Evaluation of Herbicide Programs for Weed Control in Glyphosate, Glufosinate and Dicamba Tolerant Soybeans

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Date
2020-01-01
Authors
Spolyar, Addison
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Dr. Robert Hartzler
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Agronomy

The Department of Agronomy seeks to teach the study of the farm-field, its crops, and its science and management. It originally consisted of three sub-departments to do this: Soils, Farm-Crops, and Agricultural Engineering (which became its own department in 1907). Today, the department teaches crop sciences and breeding, soil sciences, meteorology, agroecology, and biotechnology.

History
The Department of Agronomy was formed in 1902. From 1917 to 1935 it was known as the Department of Farm Crops and Soils.

Dates of Existence
1902–present

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  • Department of Farm Crops and Soils (1917–1935)

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Agronomy
Abstract

As herbicide resistance increases in the tri-state area of Michigan, Ohio and Indiana, soybeans with tolerance to multiples herbicide modes of action are increasing in popularity. This project looks at soybeans with tolerance to glyphosate, glufosinate and dicamba to determine best practices for utilizing this technology. Eleven different herbicide treatments with variations across pre, post and late post applications, as well as an untreated control, were evaluated at three different timings across three sites to showcase differences between weed control efficacies. Soybeans were taken to harvest to showcase differences not only in weed control at this time but also in yield. Pre products applied showed varying differences of weed control across species. Post applications that contained dicamba provided better weed control of both lambsquarters and velvetleaf. A two pass approach will remain the most effective approach where multiple modes of action are used in both the pre and post timing. This provided the highest levels of yield as well as weed control at the time of harvest. This weed control approach will also decrease the selection pressure placed on the emerged weeds at the time of the post application.

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Wed Jan 01 00:00:00 UTC 2020