Impact of weather factors on Pokkah boeng disease of sugarcane

To know the impact of weather factors on Pokkah boeng disease on Sugarcane in Bihar situation, an experiment was carried out at Pusa farm, Sugarcane Research Institute, RPCAU, Pusa during the crop season of 2017-18 and the observations were recorded at fortnight interval starting from May to November. The maximum (15.9%) incidence was recorded during first fortnight of July whereas, minimum (0.85%) was observed at second fortnight of November. However, its peak was observed during first fortnight of July to first fortnight of September. The minimum temperature (0.57*), relative humidity at 07 hrs. (0.62*) showed statistically significant, whereas, relative humidity at 14 hrs. (0.86**) and rainfall (0.74**) showed statistically significant and highly positive correlation with disease incidence. While, sunshine showed significant (-0.73**) but had negative correlation. Multiple regression equation in between per cent disease incidence and weather parameters showed all the weather parameters together governed 89.04 per cent towards disease incidence. It may be concluded that minimum temperature, relative humidity and rainfall were the congenial weather factors for the development of disease.