Submitted by krishnadubey on Wed, 19/05/2010 - 09:32
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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.