Chitin, Marigolds, Nitrogen, Sanitation and choice of plant varieties, through fallowing, crop rotation and soil solarization. These methods only reduce nematodes in the top foot of the soil


Microscopic, eel-like roundworms. They feed within plant roots most of their lives and live in the soil and feed on plant roots. They form galls that hamper the water- and nutrient-conducting abilities of the roots intake.