International Journal of Plant & Soil Science

The present study was analyzed the abundance of pest: defender ratio (P:D) over check plot under evaluation of ecofriendly insecticides against the major insect pests of rice in eastern Uttar Pradesh conditions for two consecutive years (2014 and 2015) at farmer field of district Deoria under the supervision of Department of Entomology, B.R.D.P.G. College, Deoria, Uttar Pradesh, India. There were 10 treatments (09 insecticides + 01 check) evaluated under randomized block design (RBD) by transplanting method of rice cultivation on localized popular rice cultivar Samba Mahsuri (BPT-5204). The insecticide treatments comprise 9 insecticides (CartapHcl, 50 SP, Indoxacarb 14.5 SC, Imidacloprid 17.8 SL, Chlorpyriphos 20 EC, Thiamethoxam 25 WG, Chlorantraniliprole 18.5 SC, Azadirachtin (Neem Oil) 0.03 EC, Bacillus thuringiensis kurstaki (Btk) 3.5 WP, and combination of Neem Oil 0.03 EC + Btk 3.5 WP).This evaluation was observed most effective ecofriendly insecticides concerned to lowest pest: defender ratio (P:D), lowest abundance of pest: defender ratio (P:D) over check plot, and highest yield. The inferences of pest: defender abundance ratio (P:D) over check plot and yield of rice crop were based on non-significant ecofriendly insecticides for the lowest pest: defender ratio (P:D). There were 2 insecticides (Neem Oil + Btk and Imidacloprid) inference non-significant for the lowest abundance of pest: defender ratio (P:D) over check plot. The mean ranking and inference of abundance of pest: defender ratio (P:D) over check was similar to the inference of non-significant ecofriendly insecticides for lowest pest: defender ratio (P:D) as, Neem Oil + Btk and Imidacloprid respectively.