Corn Weeds

Palmer amaranth has shown up in a few more places in Ohio this summer at a range of infestation levels, and waterhemp has also become more prevalent. Newly discovered Palmer infestations in some fields were too high to be remediated by walking fields and removing plants, although there is still some potential to mow down weeds and soybeans to prevent seed production and even bigger problems next year. Infestation level in a few other fields was low enough to allow removal of Palmer amaranth plants by a crew of concerned people.

Replanting a corn field due to weather-related stand problems usually involves killing the first planting, which otherwise really just turns into a weed.  A recent article by Dr. Aaron Hager in the U.