author(s)
Vesalu Khape, Pankaj Neog and Hannah K Asangla

abstract
A study on “Efficacy of insecticides against major insect pest of pigeon pea in Nagaland” was conducted during the Kharif season of 2017 and 2018 in the Entomology Experimental farm of School of Agricultural Sciences and Rural Development, Nagaland University, Medziphema, Nagaland. There were 7 treatments arranged in randomized block design with three replications. During the investigation, Maruca vitrata, Apion sp., Aphis craccivora, Riptortus sp. and Helicoverpa armigera were the major insect pests of Pigeon pea. Out of the 6 insecticide treatments, Indoxacarb 4.5 + Novaluron 5.25 SC were effective against Maruca vitrata, while Cypermethrin 25 EC showed its efficacy against Apion sp., and Helicoverpa armigera. The treatment from Cypermethrin 25 EC exhibited the lowest pod damage with a mean of 24.77%, and the highest grain yield of 1460 kg/ha with the highest Benefit Cost ratio (10.88: 1).