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Root knot nematode (Meloidogyne spp.) of Chickpea

Root knot nematode (Meloidogyne spp.) of Chickpea:

Identification

  • Root knot nematodes are microscopic roundworms, obligate endo-parasites.
  • The root-knot nematodes are widely distributed in nurseries and uplands or in well-drained soils all over India.

 

                          

Damage

  • Nematodes damage cotton by attacking the young tap and secondary roots. Their feeding stimulates the production of galls. 
  • These galls interfere with the roots ability to absorb  water and nutrients, and provide locations for other disease-producing organisms, such as fungi (Fusarium) or bacteria, to readily enter the plant.
  • Chlorosis, wilting, delay in flowering and fruit formation, reduction in plant size, yield etc. may be noted in above ground parts of infected plants
  • Distinct galls shaped like spindles, beads or clubs, develop around the position where nematode places  itself in the root of the plant.

Cultural Control

  • 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.

Chemical Control

  • The soil treatment of nursery beds with carbofuran @ 0.3 g a.i./ sq.m. 
  • Root dip treatment with systematic pesticides and hot water treatment of dormant infected planting material before transplanting in the main field is also recommended


 

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Informative post

Thanks for sharing the information.