A comprehensive study on symptoms, occurrence and intensity of leaf blight disease of Ocimum sanctum in and adjoining areas of 24 Parganas(N), West Bengal

Subhankar Banerjee; Swapan Kr Ghosh

Volume : V, Issue : VIII, August - 2015

A comprehensive study on symptoms, occurrence and intensity of leaf blight disease of Ocimum sanctum in and adjoining areas of 24 Parganas(N), West Bengal

Subhankar Banerjee, Swapan Kr Ghosh

Abstract :

A destructive leaf blight disease of Ocimum sanctum L. is found in West Bengal. It’s causal organism was isolated and phenotypically identified as Alternaria sp. Once in a week survey for two consecutive years of 2013 and 2014 in ten places of 24 Parganas(N) district,West Bengal establishes the presence of disease in all ten places. PDI was recorded by monitoring it’s cultivation at 4 selected areas of and adjoining North 24 Parganas, West Bengal for the same time period.Maximum PDI (44.61%–76.66%) was between July to September and minimum (12.30– 37.50 %) was recorded during December – January in all four studied areas. There was not only any significant report of fungal disease on Ocimum sanctum but also this is the first approach to the study of disease intensity of leaf blight disease of Ocimum sanctum all over the world. So our work is an entirely new one in this regard.