Plant-parasitic nematodes can be a pest concern for corn. Current corn nematode management options include seed-treatment and soil-applied nematicides; both are implemented at the time of planting. There are no effective management strategies to use after the corn crop has been planted, however effective scouting is the foundation to a successful, integrated nematode management program.
Iowa State University
Tylka, Gregory L., "Early Season Corn Nematode Scouting" (2010). Integrated Crop Management News. 444.