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Impregnation is the process of applying a concentrated herbicide solution on dry fertilizer granules during the blending process. To get an adequate rate properly distributed, apply DuraCor, GrazonNext HL or Chaparral™ herbicides with at least 200 pounds of dry fertilizer per acre.
Spreader trucks or fertilizer buggies apply the dry product as they would normally apply dry fertilizer alone. From there, rainfall puts the herbicide-fertilizer solution into the soil. DuraCor, GrazonNext HL, and Chaparral are soil active herbicides absorbed by weeds through the roots. Weed control is almost entirely dependent on the soil residual activity of the herbicide and root uptake by the weeds.
Expectations for weed control should be less when compared to foliar applications. However, research trials have demonstrated up to 85% control while many ranchers have reported better results.
DuraCor, GrazonNext HL and Chaparral have no grazing or haying restrictions for any class of livestock, including lactating dairy cows, horses (including lactating mares) and meat animals prior to slaughter. However, label precautions do apply to forage treated with DuraCor, GrazonNext HL and Chaparral and to manure from animals that have consumed treated forage within the last three days. Consult the label for details.
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 Trademarks of Corteva and its affiliated companies or 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 ©2021 Corteva Agriscience