–by Dr. Jeff Whitworth and Dr. Holly Schwarting
Adult bean leaf beetles are present, but scarce, in soybean fields in north central Kansas as of 20 July. This indicates that the majority of the population is in the larval stage, feeding on soybean roots, and/or is pupating in the soil. There are also some garden webworms and a few painted lady, or thistle caterpillars, in some fields, but not enough to be of concern.
For more information on treatment thresholds and management options, please see the Soybean Insect Management Guide: https://www.bookstore.ksre.ksu.edu/pubs/MF743.pdf