WINONA, Minn. – Southeast Minnesota farmers have been alerted to watch for an invasive weed, Palmer amaranth, which has showed up in a soybean field in Winona County. The state Department of Agriculture said the field was treated with a herbicide, and no new plants were found. Even so, a single female Palmer amaranth plant typically produces 100,000 to 500,000 seeds. The weed can cause substantial yield losses, especially for soybeans and corn, the agency said.
Palmer amaranth: Threat to soy, corn