Note: The following two videos have been produced by UMN Extension Educators for Crops who are based in Rochester, MN. The message regarding preemerge herbicides is valuable. The two videos presented here provide a review of herbicide performance in corn, the first from May 27, 2017; the second is a follow-up posted June 8, 2017. I hope you find them informative when considering your own preemerge and post emerge herbicide program planning. Phillip Glogoza, UMN Extension Educator for Crops Extension Regional Office - Moorhead by Ryan Miller and Lisa Behnken Last week, we shared a video on Spring herbicide activity concerns due to cool and wet conditions following preemergent corn herbicide applications ( Spring herbicide activity concerns -- May 27, 2017 ). In the video, we noted that weeds were coming through and wondered if the preemergent herbicides that had been applied would do their job. We are back in the research plots in Rochester and checking-in to see how t