Vol. 10, Special Issue 3 (2021)

Author(s):
K Hariprasad and MG Palakshappa

Abstract:
Onion (Allium cepa L.) is the oldest known important vegetable crop mainly grow for commercial and domestic purpose. Several factors which lower the productivity of onion in India has been identified. Among the biotic factors hindering the production, purple blotch caused by Alternaria porri (Ellis) Ciferri is a major limiting factor in terms of yield. In order to know the amount of loss caused by the pathogen an intensive roving survey was carried out during kharif 2017 and 2018 in major onion growing areas of Karnataka. The districts surveyed, in both the years revealed the mean maximum severity in Gadag followed by Chitradurga district.