Bio-efficacy of flumioxazin against mixed weed flora in grassland of Himachal Pradesh

Abstract

A field experiment was conducted during kharif 2021 at the Research Farm of Department of Agronomy, College of Agriculture CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur, to study the bio-efficacy of flumioxazin against mixed weed flora in grassland. The experiment was laid out in Randomized Block Design with three replications. The experiment consisted of nine weed control treatments viz., flumioxazin 150 g/ha, 200 g/ha, 250 g/ha, 300 g/ha, 500 g/ha, oxyfluorfen 1000 g/ha, weed free, glyphosate 4000 g/ha and untreated control. The major weeds in the experiment area were Ageratum conyzoides, Erigeron canadensis, Bidens pilosa, Cynodon dactylon, Cyperus sp., Digitaria sanguinalis and Plantago lanceolata. The results revealed that post-emergence application of flumioxazin 500 g/ha, which was statistically at par with flumioxazin 300 g/ha, flumioxazin 250 g/ha, flumioxazin 200 g/ha and glyphosate 4000 g/ha were quite effective in controlling weeds with higher weed control efficiency. Application of flumioxazin 300 g/ha resulted in significantly higher fresh and dry herbage yield of grasses which was at parwith flumioxazin 500 g/ha, 250 g/ha and 200 g/ha.