M. RESHAD ABDULRAHIMZAI*, N.C. VENKATESWARLU, K.V. HARI PRASAD and G . MOHAN NAIDU Department of Entomology, S.V. Agricultural College, ANGRAU, Tirupati – 517502, Chittor Dt., A.P., India

ABSTRACT

A field experiment was conducted to screen the blackgram genotypes at dry land farm, S.V. Agricultural College,Tirupati during rabi2018-19 for identification of resistance source for utilization in developing the resistant varieties of blackgram. Total 20 genotypes along with two susceptible checks viz., TBG-140 and LBG-645 were screed for Leaf Curl and Yellow Mosaic Virus (YMV). The results revealed that PU-31 genotype recorded lowest incidence of leaf curl followed by GBG-1 and found resistant with 1 scale rating. Sixteen genotypes viz., NDUK-15-222, SRI, IPU-2-43, TBG-130, TBG-104-1, TBG-129, Butta Minumu, OBG-32, KPU-12-213, Tuti Minumu, VBG 12-111-1, LBG-787, GKB-3, LBG-623 and LBG-685 were recorded to be moderately resistant with 2 scale rating. Whereas TU-40 and LBG-752 genotypes are found to be moderately susceptible with 3 scale rating. The genotype LBG-20 found susceptible with 4 scale rating followed by two susceptible checks viz., TBG-104 and LBG-645. In case of YMV among screened genotypes none of the entry recorded zero scale rating which comes under highly resistant. While 11 genotypes viz., PU-31, TBG-130, GBG-1, NDUK-15-222, LBG-787, LBG-623, IPU-2-43, Tuti Minumu, KPU-12-213, LBG-752 and TBG-129 were recorded less incidence of YMV and found to be resistant with 1 scale rating. The remaining 7 balckgram genotypes viz., Butta Minumu, GKB-3, TBG 104-1, VBG-12-111-1, LBG-20, LBG-685 and SRI recorded to be moderately resistant with 2 scale rate. But two genotypes viz., OBG-32 and TU-40 were found to be moderately susceptible with 3 scale rating along with two susceptible checks TBG-104 and LBG-645. The results indicated that none of the genotype found to be susceptible and highly susceptible during rabi 2018-19.

KEYWORDS:

Yellow Mosaic Virus (YMV), leaf curl, blackgram genotypes.