These are root knot nematodes. Root knot is a species of nematode that causes galls or swellings on plant roots. It restricts the uptake of nutrients from the root system to the foliage, resulting in a yellow and stunted plant. Root knot lives in the soil and can survive on a number of weed and vegetable crops. It is best controlled by planting a solid stand of marigolds (close enough for root systems to overlap) three months before the first killing frost of fall and/or planting cereal rye (Elbon) for a winter cover crop. Cereal rye should be shred and tilled into the soil 30 days before planting a spring crop.
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Why are the roots of my cantaloupe plants covered with knots and small swellings? I live in Texas.
Last Updated: January 11, 2012
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