Gyan Prakash Morya and Rajnish Kumar

A study was conducted on the evaluation of efficacy of some ecofriendly insecticides for the management of rice earheadbug (Leptocorisa acuta Thunberg) under rice ecosystem of Eastern Uttar Pradesh for the two consecutive years (2014 and 2015) at farmer field of district Deoria. This evaluation was observed most effective ecofriendly insecticides concerned to lowest infestation, lowest P:D ratio, and highest yield. 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. The surveillance was conducted as per methodology of agroecosystem analysis (AESA) (Pontius et al., 2002) modified as accessibility. The rice earheadbug is a sporadic insect pest of rice and accounted for 10-50% yield loss. It was observed most serious insect pest and confined infestation over 15% during the study. The insecticide treatments comprise 9 insecticides (Cartap Hcl, 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). There were 6 insecticides (Cartap Hcl, Indoxacarb, Imidacloprid, Chlorpyriphos, Thiamethoxam, and Chlorantraniliprole) inference non-significant for lowest infestation; 1 insecticide (Imidacloprid) inference non-significant for lowest P:D ratio; 2 insecticides (Cartap Hcl and Imidacloprid) inference non-significant for highest yield. There was only 1 insecticide (Imidacloprid) inference most effective ecofriendly insecticide. The Imidacloprid was observed only one the most effective ecofriendly insecticide as a chemical insecticide, because the rice earheadbug infestation was started abundantly after 40 days of transplanting, where bioagents population could not get opportunity to check the rice earheadbug population.

DOI: 10.22271/phyto.2019.v8.i5f.14642

Pages: 305-310  |  366 Views  164 Downloads