If there’s one thing that Iowa farmers can count on, it’s that weeds will return every growing season and threaten to crowd out crops in the field.

“It’s a weed’s job to occupy disturbed soil,” explains Meaghan Anderson, central Iowa field agronomist for Iowa State University (ISU) Extension and Outreach.

"It’s why weeds show up in a week or two in grass. It’s why they show up in crop fields,"...