Vol. 12, Issue 5 (2023)

Author(s):
Lingaraj B, MK Naik, Yenjerappa ST, Ajithkumar K, Pampanna Y and Kisan B

Abstract:
Black rot of cabbage caused by Xanthomonas campestris pv. campestris (Xcc) is one of the most damaging disease that significantly reduces cabbage yields globally. The introduction of disease-resistant cabbage cultivars could be a simple and cost-efficient way to stop this deadly disease. We screened 28 cabbage cultivars under greenhouse conditions and 26 cultivars under field conditions for two seasons (Kharif 2021 and rabi 2021-22). None of the cultivars were immune or resistant to black rot in both greenhouse and field conditions. Under greenhouse conditions, only the Hari Rani cultivar recorded a moderately resistant reaction with a disease severity of 29.60 and a minimum AUDPC of 140.60 compared to the other cultivars. Whereas, six cultivars showed a moderately susceptible reaction, 11 were susceptible, and 10 were highly susceptible to black rot. During field screening of cultivars (Kharif 2021) identifies Hari Rani was a moderately resistant hybrid with 30.37 per cent of disease severity whereas during rabi 2021-22 none of them were recorded to be moderately resistant. The cultivar NEON was recorded highly susceptible to black rot during rabi 2021-22 season with a disease severity of 77.77 per cent whereas none of them showed a highly susceptible reaction during Kharif 2021.