Efficacy of plant derived and synthetic insecticides against mustard aphid for quality seed production

The study was conducted in the experimental field of Sher-e-Bangla Agricultural University, Dhaka during the 2017-2018 using BARI Sarisha-15 to evaluate the effectiveness of some promising bio-pesticides on aphid population abundance in field condition. Among the treatments, Spinosad 45EC performed as the most effective insecticide in reducing the highest percent of aphid population on leaves (60.00%) whereas Detergent showed the least performance (39.54%). In inflorescence, Spinosad 45EC performed as the most effective bio-insecticide in reducing the highest percent of aphid population (68.06%) whereas detergent showed the least performance (53.57%). The maximum quality seed of BARI Sarisha-15 obtained from treatment Spinosad 45EC (1.62 mt ha-1) due to lower aphid abundance. On the other hand, lower quality yield performance obtained from the T7 treatment due to an untreated control (1.29 mt ha-1). After harvesting of seed, height germination (95.33%) was found in T4 (Spinosad 45EC), on the other hand lowest germination (77.67%) was found in T7 (Control plot).