Kochia Burndown Comparison - NE

TRIAL OBJECTIVE

  • This trial compared burndown control of glyphosate-resistant kochia using XtendiMax® herbicide with VaporGrip® Technology plus Roundup PowerMAX® herbicide, Enlist One® herbicide with Colex-D® Technology plus Roundup PowerMAX® herbicide, or Enlist Duo® herbicide with Colex-D® Technology.

 

RESEARCH SITE DETAILS

Location Gothenburg, NE Application Date  5/15/19
Soil Type Silty loam Kochia Height at Application 4 inches
Previous Crop Soybean Nozzle TTI 110015
Tillage Type Conventional Spray Volume (gallons/acre) 15
  • This trial was placed in an area that was planted to corn because kochia pressure was extremely high. Treatment 2, 5, and 6 are not labeled for corn and are meant for demonstration of kochia control prior to soybeans.
  • Plots were 10 feet wide by 30 feet long, and each treatment was replicated three times.

     

UNDERSTANDING THE RESULTS

  • At 14 days after application, kochia control was 94% for both treatments containing XtendiMax® herbicide with VaporGrip® Technology. Control did not exceed 82% using Enlist One® Herbicide with Colex-D® Technology or 78% using Enlist Duo® Herbicide with Colex-D® Technology  for this trial (Figure 1).

  • At 28 days after application, kochia control exceeded 95% for both treatments containing XtendiMax herbicide with VaporGrip Technology. Control with Enlist One® Herbicide with Colex-D® Technology and Enlist Duo® Herbicide with Colex-D® Technology did not exceed 66% (Figure 2) for this trial.

  • For this trial, kochia control was significantly (p<0.001) greater at both application rates of XtendiMax herbicide with VaporGrip Technology than in the treatments with Enlist One® Herbicide with Colex-D® Technology and Enlist Duo® Herbicide with Colex-D® Technology.

     

KEY LEARNINGS

  • Kochia is an early emerging weed that can present challenges for burndown prior to planting corn and soybeans.

  • XtendiMax® herbicide with VaporGrip® Technology plus Roundup PowerMAX® herbicide provided significantly greater control of kochia when compared to Enlist One® Herbicide with Colex-D® Technology or Enlist Duo® Herbicide with Colex-D® Technology at this location in these conditions.

  • The ability to use dicamba for burndown prior to soybean emergence in Roundup Ready 2 Xtend® soybeans provides an advantage for kochia control.

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