Field screening and evaluation of long duration pigeonpea genotypes against the infestation of pod bug

Abstract

Eighteen promising long duration pigeonpea genotypes were screened for their reaction against pod bug at Agriculture Research farm, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi during kharif 2013-14 and 2014-15. The first incidence of pod bug, Clavigralla gibbosa was observed in 4th standard week during both the year in all genotype. The peak of population of pod bug was recorded from 12th to 13th standard week in different genotypes. The results revealed that the incidence of pod bug was significantly highest in IPA 7-10 i.e. (4.68 bug/plant) followed by MA-6 (4.44 bug/ plant), NDA 13-1 (3.98 bug/plant), and lowest in genotype i.e. KA 12-2 (1.96 bug/plant), followed by KA 12-2 (2.06 bug/plant), BAHAR (2.17 bug/plant) during 2013-14 and during 2014-15, the mean population of Pod bug was recorded highest in IPA 7-10 i.e. (4.45 bug/ plant) followed by NDA 13-1 (4.06 bug/plant), MA-6 (4.04 bug/plant), and lowest in genotype i.e. KA 12-2 (1.82 bug/plant), followed by KA 12-2 (1.95 bug/plant), BAHAR (2.06 bug/plant). The per cent pod damage caused by Pod bug on different genotypes observed significantly during both the year. During 2013-14, the highest pod damage by pod bug were seen in IPA 7-10 i.e. (39.67%) followed by MA 6 (37.33%), NDA 13-1 (36.67%) and lowest pod damage observed in KA 12-2 (19.67%) followed by KA 12-3 (22%), BAHAR (24.33%) and during 2014-15 the highest pod damage by pod bug were seen in IPA 7-10 i.e. (35%) followed by MA 6 (34%), NDA 13-1 (32.67%) and lowest pod damage observed in KA 12-2 (16.33%) followed by KA 12-3 (18%), BAHAR (18.33%). The per cent grain damage caused by Pod bug on different genotypes observed significantly during both the year. During 2013-14 the highest grain damage by pod bug were seen in IPA 7-10 i.e. (22.13%) followed by MA 6 (15.95%), NDA 13-1 (15.38%) and lowest grain damage observed in KA 12-2 (10.13%) followed by KA 12-3 (10.58%), BAHAR (19.20%) and during 2014-15 the highest grain damage by pod bug were seen in IPA 7-10 i.e. (20.63%) followed by MA 6 (14.45%), NDA 13-1 (13.43%) and lowest grain damage observed in KA 12-2 (6.98%) followed by KA 12-3 (6.98%), BAHAR (7.91%). The grain yield of different genotype differed significantly during both the year and ranged from 1027 kg/ha in the genotype IPA 7-10 to 1960 kg/ha in KA 12-2 during 2013-14 and 819 kg/ha in the genotype IPA 7-10 to 1785 kg/ha in the genotype KA 12-2 during 2014-15. © 2015, Journal of Pure and Applied Microbiology. All rights reserved.