You know the Jack Links beef jerky add campaign “Messin’ with Sasquatch”? Well, Mother Nature is messin’ with corn pre herbicide applications. Upper twenties for temps yesterday morning were one thing, but around 20 this morning is another. Nearly all of the weeds that are up (and that’s not that many) will simply shut down for at least 24 hours after a cold shock like 20 degrees. First, check and see if the weeds are completely burned off - some tender broadleaf ones may have been cooked by these temps. Any burndown applications probably need to wait until tomorrow for weeds to wake up again. Straight residual applications with no glyphosate or burndown are still a go, if the sprayer lines are not frozen.