Screening for resistance against Tur Pod bug, Clavigralla gibbosa (Spinola) in long duration Pigeonpea genotypes

Abstract

The present experiment was conducted during Kharif 2017-18 at the Entomological Research Field, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi. In this field trial 9 long duration Pigeonpea genotypes were screened for resistance against Tur Pod bug, Clavigralla gibbosa (Spinola). The first incidence of pod bug was observed in the 4th standard week in all genotypes and the population persisted up to 12th standard week in all the genotypes. The peak population of pod bug irrespective of the genotype was recorded in 10th standard week. The mean populations of pod bug on different genotypes ranged from 1.84 pod bugs/plant in CRG 2015-007 to 4.40 bugs/plant in Bahar (Check). The per cent pod damage due to pod bug significantly varied from 14.33 per cent in genotype CRG 2015-007 to 29.00 per cent in genotype Bahar. The highest grain damage by pod bug was also seen in Bahar (8.97%) while the lowest grain damage was observed in CRG 2015-007 (3.85%). The grain yield of different genotypes also differed significantly and ranged from 916 kg/ha in the genotype Bahar to 1500 kg/ha in JKM 189.