Prevalence of rhizome rot complex in major ginger growing regions of Karnataka

Abstract

Rhizome rot complex is one of the most destructive and economically important diseases of ginger. In this study,a roving survey was conducted during kharif - 2021 to assess the disease incidence of rhizome rot complex in major gingergrowing parts of Karnataka,viz., Haveri, Shivamogga and UttaraKannada districts. Among the various taluk as surveyed,the maximum disease incidence (35.99%) was recorded in Sirsi taluk of Uttara Kannada district and the minimum of21.50 per cent was observed in Byadagi taluk of Haveri district. Among the surveyed districts, the highest incidence of31.62 per cent was observed in Uttara Kannada district followed by Shivamogga district (28.81%) and the minimumincidence was observed in Haveri district (25.45%). Further, from the survey it was revealed that, selection of improperplanting material, poor drainage of fields, mono cropping, lack of crop rotation, indiscriminate use of fertilizers and lack ofknowledge on managing the disease could be the possible reasons for higher occurrence of rhizomerot complex in gingergrowing regions of Karnataka.