Description: Parasite that is visible only under a microscope. Feeds from inside and outside the corn roots.
Timing of damage: Early spring but can be active throughout the season
Type of damage: Plants are yellow and stunted, and roots are stubby and short. These nematodes cause the most damage in sandy soils.
Scouting: A month after planting and before soils warm up, take a sample of the roots and soil. Place root with soil ball in a plastic bag and send to a nematology lab for testing.
Economic threshold: None established.