author(s)
Hari Chand, Anil Kumar, Md. Minnatullah, Sudhir Paswan and Shiva Pujan Singh

abstract
Field trial was conducted for three consecutive years 2015-16, 2016-17 and 2017-18 at Pusa farm, Sugarcane Research Institute, Dr. Rajendra Prasad Central Agricultural University, Pusa for bio-efficacy of insecticides against Pyrilla perpusilla in sugarcane. Based on polled statistically analysis, Abamectin-1.9 EC @ 1ml/litre of water was registered significantly superior as higher (57.31) per cent mortality was recorded at 3, 7 and 15 days after spraying (DAS) and it was at par with Acetamiprid -20 SP @ 5ml/litre of water and Imidacloprid-17.8 SL @ 0.05 ml/litre of water being 55.13 and 50.63, respectively. In case of egg masses and cocoon mortality varied from 6.05 to 38.25 and 6.73 to 36.45, respectively. The highest (38.25) per cent mortality of egg masses was recorded with Abamectin and it was at par with Imidacloprid (34.57), whereas, cocoon per cent mortality was also recorded highest (36.45) with Abamectin and minimum was with control (6.73) at 10 DAS. The yield of millable canes was also highest (84.76 t/ha) and it was at par with Acetamiprid (83.93 t/ha). The net profit with the treatments, Abamectin, Acetamiprid and Imidacloprid resulted higher returns of Rs./ha being 1.38, 1.29 and 1.26 lakh, respectively as compared to the rest of treatments. The order of insecticidal merit were Abamectin>Acetamiprid>Imidacloprid>Chloropyriphos > Fipronil and >Profenofos. However, all the treatments were superior over control.