Effect of herbicide combinations on growth, yield and nutrient uptake by weeds in irrigated wheat

Abstract

An experiment was carried out for two consecutive rabi season of the year 2017-18 and 2018-19 to investigate the “Effect of herbicide combinations on growth, yield and nutrient uptake by weeds in irrigated wheat. Results showed that post emergence application of pre-mix herbicides sulfosulfuron + metsulfuron 30 + 2 g/ha, clodinafop + metsulfuron 60 + 4 g/ha and mesosulfuron + iodosulfuron 12 + 2.4 g/ha recorded significantly lower density and dry biomass of weeds, improve the promising yield attributing viz., number of effective tillers/m2, number of total tillers/m2, tiller conversion index and grain yield as well as straw yield with minimum nutrient uptake by weeds than other treatments. Sequential application of pendimethalin (PE) 500 g/ha fb sulfosulfuron (PoE) 18 g/ha, twice hand weeding at 20 and 40 DAS and tank mix formulation of sulfosulfuron + 2,4-D (SS) (PoE) 25 + 250 g/ha was stood second best treatment during both the years.