Pigenonpea Cajanus cajan (L.) Millsp. Entries Selection against Pod Fly Melanagromyza obtusa Mulloch
Shanmugam, P.S.*
Dept. of Pulses, Centre for Plant Breeding & Genetics, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu (641 003), India
Dept. of Agricultural Entomology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu (641 003), India
S. Geetha
Dept. of Pulses, Centre for Plant Breeding & Genetics, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu (641 003), India
S. Anitta Fanish
Dept. of Pulses, Centre for Plant Breeding & Genetics, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu (641 003), India
L. Karthiba
Dept. of Pulses, Centre for Plant Breeding & Genetics, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu (641 003), India
S. Backiyaraj
Dept. of Agricultural Entomology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu (641 003), India
V. Somasundaram
Dept. of Agricultural Entomology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu (641 003), India
DOI: https://doi.org/10.54083/PHA/2.3.2024/109-114
Keywords: Breeding programme, Pigeonpea, Pod fly, Screening, Tolerant entries
Abstract
Pigeonpea, Cajanus cajan (L.) Millsp., is one of the most significant tropical food legumes that caters to the protein needs of people. Though more than 300 insect species are known to cause damage to pigeonpea, the pod borer complexes are the major threat to pigeonpea growers as they infest during the reproductive stage. Among the pod fly, Melanagromyza obtusa Mulloch, causes 10-80% of the damage and its hidden behaviour makes management difficult. The pod fly infests the pigeonpea during the maturity stage and the damage is visible at the time of harvest. The damaged seeds are inappropriate for dietary and seed purposes. The experiments to screen 70 pigeonpea entries were carried out to find out the resistant source against M. obtusa and Co8 pigeonpea used as standard checks. The responses of 70 entries were as follows: one resistant, nine moderately resistant, six tolerant, seven equal to check, 14 moderately susceptible, 31 susceptible and two highly susceptible. The pigeonpea entry, IC 525468, demonstrated resistance with a pest severity index of 54.67 and a grade of 3. The entries ACP 1225, CRG 5, IC-525514, ICPL-84031, ICPL-86020, ICPL-90028, ICPL-91018, ICPL-91045, ICPR-2447 and UPAS-120 showed moderate resistance. The pest severity index ranged from 25.21 to 48.49 for moderately resistant entries and from 6.21 to 22.86 for those equal to the check. The resistant and moderate resistant can be employed in breeding programs for creating resistant varieties against pod fly.
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Reference
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