Managing Herbicide-Resistant Weeds in Soybean

October 12, 2022, 1:05 pm | Alena Whitaker

AMES, Iowa – The Iowa Learning Farms conservation webinar taking place Oct. 19 at noon CDT will feature Prashant Jha, professor and extension weed specialist at Iowa State University. Jha’s research is focused on developing precision and sustainable weed management solutions in corn and soybean production systems. His work includes strategies to mitigate herbicide-resistant weeds that affect soybean crop performance.

Iowa Learning Farms is an Iowa State University Extension and Outreach conservation and water quality education program.

Prashant JhaIn the webinar, “Cereal Rye Cover Crop: An Ecological Tactic to Manage Herbicide-Resistant Weed Seed Banks in Soybean,” Jha will discuss methods for optimizing the performance of soybean crops through variables including cover crop termination timing, soybean row spacing and herbicide interactions which can manage herbicide-resistant weeds such as waterhemp and horseweed (marestail.) He will also introduce strategies to mitigate herbicide-resistant weeds through the application of multiple practices including cereal rye cover crops.

“Soybean producers in Iowa are facing increasing issues with herbicide-resistant weeds such as waterhemp – which has a demonstrated resistance to six or seven different herbicide groups,” said Jha. “Maximizing soybean sustainability and profitability with the current series of herbicide tools will require the adoption of Integrated Weed Management strategies. Cereal rye cover crops are one additional layer of mitigation that can be beneficial in the war against herbicide-resistant weeds while reducing reliance on herbicides. I hope participants in this session will come away with some new ideas on how to best utilize cover crops for these purposes.”

Participants in Iowa Learning Farms Conservation Webinars are encouraged to ask questions of the presenters. People from all backgrounds and areas of interest are encouraged to join.

Webinar access instructions

To participate in the live webinar, shortly before noon CDT Oct. 19:

The webinar will also be recorded and archived on the ILF website, so that it can be watched at any time. Archived webinars are available online.

A Certified Crop Adviser board-approved continuing education unit has been applied for. Those who participate in the live webinar are eligible. Information about how to apply to receive the CEU will be provided at the end of the live webinar.

Upcoming webinars in the series

  • Oct. 26: Matt Nowatzke, Iowa State University.
  • Nov. 2: Adam Schnieders, Iowa Department of Natural Resources.
  • Nov. 19: John McMaine, South Dakota State University.
  • Nov. 16: Sarah Noggle, The Ohio State University.
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