http://www.jnkvv.nic.in/IPM%20project/nematode.html#Root_knot_nematode

Cultural Control of root knot nematode

• Deep summer ploughing 
• Crop rotations with non-host crop
• Use of resistant varieties 
• Soil solarization using clear thins polythene cover for 3-6 weeks in summer has been also found very effective. 
• Plough the main field twice in summer reduces nematode population and crop damage.
• If injury is high, soil fumigation may be needed.