Field assessment of blackgram (Vigna mungo L. Hepper) genotypes against major insect pests in subtropical region of Nepal

Direct damage due to insect pests is one of the major causes limiting yield potential blackgram (Vigna mungo L. Hepper) in Nepal. A total 17 genotypes were screened for resistance pests, including aphid (Aphis craccivora Koch.), whitefly (Bemisia tabaci Genn.), hairy caterpillar (Spilosoma obliqua Walker) and pod borer (Helicoverpa armigera Hubner) National Maize Research Program, Rampur, Chitwan during summer season 2018 2019. The design experiment was randomized complete block having three replications. Genotypes sown on first week August a unit plot size 4 rows 2 m long with 40 cm row spacing continue plant maintained net harvested 3.2 square meters. recommended dose fertilizer 20:40:20 N:P2O5:K2O kg/ha seed rate 25 kg/ha. package agronomic practices followed as per national recommendation. Data insects collected by counting number plant. components recorded at harvest. All differed significantly (p<0.05) population, components. From two years field data, BLG0069-1, BLG0036-1 BLG0079-1 had lower above mentioned populations, exhibited more resistant both produced higher grain (~1.5 t/ha) than other genotypes. These might be useful development pest tolerant high yielding variety subtropical region