Bio-efficacy and economics of newer insecticides against major sucking pests as well as yield of summer green gram

Abstract

Green gram (Vigna radiata L. Wilczek) is a major pulse crop belongs to the family Leguminaceae and native to Indo-Burma region of Southeast Asia. It is attacked by various pests among them sucking pests are important pest of green gram. Thus, seven insecticides were evaluated against major sucking pests of green gram. Among them, flonicamid 50 WG and imidacloprid 17.8 SL against Aphid (A. craccivora); imidacloprid 17.8 SL and flonicamid 50 WG against jassid, E. (kerri) and diafenthiuron 50 WP against whitefly (B. tabaci) found most effective. Chlorantraniliprole 18.5 SC gives higher grain yield (1114 kg/ha) and haulm yield (1540 kg/ha) followed by flubendiamide 20 WG and emamectin benzoate 5 SG. The maximum per cent increase in grain and haulm yield over control was recorded in chlorantraniliprole 18.5 SC (53.30, 43.31%, respectively). No avoidable losses in grain and haulm yield was occurred in chlorantraniliprole 18.5 SC followed by flubendiamide 20 WG (3.59 and 2.61%, respectively). The highest ICBR obtained in the treatment of imidacloprid 17.8 SL (1:5.19).