ST PAUL, Minn.-- The generally-agreed-upon treatment threshold for soybean aphid is 250 aphids per plant.  But with soybean values running so high, do these recommendations still apply?

Dr. Kelley Tilmon, Soybean Extension Specialist at South Dakota State University, explores this question in a recent ‘Focus on Soybean’ webcast titled, “Soybean Aphid: Do Higher Crop Values Mean a Lower Threshold?

This presentation will help consultants, growers, and other practitioners in and around the North Central region to address the question of whether the economic threshold for treatment of soybean aphid should be lowered or not in light of current high crop values.

This presentation will also help viewers will learn more about…

  • The difference between an economic injury level and an economic threshold
  • How the original soybean aphid threshold recommendations were determined
  • How the information from those studies relates to current threshold recommendations

This 20-minute presentation is open access through September 30, 2013.  Viewers can also opt to see a 5-minute executive summary version of this presentation.  This shorter executive summary version is permanently open access courtesy of the United Soybean Board.

Other Focus on Soybean presentations can be viewed at

Focus on Soybean is a publication of the Plant Management Network.  To get the most out of the Plant Management Network’s full line of resources, please sign up for PMN’s free electronic newsletter, PMN Update.

The Plant Management Network ( is a nonprofit online publisher whose mission is to enhance the health, management, and production of agricultural and horticultural crops. It achieves this mission through applied, science-based resources, like Focus on Soybean.

PMN partners with the United Soybean Board, as well as more than 80 other organizations, which include universities, nonprofits, and agribusinesses.