Effect Of Herbicides On Weed Dynamics And Yield And Yeild Attribute Of Bread Wheat Triticum Aestivum L. In South Eastern Part Of Ethiopia

ABSTRACT Wheat Triticum aestivum L. is the most important crop among food cereals. The experiment was conducted at south eastern part of Ethiopia to investigate the efficacy of three herbicides on weeds and growth and yield of wheat. The experiment was laid out in Randomized Complete Block design RCBD with three replication. Treatments were combination of 2 4-D with pallase Topic with 2 4-D pallase only weed free and weed check were also included for comparison. The following data collected weed density tiller number weed biomass spike length seed per spike1000g weight and grain yield. Statistical analysis of experiment showed that application of pallase exhibited the best performance with minimum weeds density 10.67m2 and higher weed controlling efficacy of 84.4 as compared to weedy check 69 m2 followed by combination of pallase with 24-D had 68.6 of weed controlling efficacy and hand weeding. Combination of Topic with 2 4-D had moderate weed density and with weed controlling efficacy of 63.77. Number of tillers 8.67plants grain per spike 63 spike length 8.67cm plant height 75.17cm Maximum 1000g grain weight 66.67g and 4161kgha at maturity were recorded at Pallase treated plots. Therefore application of pallase was recommended for controlling of weeds and increasing yield attribute of wheat.