Author(s): Kavana GB, Seetharamu GK, Rajiv Kumar, Satish D, Amreen Taj, Amruta S Bhat and Venugopalan R

Abstract: During the summer and winter leaf blight and leaf rust was noticed on chrysanthemum The disease, which was identified as caused by Alternaria alternata and Puccinia horiana respectively, which was widely spread and led to serious damage for the production sector of this crop. Therefore, a study was conducted to better understand how serious these causal organisms will cause damage. From the present investigation, results revealed that, no symptoms of leaf blight was observed in cv. HCC-1, cv. Arka Kirti and cv. Punjab Gold however, maximum disease incidence was recorded in cv. Marigold (100%) and cv. Rajat (100%) followed by the cv. N-9 (85.71%). Percent disease index at vegetative phase was maximum in cv. Rajat (44.28%), percent disease index was zero for the cv. HCC-1, HYDC-7, Arka Kirti and Punjab Gold. Percent disease index at flowering stage was maximum in the cv. Arka Chandrika (94.28%) and it was minimum in cv. Arka Kirti (5.71%). Lowest disease incidence for leaf rust was recorded by the cv. HCC-1 (14.28%) whereas cv. Marigold recorded the highest disease incidence (100%) followed by cv. White Star (85.71%) and cv. Corcum Small (85.71%). Lowest Percent disease index was recorded by the cv. Arka Kirti (11.42%) during vegetative phase whereas highest was recorded by the cv. Marigold (60.00%). During flowering phase lowest Percent disease index was recorded by the cv. Arka Kirti (28.57%), whereas it was maximum in cv. Marigold (97.14%).

DOI: 10.33545/26174693.2024.v8.i6e.1337