Screening of Chilli germplasms for Resistance Against Soil Borne Pathogen Ralstonia solanacearum causing Bacterial Wilt

Author: Thilak J.C., Ajjappalavara P.S., Ganiger V.M., Sandhyarani N., Ramangouda S.H., Abdul Kareem M. and Vinutha D.B.

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Abstract

Bacterial wilt caused by Ralstonia solanacearum is one of the most serious soil borne disease causing yield loss upto 30-100% in Solanaceous vegetables. Several methods have been tried to control bacterial wilt but they are ineffective and not economically feasible. This study was aimed to develop resistant lines against bacterial wilt. Three week old chilli seedlings of 50 accessions each, were root dipped with bacterial suspension and screened against Ralstonia solanacearum by transplanting seedlings into sick plot at Horticultural Research and Extension Centre (HREC), Devihosur, Haveri, Karnataka, during summer 2019-20. Out of which, none of the varieties/accessions found immune or highly susceptible to bacterial wilt incited by Ralstonia solanacearum. Only 4 varieties viz., Ujwala, Anugraha, Khandari and Utkal Ava showed 15% wilt incidence and were categorized as resistant. Utkal Rasmi, KDC-1, DCA-21, 20 indigenous collections and 2 exotic collections revealed 21-40% wilt incidence were regarded as moderately resistant. Byadgi Kaddi, Byadgi Dabbi and Pusa Jwala were grouped under susceptible lines (61-80%) and rest of the varieties which showed percent wilt incidence of 41-60% were found to be moderately susceptible. On the basis of present investigation, it is concluded that chilli accessions showing resistant to moderately resistance reaction to bacterial wilt can be further utilized for hybridization and crop improvement programme to develop resistance hybrids against bacterial wilt.

Keywords

Bacterial wilt resistance, Ralstonia solanacearum, Chilli, Screening

Conclusion

On the basis of present investigation, it is concluded that chilli accessions showing resistant to moderately resistance reaction to bacterial wilt can be further utilized for hybridization and crop improvement programme to develop resistance hybrids against bacterial wilt.

References

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How to cite this article

Thilak J.C., Ajjappalavara P.S., Ganiger V.M., Sandhyarani N., Ramangouda S.H., Abdul Kareem M. and Vinutha D.B. (2023). Screening of Chilli germplasms for Resistance Against Soil Borne Pathogen Ralstonia solanacearum causing Bacterial Wilt. Biological Forum – An International Journal, 15(9): 913-918.