Effect of Inter Row Spacing with or Without Weed Control in Wheat (Triticum aestivum L.)

TWO FIELD experiments were carried out at the Experimental Farm of the Faculty of Agriculture (Demo), Fayoum University, during 2016/2017 and 2017/2018 seasons, to study the effect of row spacing and weed control treatments on yield and its components of wheat plants and its associated weeds. The experimental design was split- plot arrangement in randomized complete block design with three replications where row spacing was considered as the main plot, weeds control treatments arranged in the sub-plot. Results indicated that row spacing treatments were significantly on annual weeds (g/m²) and yield components in both seasons. Narrow row spacing at 15cm gave the highest values of plant height at harvest (cm), number of spikes/m², grain and biological yield (ton/fad) in both seasons. The results indicated that the narrowest row spacing under this study (15cm) decreased the dry weight of total weeds by 42.22 and 43.29g/m² in first and second seasons, respectively, compared to wide row spacing. Weed control treatments were significant on yield and yield components in both seasons. The herbicides treatment with Granstar+Topik gave the highest values for all traits under these study in both seasons. The interaction between row spacing and weed control treatments were reacted significantly on annual weeds (g/m²) in both seasons. Wheat sown under narrow row spacing 15cm and applying Granstar+Topik herbicides achieved the best crop of wheat under the experiment conditions.