Host plant resistance in pigeonpea (Cajanus cajan (L.) Millsp.) genotypes for root rot disease caused by (Rhizoctonia bataticola (Taub.)Butler]
Abstract
A total of 25 pigeon pea genotypes along with susceptible check CO5 were evaluated for their resistance against root rot in the field under sick plot condition consecutively for three years in the experimental farm, Department of Pulses, Tamil Nadu Agricultural University, Coimbatore. Among these,the genotype viz., IPA 8F showed resistant reaction consistently for all the three years with the mean disease incidence of 8.0 per cent. The genotype IPA 15F was found to be moderately resistant which recorded the mean disease incidence of 14.9 per cent.Eighteen genotypes exhibited susceptible reaction and the five genotypes viz., BSMR 853, JKM 189,MAL 13 , WRGE 65, ICP 8863 and the variety CO5 used as the susceptible check recorded highly susceptible reaction .The resistance shown by the genotype IPA 8F against root rot was also confirmed in pot culture under artificial inoculation.The root rot disease resistant genotype IPA 8F can be used in crossing programme for developing root rot resistant pigeon pea variety
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