Author(s): D. MUKHERJEE

Abstract: A field experiment was conducted at District Seed Farm (AB Block), Kalyani under Bidhan Chandra KrishiViswavidyalaya during winter season of 2014 and 2015 in upland situation to study the effect of various weed management practices on the growth and yield of wheat. The experiment was carried out in a randomized block design with fourteen treatments in three replications. Amongst various integrated weed management practices, total weed density and dry weight at 30 days after sowing (DAS) lowest observed with the hoeing (20 DAS) + fenoxaprop ethyl @ 100g a.i.ha-1, and showed parity with the stale seed bed fb 2,4 DEE @ 750 g a.i ha-1 and pendimethalin + hoeing at 20 DAS. However at 60 DAS, minimum weed population registered with hoeing (20 DAS) + metribuzin @175 g a.i.ha-1, and was at par with the hoeing (20 DAS) + sulfosulfuran @ 25 g a.i ha-1 and stale seed bed fb 2,4 DEE @ 750 g a.i ha-1. Total dry weight of weed at 60 DAS, least found with the hoeing (20 DAS) + metribuzin @175 g a.i.ha-1 and statistically similar with the stale seed bed fb 2,4 DEE @ 750g a.i. ha-1, and notably better to all other treatments. LAI was considerably affected by various weed control measures and maximum LAI at 50 and 70 DAS, registered with the weed free situation and its showed parity with the hoeing (20 DAS) + metribuzin @175 g a.i.ha-1, and considerably better to all other set of treatments. Amid various yield attributing characters, highest number of effective tillers registered with the weed free situation, and was at par with the hoeing (20 DAS) + sulfosulfuran @ 25 g a.i.ha-1, hoeing (20 DAS) + metribuzin @175g a.i.ha-1 and stale seed bed fb 2,4 DEE @ 750 g a.i.ha-1). Highest grain yield was observed with the weed free situation (3.92 t ha-1), and was at par with the hoeing (20 DAS) + metribuzin @175 g a.i.ha-1(3.78 t ha-1) and hoeing (20 DAS) + sulfosulfuran @ 25 g a.i.ha-1 (3.56 t ha-1). Nutrient uptake by crop and weeds, were significantly influenced by various treatments and maximum nutrient absorbed by weed free and hoeing (20 DAS) + metribuzin (@175 g a.i.ha-1). Amongst various treatments, highest B:C ratio recorded with the hoeing (20 DAS) + metribuzin @175 g a.i.ha-1 (2.03) and was closely followed by stale seed bed fb 2,4 DEE @ 750g a.i.ha-1 (2.01).

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