The experiment on “Effect of liquid jeevamrutha on growth yield and quality of China aster (Callistephus chinensis [L.] Nees.)” was carried at Department of Floriculture and Landscape Architecture, K. R. C. College of Horticulture, Arabhavi. Among all the treatments, application of liquid jeevamrutha at 1500 liter per hectare at an interval of 7 days (D3F1) was recorded significantly higher plant height (47.98 cm and 58.78 cm at 60 and 90 DAT, respectively), plant spread (N-S) i.e., 17.90 26.35 and 31.31 cm at 60 and 90 DAT, respectively, plant spread (E-W) i.e., 27.10 and 30.35 cm at 60 and 90 DAT, respectively, number of primary branches (7.45 and 10.28 at 60 and 90 DAT, respectively), number of flowers per plant (38.42), flower yield (111.39 g/plant, 5.41 kg/plot and 8.06 t/ha, respectively), flower diameter (5.76 cm), individual flower weight (3.04 g), shelf life (3.43 days) and vase life (8.79 days)  in pooled data.

Leaf spot disease caused by Alternaria alternata (Fr.) Keissler is a threat of China aster cultivation and is capable of causing yield losses in all production regions. The experiment was undertaken to screen genotypes and F1 hybrids which would be helpful in developing Alternaria leaf spot resistance varieties in later years. AAC-1 was found to be resistant against Alternaria leaf spot in both field and control conditions. In natural disease pressure, Arka Kamini, Arka Shashank and Arka Poornima recorded to be moderately susceptible, susceptible and highly susceptible to Alternaria leaf spot, respectively. However, in artificially inoculated condition, Arka Kamini showed susceptible reaction. Among F1 hybrids, AAC-1 x Arka Kamini and Arka Kamini x AAC-1 showed moderately resistant reaction; AAC-1 x Arka Poornima, AAC-1 x Arka Shashank, Arka Poornima x AAC-1, Arka Shashank x AAC-1 showed moderately susceptible disease reaction for Alternaria leaf spot.