author(s)
Adesh Kumar, Abhijeet Srivastava, Roomi Rawal and Nishi Roy

abstract
Jhansi district villages come under a Bhundelkhund region of Uttar Pradesh were surveyed during rabi season 2017-18 and mustard aphid manifestation was recorded. The maximum mean population 42 aphids/plant was observed in Lakara village and the second highest population was observed in two villages namely Birgua and Booda with 40 aphids/plant. Field experiment was carried out to evaluate the efficacy of four insecticides during 2017-18 at Krishi Vigyan Kendra, Bharari, Jhansi (U.P.). It was observed that Thiamethoxam (Actara) (T4) showed the lowest population with 2.60 aphids/ top 10 cm central twig at 4 days after spraying (DAS) and reduced 91.40% aphid population and also effective upto 8 days reduced 92.4% population. Profenofos 40%+ Cypermethrin 4% (Profex Super) (T2) also showed good result with 3.30 aphids/ top 10 cm central twig and it was reducing 89.2% and 90.10% aphid population after 4 and 8 days spraying (DAS) respectively. It was also observed that Chlorpyrifos 20 EC, (Topline) showed less effective as compared to other three chemical which reduced 83.5% aphid population on 4 days after spraying. Deltamethrin 1%+Trizophos 35% (Ammo) also reduced the aphid population on 4 days after spraying 85.80% and 86.7% after 8 days.