Survey on Panama Wilt Disease (Fusarium oxysporum f.sp. cubense) of Banana in Mysuru, Mandya and Chamarajanagar Districts of Karnataka

Abstract

The roving survey was carried to find out the prevalence of Fusarium wilt disease incidence in banana cultivars during 2016-17 to 2017-18 in different places of Mysuru, Mandya and Chamarajanagar districts of Karnataka. During the survey, the average disease incidence of Fusarium wilt was ranged from 6.54 to 25.47%. The mean disease incidence in Mysuru district was 15.00% during 2016-17 and 25.47% in 2017-18, Mandya district recorded the average disease incidence of 6.54% during 2016-17 and 7.88% in 2017-18 and Chamarajanagar district showed the average disease incidence of 13.24% during 2016-17 and 10.56% in 2017-18. Among districts, Mysuru recorded the highest average disease incidence followed by Chamarajanagar. While the severe form of disease was observed in the cultivar Nanjanagudu Rasabale (60.57%) in Krishnapura village of Nanjangud taluk. However, among all the locations surveyed the highest disease incidence recorded was 60.57 % and lowest incidence was 0.00%. The maximum wilt incidence (%) was recorded in cultivar Nanjangud Rasabale followed by Ney Poovan 28.00 %. Nanjangud taluk of Mysuru district reported severe incidence level of panama wilt disease when compared to other taluks and districts. The wilt incidence (%) was higher during 2017-18 showing the consecutive increase in the disease incidence compare to 2016-17. The increased wilt incidence (%) was due to virulence of the pathogen and susceptibility of the cultivars.