Bio-efficacy of metsulfuron methyl and carfentrazone ethyl against weed spectrum in wheat (Triticum aestivum L.)

Abstract

A field experiment was conducted during the winter (rabi) season of 2016–17 and 2017–18 at the Chandra Shekhar Azad University of Agriculture and Technology Kanpur, Uttar Pradesh, to evaluate bio-efficacy and phytotoxicity of metsulfuron methyl 10% + carfentrazone ethyl 40% against weed flora in irrigated wheat crop (Triticum aestivum L). Major dominant weeds that infested the crop were lamb’s quarters (Chenopodium album L.), scarlet pimpernel (Anagallis arvensis L.) and white sweet clover (Melilotus albus Medik.). The lowest dry weight (g/m2) and weed-control efficacy (WCE) of test weed species were found in treatments T4 (metsulfuron methyl 10% + carfentrazone ethyl 40% @ 100 g/ha), T3 (metsulfuron methyl 10% + carfentrazone ethyl 40% @ 75 g/ha) and T2 (metsulfuron methane 10% + carfentrazone ethyl 40% @ 50 g/ha) respectively. Application of metsulfuron methyl 10% + carfentrazone ethyl 40% at all doses was found to be effective against all the 3 weeds and significantly increased the yield of the main crop. Application of weedicides did not show any phytotoxicity symptoms on the wheat crop in both the seasons and also on the succeeding crop of rice (Oryza sativa L.).