Peanut is a nonhost to cotton root-knot nematode. Use resistant or tolerant varieties. Most commercial cotton varieties have some tolerance to cotton root-knot nematodes. But few if any commercial varieties are completely immune to cotton root-knot nematodes. Plant tolerant cotton varieties in fields where cotton root-knot nematodes are found.
Crop rotation is effective in managing cotton root-knot nematodes.
Certain grass crops or pastures, grain sorghum, and peanut can effectively reduce cotton root-knot after a 2 to 3 year period. If corn is used in a rotation plan, make sure the hybrid has some resistance to root-knot nematodes. Use nematicides in fields where root-knot nematodes cannot be managed by tolerant cotton varieties or rotation. Certain nematicides are cost effective in heavily root-knot infested fields. Land fallow is also effective in reducing root-knot populations, but weeds must be controlled.