A field experiment was carried out to test the efficacy of insecticides against aphid Aphis craccivora in fenugreek at the Research Farm, Agricultural Research Station, Mandor-Jodhpur during rabi, 2021-22. After two sprays, flonicamid 50 WG was found most effective while azadirachtin 10,000 ppm (4.73 aphids/5 cm central shoot) treated plots was found least effective. Maximum yield (1722 kg/ha) was obtained from the plots treated with flonicamid 50 WG. The highest benefit-cost ratio was observed with thiamethoxam 25 WG (3.79:1) followed by flonicamid 50 WG (3.57:1). All the treatments showed no harmful effect on the natural enemies especially the coccinellids.