Vol. 12, Issue 10 (2023)

Author(s):
Manthesha HD, Mallikarjun Kenganal, Akash Bevanur and Ashwathanarayana DS

Abstract:
This study was conducted under natural epiphytotic conditions at Mangapura (14^o 68^’ N, 76^o 33^’ E) village of Kotturu taluk in Ballari district. The experiment site was selected having previous season onion crop with heavy twister incidence. The objectives were to know the efficacy of novel fungicides, biocontrol agents against onion twister disease development and yield and yield attributing characteristics of onion. The results indicated that treatment T₉ carbendazim 12% + mancozeb 63% 75 WP was significantly superior with least disease severity (16.59%) over the control (72.11%). Yield and yield attributing characteristics significantly superior in treatment application, T₉ carbendazim 12% + mancozeb 63% 75 WP, the maximum neck length, bulb diameter, bulb weight, total bulb yield per plot, total bulb yield per hectare recorded as 74.60 mm, 60.05 mm, 77.22 g, 56.56 kg/plot, 28.28 t/ha respectively with highest benefit cost ratio (5.74) over the control (54.73 mm, 29.14 mm, 31.72 g, 29.39 kg/plot, 14.70 t/ha and 3.03).