August 18, 2020: Flattened corn near Keystone, Benton County.
Last year’s derecho sowed the seeds of a weed that is Roundup Ready, extremely visible, and scattered across most of Iowa.
Volunteer corn is going to be all around this season, as unharvested corn takes root in what this year will usually be soybean fields. Iowa Public Radio has more. (There was a Spokesman article too, but that’s paywalled.) Kernels and ears left on thousands of acres will pop up without a care.
Control of volunteer corn requires a non-Roundup herbicide, as explained in this page from ISU Extension.