Efficacy of newer insecticides against rice borer complex under North Bihar condition

Abstract

The present experiment conducted to study the field efficacy of eight newer insecticides viz., Imidacloprid (17.8 SL), Thiamethoxam (25 WG), Sulfoxaflor (24 SC), Triazophos (40 EC), Dinotefuron (20 SG), Buprofezin (25 SC), Monocrotophos (36 SL) and Acephate (75SP) against different rice borers like yellow stem borer, pink borer, white stem borer and dark headed stem borer at Agricultural farm of Dr. Rajendra Prasad Central Agricultural University Pusa Samastipur (Bihar) during Kharif 2016 and Kharif 2017. The variety Rajendra Bhagwati was planted in RBD design with three replication and the result showed that among all treatments lowest deadheart infestation of yellow stem borer, pink stem borer, white stem borer and dark headed stem borer were recorded in Imidacloprid 17.8SL (4.20%, 1.37%, 1.33% & 1.62%) and Thiamethoxam 25SL (4.94%, 1.69%, 1.51% & 1.84%) respectively over the standard check Monocrotophos 36SL (6.73%, 1.95%, 1.68% & 2.18%). But the treatment Dinotefuron 20 SG found least effective against all borers. Among all treatments Imidacloprid 17.8SL (8.58%) and Thiamethoxam 25SL (9.33%) found superior in reducing white earhead percent of all stem borer over the standard check Monocrotophos (12.86%). Dinotefuron 20 SG found least effective among all treatments.