Study of Bioefficacy and Phytotoxicity of Carfentrazone-ethyl 40% DF in Direct Seeded Rice

Abstract

A field experiment was conducted at ARS, Repoli (18⁰.18’ North latitude and 73⁰.32’ East longitude), to study the bioefficacy and phytotoxicity of Carfentrazone-Ethyl40 % DF in direct seeded rice during Summer (January) of 2018. The field experiment was laid out in randomised block design with 14 treatments consists of Carfentrozone ethyl 40% DF @ 12.5 g ml^-1 a.i. ha^-1 at 20 DAS, Carfentrozone ethyl 40% DF @ 25 g ml^-1 a.i. ha^-1 at 20 DAS, Carfentrozone ethyl 40% DF @ 50 g ml^-1 a.i.ha^-1 at 20 DAS, Carfentrozone ethyl 40% DF @ 12.5 g ml^-1 a.i.ha^-1at 30 DAS, Carfentrozone ethyl 40 per cent DF @ 25 g ml^-1 a.i. ha^-1 at 30 DAS, Carfentrozone ethyl 40% DF @ 50 g ml^-1 a.i.ha^-1at 30 DAS, Carfentrozone ethyl 40% DF @ 12.5 g ml^-1 a.i.ha^-1 at 40 DAS, Carfentrozone ethyl 40% DF @ 25 g ml^-1 a.i. ha^-1 at 40 DAS, Carfentrozone ethyl 40% DF @ 50 g ml^-1 a.i. ha^-1 at 40 DAS, Carfentrozone ethyl 40% DF @ 25 g ml^-1 a.i. ha^-1 at 30 DAS (market product), Oxyflourofen 23.5% EC @ 150-240 a.i. ha^-1 at 30 DAS, Bispyribac sodium 10% SC @ 20 g ml^-1 ha^-1 at 30 DAS, Untreated control and Hand weeding at 20 DAS and 40 DAS and three replications. Application of Carfentrozone ethyl 40% DF @ 25 g ml^-1 a.i. ha^-1 at 30 DAS recorded significantly higher grain and straw yield as compared to rest of the treatments under study as well as more weed control efficiency (86.19%) at harvest. No phytotoxicity effect was observed in any treatment after testing Carfentrozone ethyl 40% DF in direct seeded rice.