Screening of pigeonpea [Cajanus cajan (L.) Millsp.] against Tur Pod fly, Melanagromyza obtusa (Malloch) (Diptera: Agromyzidae) in long duration pigeonpea genotypes

Abstract

The pigeonpea was infested with the number of insect pests at various stage of crop growth. Out of which the incidence pattern of C. gibbosa was studied. The result of the investigation pertaining to the “Screening of pigeonpea [Cajanus cajan (L.) Millsp.] against Tur Pod fly, Melanagromyza obtusa (Malloch) (Diptera: Agromyzidae) in long duration Pigeonpea genotypes” was carried out in 2018-19 at the Agricultural Research Farm, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi. This insect was studied during reproductive phase of the crop during 2018-19. The very first presence of pod fly, Some insect populations were observed during the crop's reproductive period. Pod Fly's First Incidence, M. obtusa was observed in all genotypes during the 4th standard week of 2018-19. The various peak of the pod fly population was reported in different genotypes from the 6th standard week to the 11th standard week. The peak population of maggots was observed in the 11th standard week in the genotype MAL- 13 (AVT1), AVT1-704, AVT1-706 and AVT1-709 with population of (2.61 maggots/plant), (2.42 maggots/plant) and (2.40 maggots/plant), respectively. Pod fly's M. obtusa the damage ranged from 27.33 per cent in the genotype AVT2-904 to 51.00 per cent in cultivar AVT1-703 among all genotypes screened by the genotype. The percentage of grain damage caused by pod fly damage ranged from 12.68% in genotype AVT2-904 to 30.52% in genotype AVT2-907 Highest grain damage was recorded in genotype. In AVT1-704 the cereal yield of different genotypes was from 617kg / ha to 1434kg / ha with AVT1-708 genotype.