C.O.R.N. Newsletter: 2020-39
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Non-GMO Soybean Weed Management Fact Sheet
An updated version of the fact sheet “Herbicide Programs for non-GMO soybeans” is now available. A print ready version can be found here, and it’s also available on Ohioline here. The basic approach with herbicides has not changed much. Weed control in non-GMO soybeans can be challenging, and increases the selection for resistance to site 14 herbicides (fomesafen, Cobra). The new version emphasizes several things, including:
- Plant non-GMO soybeans in fields with a history of several years of crop rotation and effective weed control that has prevented weed seed return to the soil and reduced weed populations.
- Maintain a rotation where non-GMO soybeans are planted every four years, with two years of corn and one year of traited soybeans in between, or other crops as appropriate for the farm operation.
- Fall herbicide treatments should be used to manage marestail, winter annuals, dandelion, and other perennial weeds. Marestail can be especially difficult to control in no-till, non-GMO soybeans unless a fall herbicide treatment is used.
- Planting non-GMO soybeans in fields with waterhemp is not recommended due to the high frequency of resistance to ALS and PPO inhibitors, which eliminates all POST options for control.
As always, contact us with questions or for more information – loux.1@osu.edu.
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2020 Ohio Soybean Performance Trial: Results from All Locations Available
The purpose of the Ohio Soybean Performance Trials is to evaluate soybean varieties for yield and other agronomic characteristics. This evaluation gives soybean producers comparative information for selecting the best varieties for their unique production systems. A pdf copy of the trial can be downloaded here: https://stepupsoy.osu.edu/soybean-production/variety-selection/ohio-soybean-performance-trial The data are also be available on the Ohio Crop Performance Trials website (https://www.oardc.ohio-state.edu/soy2020/) in a sortable format.
The 2020 trial included 21 brands of soybean tested in six Ohio counties (Henry, Sandusky, Mercer, Morrow, Preble, and Clinton). Entries included non-GMO (conventional), Liberty Link, Xtend, Enlist, and Liberty Link/Glyphosate tolerant. In the north region, soybean yield averaged 51 to 53 bu/acre. In the central region, yield averaged 57 to 60 bu/acre, and in the southern region, yield averaged 72 to 76 bu/acre.
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Now is the Time to Adjust your Water Table Level
With Ohioans nearing completion of the harvest season for grain crops, producers throughout the state are also working to finish post-harvest field operations such as fertilization, herbicide and manure applications, and fall tillage. Once these operations are completed fields will receive little traffic in the coming months, until preparation for planting begins in early spring.
Because of this reduced need for trafficability, subsurface drainage systems do not necessarily need to be free-flowing (figure 3) until field operations are close to resumption. Therefore, the time frame following harvest and post-harvest field operations is one of the points when producers who utilize controlled drainage structures will go back and raise the water tables in their fields (figure 1). A higher water table allows for water that would otherwise be transported off the field via tile, to be largely retained in the field. The water table is raised in controlled drainage systems by adding boards on top of each other within the control structure.
Drainage Control Structure Images credit to Dr. Jane Frankenberger, Purdue University
Drainage Control Structures must be managed to maximize efficacy. Though raising the water table during the growing season is often of interest due to its potential for water storage (figure 2), raising the water table during the non-growing season is important for reducing the risk of subsurface nutrient loss, particularly nitrate leaching. In fact, if producers implement this practice through a cost share program, effective management of the structure is sometimes a requirement for participation and/or payment.
To view more general information on this practice and its measured efficacy, see https://agbmps.osu.edu/bmp/controlled-drainagedrainage-water-management-nrcs-554 . Further research on this practice in Ohio field conditions is currently being conducted.
To see more detailed guidance about utilizing this practice, see previous CORN article from 2015 by Dr. Larry Brown and Dr. Norman Fausey: https://agcrops.osu.edu/newsletter/corn-newsletter/2015-39/setting-outlet-water-level-drainage-water-management-structures .
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Certified Livestock Manager Webinars in December
The Ohio Pork Council, The Ohio State University Extension and The Ohio Department of Agriculture are hosting two Certified Livestock Manager Webinars in December. Individuals can obtain 2.0 CLM CE Credits for attending each webinar.
The first webinar is Wednesday, December 2nd from 10:00am to 12:00noon. Topics and speakers are Biosecurity Breaches by Andreia Arruda DVM, OSU Department of Veterinary Preventative Medicine; Livestock Mortality Composting Update by Dr Steven Moeller, OSU Swine Extension Specialist; and Worker Safety by Dr Dee Jepsen OSU Ag Safety and Health Leader.
The second webinar is Wednesday, December 9th from 10:00am to 12:00noon. Topics and speakers are Side-dressing Corn with Liquid Manure by Glen Arnold and Chris Shoup, OSU Extension; Edge of Field Results by Greg Labarge, OSU Extension Field Agronomist; Components of a Voluntary Nutrient Management Plan by Kip Studer, Ohio Department of Agriculture; and The H2Ohio Program by Terry Mescher, Ohio Department of Agriculture.
Each webinar is also approved for Indiana Continuing Certification Hours.
You must register separately for each webinar. The agendas and registration links to both webinars can be found at https://ohiopork.org/wp-content/uploads/2020/11/CLM-Agendas.pdf
Crop Observation and Recommendation Network
C.O.R.N. Newsletter is a summary of crop observations, related information, and appropriate recommendations for Ohio crop producers and industry. C.O.R.N. Newsletter is produced by the Ohio State University Extension Agronomy Team, state specialists at The Ohio State University and the Ohio Agricultural Research and Development Center (OARDC). C.O.R.N. Newsletter questions are directed to Extension and OARDC state specialists and associates at Ohio State.
Contributors
Disclaimer
The information presented here, along with any trade names used, is supplied with the understanding that no discrimination is intended and no endorsement is made by Ohio State University Extension is implied. Although every attempt is made to produce information that is complete, timely, and accurate, the pesticide user bears responsibility of consulting the pesticide label and adhering to those directions.
CFAES provides research and related educational programs to clientele on a nondiscriminatory basis. For an accessible format of this publication, visit cfaes.osu.edu/accessibility.