Occasionally, we’ve seen issues where fall armyworms get started on weedy grasses in soybean fields then move onto soybeans plants, especially once the grass is killed with herbicide. I’ve seen less of this in recent years, probably because the presence of Palmer pigweed is forcing folks to be more proactive on their weed control programs. Normally, this issue rears its head in late July or later, but fall armyworms seem to be making an early showing based on recent events in Mississippi and Arkansas. There is no point reinventing the wheel. Dr. Angus Catchot, my counterpart in Mississippi, recently wrote a good article addressing this issue (linked below).