Nematodes complete their life cycle in 20 -25 days in the roots of the host plants. They invade at any portion of the root causing severe root damage resulting in poor water and mineral uptake by the plant.
- Usage of biological agents such as Paecilomyces a bionematicide, Trichoderma Viridi and VAM are recommended to control nematodes.
- Use of press mud @ 2 tons/acre in the field and application of Neem cake 500 gms per plant helps in suppressing the nematode population.
- Crop rotation with Paddy, Sugarcane, green gram, sunhemp, cotton Etc., helps inreducing nematode population.
- Growing antagonistic plants namely Tagets erecta (Tamil: Sendu malli, Sevanthi and Thulukka Samanthi) Crotalaria juncea (Sunhemp) as an inter crop in the field drastically reduces the nematode population.
Remedial Measures suggested:
- Soil and phytosanitory management.
- Formation of bund around the plant. Apply adequate quantity of peat soil. Ensure that there should not be any water stagnation around the plant.
- Apply well-composted cow dung 4 Kgs + 250 gms of Neem cake + 250 gms of Pungan cake around the basin.
- Mix Pseudomonus 25 gms/plant + Trichoderma Viridi 25 gms/plant + Paecilomyces 25 gms/plant and apply it around the root zone of the plant.
- Spread leaf mulch around the basin.
- Growing Sunhemp as intercrop.
- Prepare 1 Litre Pseudomonus + ½ Kg Starter + 200Litres of water and mix it daily for 5- 6 days for fermentation.
- Prepare P.G.P.R 1 Kg + ½ Kg Starter + 200Litres of water and mix it daily for 5- 6 days for fermentation.
- Take Sl.No.1 – 1 Litre and Sl.No.2 – 1 Litre and apply around the root zone of the affected plant every 15 days. Repeat the same for 3-4 times.
- Neem Kernals 5 Kg crushed and choked in 5 Litres of water for 2 days. From the above prepared solution take 2 ½ litres and mix it in 400 Litres of water and add 1 Kg Beauvarium + 1 Kg Verticillium + 1 Kg Jaggery stir them well and spray it (Foliar) on the plant.
Our friend strictly followed all the above suggestions, endured the agony of waiting for 3 months to see the final encouraging results.
Yellowing of leaves stopped, fresh green shoots appeared, root rot disappeared, consecutive soil test revealed a significant reduction of nematode population, and finally with a smile on his face, our friend who used to criticize organic cultivation practices, is now an organic farmer.