Impregnated Fertilizer Treatment Facts


What to Know about Weed & Feed

Deciding What Herbicides for Fertilizer Impregnation

The only currently labeled pasture herbicides available for fertilizer impregnation are GrazonNext® HL and Chaparral™ specialty herbicides.

License Requirements for Treated Fertilizer

Since GrazonNext® HL and Chaparral are federally classified as general use herbicides no RUP license is required. However, in states where 2,4-D has state restrictions a license is required to purchase GrazonNext HL .

Find the map of States with 2(ee) Recommendation for GrazonNext® HL or Chaparral™ impregnation on dry fertilizer here. Scroll to the bottom of the page. 

Application Timing

This application can be used year-round; however, applications made when weeds are young and immature provides the best results and long-term weed control.

Use caution when applying Chaparral to tall fescue as stunting, yellowing, or seed head suppression may occur depending on timing and rate of application. See label for complete details. 

Weed Spectrum Controlled With This Treatment Method

The spectrum of weeds controlled with treated fertilizer extends to most species listed on the GrazonNext HL and the Chaparral labels.

Chaparral™ applied using this method is not recommended for use in bahiagrass pastures or those seeded with ryegrass as injury to those species may occur.

Residual Length

Yes. Expect similar length of control to other rates and treatment methods used for GrazonNext HL and Chaparral applications.

Rainfall Herbicide Activation

Rainfall is required for consistent herbicide efficacy. Typically, a rainfall of at least 0.25 inches within 30 days of application is necessary for consistent herbicide performance.

How Herbicides Work With This Treatment

Weed control is almost entirely dependent on the soil residual activity of the herbicide and plant root uptake. If, however, the treated fertilizer prills land on susceptibleweeds, post-emergent control can occur through this method.

Impregnated Fertilizer and Clover

Treated fertilizer with GrazonNext HL or Chaparral could cause injury to existing stands of clover species.

Compatible Products

GrazonNext® HL and Chaparral™ herbicides are the only currently labeled pasture herbicides available for fertilizer impregnation. 

GrazonNext HL herbicide clears weeds and gets you more grass.

GrazonNext® HL

GrazonNext® HL herbicide is the easiest way to get broadleaf weeds out of the way of pasture production. 

GrazonNext® HL Info
Chaparral™ herbicide is the broadest-spectrum weed and brush control product available for rangeland and pastures.

Chaparral™ herbicide

Chaparral herbicide is the broadest-spectrum weed and brush control product available for rangeland and pastures.

Chaparral™ Info

What to Know Before You Go

 

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Label precautions apply to forage treated with GrazonNext HL and to manure from animals that have consumed treated forage within the last three days. Consult the label for full details. ®,TM, SMTrademarks of Dow AgroSciences, DuPont or Pioneer, and their affiliated companies or their respective owners. GrazonNext and Chaparral are not registered for sale or use in all states. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Both products are labeled for fertilizer impregnation in the states of AL, AR, FL, GA, IA, KS, KY, LA, MO, MS, NC, NE, OK, OR, SC, ND, SD, TN, TX, VA, WV and WA. Always read and follow label directions. R01 392 029 (05/19) 010-58718 ©2019 Corteva Agriscience