Description: Transparent parasite that measures about ¼" but can only be seen under a microscope
Timing of damage: V2 to V4
Type of damage: Short stubby roots and yellow stunted plants. Needle nematodes feed on root tips from the outside of the roots.
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: One to five nematodes per 100 cubic cm of soil prior to planting