Abstract :
Gangetic alluvial region is the most fertile part of West Bengal where majority of farmers’ livelihood is commercial vegetable production. Vegetable brassica such as cabbage, cauliflower and radish occupies 18 per cent of total vegetable cultivation in West Bengal and mainly cultivated in Nadia, Mursidabad, Purulia, North 24 praganas and South 24 praganas districts.Damping off, wire stem and root rot are the major diseases caused by Rhizoctonia solani in these districts. Different soil edaphic factors like soil temperature, soil pH, available carbon, available nitrogen etc. play a major role in survival and spread of Rhizoctonia solani and hence, this study was undertaken. The survey reveals that among different soil edaphic properties; soil pH, organic C and available N (kg/ha) are the important determinants of disease conduciveness and suppressiveness. Soil pH is the most important determining factor for disease development. The disease incidence is negatively correlated with the pH.
Keyword :
Vegetable brassica, Rhizoctonia solani, Wire stem, soil pH, Available carbon