Assessment of pre-mix broad spectrum herbicides for weed management in wheat

Abstract

A field experiment was carried out during the Rabi season of 2014 and 2015 on sandy loam soil to test the bio-efficacy of pre-mix broad spectrum herbicides for weed management in wheat. Major dominant weed flora in the experimental plot were Chenopodium murale (54.1%), Chenopodium album (11.9%), Phalaris minor (10.4%) and Melilotus alba (9.6%). Application of pre-mix sulfosulfuron (75%) + metsulfuron-methyl (5%) 32 g/ha as post-emergence, clodinafop (15%) + metsulfuron-methyl (1.0%) 64 g/ha as post-emergenc (PoE), mesosulfuron (3%) + iodosulfuron-methyl sodium (0.6 %) 14.4 g/ha as PoE and hand weeding at 20 and 40 DAS remained at par with each other and significantly reduced the density and biomass of both monocot as well as dicot weeds and resulted in significantly more number of effective tillers and yield of grain and straw. However, mesosulfuron (3%) + iodosulfuron-methyl sodium (0.6 %) 14.4 g/ha PoE showed phytotoxic effect on plant.

Management of Complex Weed Flora through Herbicide Combinations in Irrigated Wheat (Triticum aestivum L.).

“…The welldeveloped crop canopy, intercepting solar energy effectively covered the ground area which reduced the weed emergence and increased the weed control efficacy. Similar results were also reported by Patel et al, (2017) and Chaudhari et al, (2017).…”

“…Hence, pre-mix formulations of herbicide effectively manage the both group of weeds due to their higher efficacy as compared to sole application of herbicide. These line of results are in accordance with the findings of Chaudhari et al, (2017) and Patel et al, (2017). The highest numbers of total weeds and dry weight of weeds was observed under un-weeded control (T 12 ) during the year 2017-18 and 2018-19 as well as in pooled analysis.…”

Post-Emergence Herbicides for Effective Weed Management, Enhanced Wheat Productivity, Profitability and Quality in North-Western Himalayas: A ‘Participatory-Mode’ Technology Development and Dissemination

“…Similarly, Sulf + Met exhibited a relatively higher knockdown effect on NWLs and BLWs owing to the inhibition of ALS enzyme-impairing amino acid biosynthesis selectively killing the weeds and reducing crop-weed competition for space, light and nutrients, which collectively led to better growth and yield attributes (spikes m −2 , grains spike −1 ) in wheat, resulting in a higher wheat yield and protein yield over other herbicidal combinations [35,36]. Thus, the low weed infestation in Sulf + Met and WFC helped in accumulating more biomass in wheat plants owing to better nutrient and water acquisition and optimum photosynthesis as a result of low crop-weed competition for light and space, which resulted in better yield expression in wheat [31,35,39,40]. The solitary use of a single herbicide resulted in lesser grain and straw yield in wheat due to poor weed control and higher crop-weed competition [36][37][38]41].…”

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

“…Significantly higher effective tillers/m 2 , total tillers/m 2 and tiller conversion index of wheat were registered under application of pre-mix herbicide sulfosulfuron + metsulfuron (PoE [6] . The grain yield improvement by weed control with different herbicide combinations has already been reported by Bharat and Kachroo (2010) [3] , Chaudhari et al (2017) [4] and Patel et al (2017) [9] .…”

“…A secondary effect is stunted growth on account of cessation of cell division and slow plant death. Contrary to the alone application of either of the herbicide was not found effective to control all sort of the weeds in the entire crop year (Lekhchand [5] , Chaudhari et al 2017 [4] and Meena et al, 2019) [6] . Sequential application of pendimethalin (PE) 500 g/ha fb sulfosulfuron (PoE) 18 g/ha, twice hand weeding at 20 and 40 DAS, sulfosulfuron + 2,4-D (SS) (PoE) 25 + 250 g/ha and sulfosulfuron (PoE) 25 g/ha was at par with pre-mix herbicides treatment in case of monocot and dicot weed density as well as weed dry weight.…”