Vol. 12, Issue 5 (2023)

Author(s):
KT Arunakumara, C Satyanarayana and Siddanna Thoke

Abstract:
Among 10 fungicides,10 botanicals and 8 bio-agents were evaluated in In vitro condition against Alternaria porri, 0.1% Azoxystrobin-23 EC, Tebuconazole-25 EC, Mancozeb-75 WP, Allium sativum (15%) and Trichoderma harzianum recorded the maximum inhibition of mycelial growth of Alternaria porri. The field evaluation of different fungicides and botanicals during Rabi 2020-21 indicated that 0.1% Tebuconazole-25 EC was significantly effective in reducing the disease intensity by recording a Percent Disease Index of 20.00 and yield of 86.00 q/ha. 0.1% Azoxystrobin-23 EC, 0.2% Mancozeb-75 WP, 0.2% Propineb-50 WP, 0.1% Hexaconazole-5 EC and Allium sativum cloves extract were next best treatments in reducing the disease intensity by recording a PDI of 21.11, 23.33, 24.44, 27.40 and 42.22 and yield of 83.94 q/ha, 82.44 q/ha, 79.37 q/ha, 76.43 q/ha and 66.60 q/ha respectively. Again during Rabi 2021-22 among fungicides 0.1% Azoxystrobin-23 EC was significantly effective in reducing the disease intensity by recording a PDI of 20.74 and yield of 84.20 q/ha. 0.1% Tebuconazole-25 EC, 0.2% Mancozeb-75 WP, 0.2% Propineb-50 WP, 0.1% Hexaconazole-5 EC and Allium sativum cloves extract were next best treatments found effective in reducing the disease intensity by recording a PDI of 22.22, 23.33, 25.18, 26.54 and 43.33 and yield of 84.50 q/ha, 82.96 q/ha, 79.40 q/ha, 78.67 q/ha and 68.20 q/ha respectively.