Screening of Greengram Germplasm against Cowpea Weevil Callosobruchus maculatus (F)

Green gram (Vigna radiata) germplasm was evaluated against cowpea weevil Callosobruchus maculatus (F.) infestation under laboratory conditions at the Department of Zoology, BSNV PG College, University of Lucknow during 2024 on thirty Vigna radiata germplasms. Parameters measured included, number of egg laid/ 100 seeds, adult emergence, mean developmental period, growth index and resistant index. Remarkable variation were observed for all the parameters. The most resistance germplasm IPM-2014-9 (Varsha) and IPM-302-2 (Kanika) recorded 2.33± 0.33 and 2.67± 0.32 no. of eggs/ 100 seed compared to PDM-54 with 25.33± 0.88 eggs/ 100 seeds. No adult emergence was observed in IPM-2014-9 and IPM-302-2; highest emergence was 90.52± 3.60 in BMS-18-1; there was no development in IPM-2014-9 and IPM-302-2. Highest growth index was 0.88± 0.001 in BMS-18-1. IPM-2014-9 and IPM-302-2 are highly resistant while BMS-18-1, BMS-18-2 and SELECTION 18-4 are highly susceptible.