Vol. 11, Issue 2 (2022)

Author(s):
Sonali Abrol, SK Singh, Amritpal Mehta, Shafat Ahmad Ahanger, Umer Basu, Amrish Vaid, Ranbir Singh, AK Singh and VB Singh

Abstract:
Bipolaris oryzae (telemorph=Cochliobolus miyabeanus) causes brown spot in rice, which is known to cause significant quantitative and qualitative losses in rice crop production and in the country India, the disease has a long history. Under low input management, water stress, and direct planting conditions, the disease had been proved most hazardous. In this study, an extensive survey was conducted in Jammu division of Union Territory of Jammu and Kashmir, India for measurement of disease incidence on many of healthy and diseased leaves by the fungus and percentage of leaf infection was determined as the disease intensity during kharif 2018 and 2019. The mean disease incidence and intensity in Jammu division varied between 32.65 to 74.51 and 24.35 to 52.55 per cent, respectively. Total mean incidence and intensity of 58.70 and 36.93 per cent respectively, was recorded during kharif 2018. However, during kharif, 2019, comparable trend was observed in disease incidence and intensity though the average was slightly higher compared to previous year.