While Warrant® Herbicide and Harness® MAX herbicide are both acetochlor products, they differ in a key way. The microencapsulation technology used in Warrant Herbicide provides controlled-release weed control, which means increased crop safety and a wide application window. In addition to corn, Warrant Herbicide is labeled for pre- and post-emergence use on soybeans, cotton, grain sorghum and peanuts and provides up to 30 days of strong residual control of small-seeded broadleaf weeds and grasses.
“The flexibility of Warrant Herbicide is such an advantage,” says Riley. “You can apply pre and post. In corn you can make a post-emergence application up to 30 inches. In soybeans Warrant Herbicide can be applied early pre-plant, pre-emergence or post-emergence before the the R2 growth stage. The optimal timing we recommend in soybeans is the V2 or V3 stage, but you can apply later. I like to see Warrant Herbicide used as an early post-emergence application. Because certain herbicides can’t be applied over-the-top of soybeans, growers could start out with a residual herbicide with a different site of action prior to planting and then bring Warrant Herbicide early in-crop. That puts down another layer of control.”
Because Warrant Herbicide is microencapsulated acetochlor, it has an extremely safe profile at response levels, which are typically in the 1½ quart-per-acre range, depending on soil type, Riley says.
“Because the acetochlor is released over time, it alleviates concerns you might have with other Group 15 chemicals on the market,” he says. “Warrant Herbicide has very good levels of soybean crop safety. As a residual it provides excellent control of weeds such as waterhemp and Palmer amaranth.”
While Warrant Herbicide can be used on conventional crops, it works well with Roundup Ready 2 Xtend® soybeans, Riley says. He suggests the tank-mix combination of Warrant Herbicide plus XtendiMax® herbicide with VaporGrip® Technology, a restricted-use pesticide, plus Roundup PowerMAX® herbicide, along with the required DRA (Drift-Reducing Adjuvant) listed on XtendiMaxApplicationRequirements.com.
“It’s a really strong combination that provides excellent residual and post-emergence weed control to help control escapes,” Riley says. “You have your residual with Warrant Herbicide, up to two weeks of soil activity with dicamba and the added post-emergence activity of dicamba and glyphosate.”