Summary
Nematodes are tiny but complex unsegmented roundworms that are anatomically differentiated for feeding, digestion, locomotion, and reproduction. These small animals make important contributions to organic matter decomposition and to the food chain. Some species, however, are parasitic to plants or animals. This publication provides a description and information on biology, symptoms, yield reduction, crop management, sampling, and identification related to root-lesion nematodes in Pacific Northwest wheat cropping systems.