Status and Distribution of Alternaria Blight Associated with Rapeseed-Mustard in Himachal Pradesh

Abstract

Survey across different production fields of rapeseed-mustard in seven districts of Himachal Pradesh was carried out to determine the extent of disease incidence and severity of Alternaria blight caused by Alternaria brassicae. The disease incidence and severity remained low to moderate across different areas of Himachal Pradesh with disease incidence of 14 to 42 per cent and disease severity between 10 to 36 per cent. Maximum disease was recorded from Una district having the mean incidence and severity of 34.3 and 26.8 per cent followed by Kangra district with high incidence (42%) in Jamanabad and Samloti locations.