- Symptoms of nematodes in plants are similar to some plant diseases. Send soil samples to your local extension service to confirm that plant-eating nematodes are in the soil. Otherwise, planting winter rye will be useless.
- Winter rye helps control nematodes in two ways. Nematodes become trapped in the thick roots. And when rye decomposes, it releases acids into the soil that can kill nematodes.
- Winter rye should be planted in the late fall to help control nematodes, according to Texas A & M University. By winter it can grow to 15 inches high. Cut the grass and leave the trimmings on the garden to help kill nematodes.
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