires a pre-harvest interval of seven days. Best performance occurs when applied prior to rain and before weed emergence. When weeds are up, it is recommended to add a post emergence herbicide.

When making more than one application per year, allow a minimum of 90 days between applications. Find additional application information on the Alion herbicide label.





Alion Product Safety


Is Alion safe to use on my crops?

Alion is available for use in pome and stone fruit, pecan, and olive orchards where the trees have been established for at least three years and exhibit normal growth and good vigor. For use in tree nuts, except pecan, only use Alion Herbicide in orchards where the trees have been established for at least one year and exhibit normal growth and good vigor. Alion Herbicide can be applied in grapes that have been established for a minimum of three years after transplanting and exhibit normal growth and good vigor.

Find out if Alion is registered for your crops.

Are there crop rotation restrictions with Alion?

Only crops listed on the label may be replanted or rotated 24 months after the last application of Alion.

Alion is intended for use in perennial tree and vine crops listed on the label and for non-crop farmstead uses. Do not rotate to any crops not listed on the label within 24 months after the last application. Planting earlier than this may result in crop injury. Refer to the Alion label for more detailed information.





Ask Bayer

Looking for additional information about Alion herbicide? Contact us.



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