Old and new summer soybean insects

Welcome to the Fourth IPM Podcast for Field Crops – 2019

Welcome to the fourth IPM Podcast for Field Crops, 2019– this Podcast is sponsored by the UMN Extension Integrated Pest Management (IPM) Program. In this week’s podcast, we feature Dr. Robert Koch, Associate Professor and Extension Entomologist for soybean at the University of Minnesota. Dr. Koch provides an overview of summer insect pests to be on the look-out for in July and August, primarily soybean aphid and new Minnesota pest, soybean gall midge.

Dr. Koch discusses the population growth of soybean aphid so far this year and the continued use of the 250-aphid treatment threshold to prevent aphid populations from reaching economically levels. Ongoing insecticide resistance issues and new insecticide options are also reviewed.

Soybean aphid nymphs and winged adults feeding on a soybean leaf. Photo: Anthony Hanson

Soybean gall midge (SGM) is a new soybean pest in MN, and has been causing significant damage in Rock County in southwestern MN in 2018, and now in 2019. Koch describes what to look for when determining if soybean gall midge is present in a field, the type of damage it causes, how to respond if SGM is found and current research in to possible control tactics.

Gall midge larvae and damage under soybean stem epidermis, Rock County, MN, 2018. Photo: Bruce Potter

This podcast was hosted by Dr. Anthony Hanson, Extension Post-Doctoral Associate in the Dept. of Entomology. The purpose of the IPM podcasts is to alert Growers, Ag Professionals and Educators about emerging pest concerns on Minnesota field crops. We also review recent pest trends and research updates.

Click here to listen to the podcast.


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For recent Corn and Soybean IPM updates, see MN Crop News for Corn & Soybeans and for IPM Program updates, visit the UMN Extension IPM website.