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Field demonstration trials on efficacy of Pseudomonas fluorescens and Azotobacter sp. against Meloidogyne incognita were carried out in six different farmers’ fields viz., Namtemera, Kakodunga, Naromari and Misimiati in Golaghat district, Kamalabari in Majuli district and Dichangmukh in Sivasagar district of Assam that were infested by root knot nematode, Meloidogyne incognita. The farmers of each location were educated with the demonstration technique of enrichment and soil application methods of P. fluorescens and Azotobacter sp. enriched in enriched compost @ 1% (1ton enriched compost /ha) on the field. The demonstrated technique i.e. P. fluorescens and Azotobacter sp. enriched in enriched compost @ 1% (1ton enriched compost /ha) was compared with existing farmers technique as untreated control. Analyzed data reveal that, application of P. fluorescens and Azotobacter sp. enriched in enriched compost was found to be best in increasing the plant growth parameters viz., shoot and root length (cm), number of nodules per root system and yield (q/ha) of black gram and decreasing nematode infection (number of galls and egg masses) and multiplication (nematode population in soil) than untreated control. However, the yield of black gram in demonstration fields was ranged from 6.15-8.80q/ha whereas in untreated control it ranged from 4.50-5.70 q/ha. | Demonstration on efficacy of Pseudomonas fluorescens and Azotobacter sp. against Meloiodgyne incognita in farmers field of Assam
