“One thing I’m doing in 2019 is documenting and tracking the weather,” Eller adds. “When did that weed break through? Was it raining? What was the impact on the residual?” Take note of what happened and do what you can to mitigate risk next year. “This year, I saw a lot of volunteer corn in soybeans,” Tharp says. “I think with the Xtend program guys didn’t come in with a grass killer. The concern is if you have corn rootworms, the volunteer corn can act as a bridge and make the pest a bigger problem [when the field is back in corn].” Note which weeds you saw throughout the season. Whether it’s volunteer corn, waterhemp or lambsquarter, you need to know what you’re up against before choosing herbicides and herbicide-tolerant trait packages. Ensure your herbicide plan will kill the weeds, preferably with two modes of action. The 2018 season can serve as a lesson for the 2019 season. Learn from mistakes and missteps to keep weed banks from building.