Webinar: Early-Season Weed Management In The Age Of Resistance

Palmer amaranth - pigweed - in soybean field. ©Debra L Ferguson Stock Photography

Palmer amaranth - pigweed - in soybean field. ©Debra L Ferguson Stock Photography

Click below to watch this comprehensive webinar on early-season weed control, featuring a presentation by Purdue University weed scientist Bryan Young.



The program was produced by the American Society of Agronomy and recorded in late February.

Young covers corn and soybeans plus touches on cotton and rice.

As he notes, early season weed management “sets the tone” for how weeds play out during the rest of the growing season. With multiple forms of resistance in many weed populations now, he emphasizes the need to “have a different mindset” when dealing with problem populations.

He focuses, in particular, on marestail, waterhemp and Palmer pigweed – three weed species that drive weed management decisions across a range of crops.

This discussion delves into a number of topics, including:

  • An understanding of herbicide sites of action and herbicide classes.
  • Strategies for early season control, covering preplant periods to the first post application.
  • Best management practices, including cultural practices, mechanical options and chemical approaches.
  • The possible role of cover crops and related strategies.
  • Understanding where cultivation may and may not fit.
  • The clear risk of trying to get by with a single spring application.
  • Aggressive management when resistance develops – how to react.
  • Residual herbicide timing and rates.
  • The importance of staying off the “herbicide treadmill” when planning weed management programs.

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