Horseweed (Erigeron canadensis), also known as marestail, is a troublesome weed commonly found in soybean crops in the mid-Atlantic region. This weed produces up to 200,000 seeds per plant, has become resistant to a variety of herbicides, and has a large germination window (Pittman, 2021). It is now more frequently encountered due to the increased implementation of no-till farming (Chahal & Jhala, 2019). Horseweed at 9 to 20 plants per square foot can result in a decrease in soybean yield by 71% to 98% (Bruce & Kells, 1990).