Pathogenicity of Rhizoctonia bataticola isolates Collected from Southern India and Screening of Groundnut genotypes for Resistance to dry Root Rot in Field conditions

Author: Pamala Prince Jayasimha, R. Sarada Jayalakshmi, K. Vemana, G. Mohan Naidu, Rajeev K. Varshney and Hari Kishan Sudini*

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Abstract

Groundnut is an economic important edible oilseed crop and suffers from seed, soil, and foliar diseases. Rhizoctonia bataticola is a soil-borne fungus causing dry root rot disease in groundnut and it survives in the soil for many years that resulting in disease mitigation difficulty. Managing dry root rot in groundnut through an integrated approach has been suggested, and the use of resistant varieties is one of the economical methods. The present study was conducted to know the virulent isolate of R. bataticola through pathogenicity test and screening of groundnut genotypes against dry root rot at Agricultural Research Station, Kadiri under sick soil conditions. The results revealed that the highest disease incidence (100%) was observed in isolate GRb 52 at 60 days after showing. Out of 61 genotypes, eight genotypes (ICGV 06146, ICGV 06424, ICGV 15070, ICGV 15080, ICGV 86325, K - 2307, KDG 123 and KDG 128) were showed resistant reaction (1-10%), 35 genotypes were found moderately resi

Keywords

Groundnut, Rhizoctonia bataticola, Pathogenicity, Screening, Genotypes, Disease incidence.