Author(s):

Sunita Chandel, Kishore Khosla, AK Gupta and Praneet Chauhan

Abstract: The chrysanthemum plants especially of Calabria and Bonita group varieties showed rust symptoms for the first time which outbreaks in first week of April, 2018 in Seobagh, Kullu district of Himachal Pradesh during periodical disease surveys. The typical symptoms constituted as small pinhead flecks with blister-like round swellings having white crusty growth on the lower surface of the leaves and pale-green to sunken yellow spots on upper corresponding surface. The incidence ranged between 14.35- 47.36 % while the disease severity index found within 9.62 to 47.36 per cent. The pathogen identified as Puccinia horiana Henn. and required about 11-12 days for expression of the symptoms under pathogenicity test.

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