Project Details:

Timing of pre-plant herbicide programs for weed control in no-till soybeans in southwest North Dakota

Parent Project: This is the first year of this project.
Checkoff Organization:North Dakota Soybean Council
Categories:Agronomy, Weed control
Organization Project Code:NDSC 2023 Agr 21
Project Year:2023
Lead Principal Investigator:Caleb Dalley (North Dakota State University- Hettinger Research Extension Center)
Co-Principal Investigators:

Contributing Organizations

Funding Institutions

Information and Results

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Project Summary

The number of acres planted to soybean in southwest North Dakota are increasing each year. Controlling weeds in these soybeans will be critical to successful production. As these soybeans will be planted under no-till, selection of appropriate pre-plant or at-planting herbicides will be necessary to reduce weed interference and maximize yield, especially considering the low rainfall environment where yield is already limited. As many of the acres planted in southwest
North Dakota will be with glyphosate-resistant varieties developed through the NDSU Soybean Breeding Program, pre-emergence weed control will be extremely important for controlling difficult weeds as postemergence options will be limited. Weeds such as kochia and wild buckwheat are difficult to control with glyphosate alone, especially if they exceed 2 to 3 inches in height. Thus, it is essential that these weeds be controlled as much as possible through pre-plant burndown and preemergence herbicide applications. Trials will be conducted to evaluate timing of preplant herbicides for control of weeds and for soybean tolerance, Herbicide treatments will be applied 0, 1, and 2 weeks prior to planting. These treatments will be followed by glyphosate application in-crop at 2 weeks after crop emergence. Trials will be -visually evaluated for weed control and soybean injury at 1, 3, and 5 weeks after emergence. Soybean density will be measured at 3 weeks after emergence and soybean height will be measured at 5 weeks after emergence. Soybean yield will be measured by harvesting with a plot combine upon crop maturity.

Project Objectives

1) Evaluate pre-plant and preemergence herbicides for control kochia and wild buckwheat in soybean
2) Evaluate response of soybean to pre-plant and preemergence herbicides
3) Evaluate soybean yield in response to herbicide applications for kochia and wild buckwheat control

Project Deliverables

Research results will be presented at crops day and county extension meetings. Research will also be published in annual reports and as journal articles in peer-review journals.

Progress of Work

Updated November 30, 2022:

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Final Project Results

Benefit to Soybean Farmers

The expansion of soybean acres into southwest North Dakota will require increased knowledge of weed control under environment conditions and no-till cropping system of southwest North Dakota. Identifying herbicides programs that will effectively control difficult weeds in no-till soybean will help to increase profitability of growing soybeans in a difficult environment for soybean.

Performance Metrics

Results from trial will be shared with growers at the Western Dakota Crops Day in Hettinger, ND on December 15, 2022

Project Years