2021
Row Spacing and Residual Herbicide Use in Enlist and LLGT27 Soybeans
Contributor/Checkoff:
Category:
Sustainable Production
Keywords:
AgricultureCrop protectionHerbicide
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Sarah Lancaster, Kansas State University
Co-Principal Investigators:
Kraig Roozeboom, Kansas State University
Project Code:
2101
Contributing Organization (Checkoff):
Institution Funded:
Brief Project Summary:

This project will quantify the weed control and economic benefit of using a layered residual herbicide with narrow row spacing in two weed management systems. Trials will be conducted in three locations in central and eastern Kansas. Objectives include comparing weed control and soybean yield in 30- and 15-inch row spacing; comparing weed control and soybean yield with and without an over-the-top residual herbicide; and evaluating the interaction of row spacing and overlapping residual herbicide use.

Key Benefactors:
farmers, agronomists, weed specialists, extension specialists, applicators, ag retailers

Information And Results
Project Deliverables

Final Project Results

Update:
Project results have been presented at field days in Ottawa and Scandia, KS. The graduate student managing the project is currently preparing his thesis and the manuscript for publication in a peer-reviewed journal.

Including Dual Magnum in the postemergence herbicide application did not result in a statistically significant increase in visual estimates of weed control at any location, even when there were differences in soybean populations. However, it is important to remember that a small difference in estimated control of weeds like waterhemp and Palmer amaranth can result in greater weed populations in future years. Furthermore, weed escapes increase the likelihood of herbicide resistance, especially in weeds with a lot of genetic diversity, like waterhemp and Palmer amaranth. Results of partial budget analyses varied with location, with few discernable trends.

The United Soybean Research Retention policy will display final reports with the project once completed but working files will be purged after three years. And financial information after seven years. All pertinent information is in the final report or if you want more information, please contact the project lead at your state soybean organization or principal investigator listed on the project.