Management Practices for Pioneer® Brand Soybeans with the Plenish® Trait

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  • Test performance of Plenish® high oleic soybean varieties in MI against key commercial checks.
  • Evaluate the effects of different weed control practices on soybean fatty acid (oil) profiles.
  • Evaluate early-season crop injury from herbicide treatments on Plenish soybean varieties.

Study Description

Location: MSU Agronomy Farm; East Lansing, MI
Plot Layout:  Randomized block, 4 replications
Factors: Soybean variety
  Weed management program
Evaluation: Weed control, herbicide injury, grain yield, oil profiles


Pioneer® Brand Soybean Varieties:
Plenish Varieties: 92Y54 (RR)   92Y61 (RR)
  93Y42 (RR) 93Y30 (RR)
Leader Products: 92Y51 (RR) 93Y05 (RR)


Weed Control Programs
  • PRE fb. MPOS: Envive® fb. Abundit® Extra + AMS
  • PRE fb. POST: Envive + Prowl® H2O fb. Abundit Extra + AMS
  • MPOS fb. LPOS: Abundit Extra + AMS (applied twice)
  • MPOS: Abundit Extra + AMS


  • The 2012 season was marked by extremely dry conditions which led to poor activity with the pre-emergence treatments. A POST application was added to the planned PRE-only program (Envive + Prowl H2O).
  • There was a significant reduction in yield with the PRE fb POST treatment due to the lack of control with the PRE and large weed size (~8 in.) at the time of the POST application. Yield did not differ among the other weed control programs.
  • Oil profiles were consistent across weed control programs for both Plenish and leader soybean varieties.
  • No herbicide injury was observed with any variety or weed control program.
  • Differences in yield were observed among soybean varieties.
  • Average oleic acid content was over 78% for all Plenish soybean varieties, compared to 30% and 35% for the 2 leader varieties.


Main effect of weed control program on oleic acid, linolenic acid, and yield. Oil profile data are averages for leader varieties (top) and Plenish high oleic soybean varieties (above). Yield data are averaged across all varieties. Yield averages with the same letter are not significantly different.


Main effect of variety on oleic acid, linolenic acid, and yield. Data are averaged over weed control systems. Yield averages with the same letter are not significantly different. ^ Indicates Plenish high oleic soybean varieties.

Research conducted by Christy Sprague, Ph.D., Michigan State University, Department of Crop and Soil Science, as a part of the Pioneer Crop Management Research Awards (CMRA) Program. This program provides funds for agronomic and precision farming studies by university and USDA cooperators throughout North America. The awards extend for up to four years and address crop management information needs of Pioneer agronomists, Pioneer sales professionals and customers.

PIONEER® brand products are provided subject to the terms and conditions of purchase which are part of the labeling and purchase documents. 2012 data are based on average of all comparisons made in one location through January 3, 2013. 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. All products are trademarks of their manufacturers.

The DuPont Oval Logo, DuPont™, Abundit® Extra, and Envive® are registered trademarks of DuPont.

Glyphosate Tolerant

R - Contains the Glyphosate Tolerant trait. 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.