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DuPont Leadoff Herbicide

 

DuPont™ LeadOff® Herbicide Preemergence for Pioneer® brand Soybeans with BOLT™ Technology

Background

  • Pioneer® brand soybeans with BOLT™ technology have enhanced tolerance to certain sulfonylurea (SU) herbicides which will allow greater flexibility with herbicides like DuPont™ LeadOff® and DuPont Basis® Blend.
  • Multiple native SU-tolerance traits have been stacked together to create BOLT technology and provide greater tolerance to SU chemistries compared to soybeans with the DuPont™ STS® gene.
  • Pioneer® varieties P49T09BR (MG 4.9) and P50T15BR (MG 5.0) were the first Pioneer brand soybean varieties released with BOLT technology.

Objective

  • Evaluate the use of LeadOff herbicide preemergence on P49T09BR compared to another commonly used preemergence herbicide.

Study Description

Plot Layout:      Replicated on-farm strip trial
Location: Leland, Miss.
Research location map
Years: 2015
Pioneer variety¹: P49T09BR
Preemergence Herbicide Treatments:      LeadOff herbicide 1.0 oz/acre
Boundary® herbicide 2 pt/acre
Planting Date: April 15, 2015
Seeding Rate: 150,000 seeds/acre
 

Early soybean stands with preemergence applications of LeadOff (left) and Boundary (right) herbicides.

Early soybean stands with preemergence applications of LeadOff and Boundary herbicides.
 

Pioneer variety P49T09BR treated with a preemergence application of Boundary (top image below) and LeadOff (bottom image below) herbicides in a Pioneer® GrowingPoint® agronomy research trial near Leland, Miss., in 2015.

Pioneer variety P49T09BR treated with a preemergence application of Boundary and LeadOff herbicides

 

Results

  • Pioneer® variety P49T09BR with BOLT™ technology exhibited excellent tolerance to preemergence applications of LeadOff herbicide.
  • Final stands were slightly higher in plots treated with LeadOff herbicide compared to Boundary herbicide (Figure 1).
  • Faster early growth in LeadOff herbicide-treated plots resulted in faster canopy closure compared to Boundary herbicide-treated plots.
  • Average soybean yield was 3.7 bu/acre greater with LeadOff herbicide-treated plots compared to Boundary herbicide-treated plots (Figure 2).
 

Figure 1. Final plant stands associated with preemergence herbicides near Leland, Miss., in 2015*
*Seeding rate 150,000 seed per acre. Means were not significantly different based on Tukey’s HSD test conducted at the alpha=0.05 level.

Final plant stands associated with preemergence herbicides
 

Pioneer® variety P49T09BR exhibiting excellent emergence and early growth after being treated with a preemergence application of LeadOff herbicide in a Pioneer® GrowingPoint® agronomy research trial near Leland, Miss., in 2015.

Pioneer® variety P49T09BR exhibiting excellent emergence and early growth after being treated with a preemergence application of LeadOff herbicide.
 

Figure 2.Soybean yield associated with preemergence herbicides near Leland, Miss., in 2015*

Soybean yield associated with preemergence herbicides.

*Means were significantly different based on Tukey’s HSD test conducted at the alpha=0.05 level.

 

Canopy development in plots treated with preemergence applications of Boundary herbicide (top image below) vs. LeadOff herbicide (bottom image below) near Leland, Miss., in 2015

Canopy development in plots treated with preemergence applications of Boundary herbicide vs. LeadOff herbicide.

Authors: Jeff Hollowell and Dan Poston


The foregoing is provided for informational use only. Please contact your Pioneer sales professional for information and suggestions specific to your operation. 2015 data are based on average of all comparisons made in one location through Nov.12, 2015. Multi-year and multi-location is a better predictor of future performance. Do not use these or any other data from a limited number of trials as a significant factor in product selection. Product responses are variable and subject to a variety of environmental, disease, and pest pressures. Individual results may vary.

¹ All Pioneer products are varieties unless designated with LL, in which case some are brands. R - Contains the Glyphosate Tolerant trait.

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Glyphosate Tolerant   BOLT
Always follow grain marketing, stewardship practices and pesticide label directions. Varieties with the Glyphosate Tolerant trait (including those designated by the letter “R” in the product number) contain genes that confer tolerance to glyphosate herbicides. Glyphosate herbicides will kill crops that are not tolerant to glyphosate.

Always follow stewardship practices in accordance with the Product Use Guide (PUG) or other product-specific stewardship requirements including grain marketing and pesticide label directions. Varieties with BOLT® technology provide excellent plant-back flexibility for soybeans following application of SU (sulfonylurea) herbicides such as DuPont™ LeadOff® or DuPont™ Basis® Blend as a component of a burndown program or for double-crop soybeans following SU herbicides such as DuPont™ Finesse® applied to wheat the previous fall.

PIONEER® brand products are provided subject to the terms and conditions of purchase which are part of the labeling and purchase documents.
DuPont™ STS®    Varieties with the DuPont™ STS® gene (STS) are tolerant to certain SU (sulfonylurea) herbicides. This technology allows post-emergent applications of DuPont™ Synchrony® XP and DuPont™ Classic® herbicides without crop injury or stress (see herbicide product labels). NOTE: A soybean variety with a herbicide tolerant trait does not confer tolerance to all herbicides. Spraying herbicides not labeled for a specific soybean variety will result in severe plant injury or plant death. Always read and follow herbicide label directions and precautions for use. DuPont™, STS®, Synchrony® XP and Classic® are trademarks or registered trademarks of DuPont or its affiliates.