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Updated: May 6, 2025
The only common crops safe to use in such a rotation in the South are corn, oats, velvet beans, beggar weed, peanuts, and the Iron cowpea. The use of other varieties of cowpea than the Iron is particularly to be avoided, on account of the danger of stocking the land with root-knot. Fortunately, the disease is serious only in sandy or light soils.
The remedy in greenhouse culture is thorough soil sterilization. In the open field this is impracticable and recourse must be had to a rotation with immune crops, which will starve out the root-knot. It must now be borne in mind that the root-knot worm can attack cotton, cowpea, okra, melons and a very large number of other plants.
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