Effect of Recent Herbicides on Growth and Yield of Two Bread Wheat (Triticum aestivum L.) Varieties and Associated Weeds

Abdulateef, M.A., A.M.A. Almashhadany, S.I. Alobaidi and N.J. Mohammad. 2024. Effect of Recent Herbicides on Growth and Yield of Two Bread Wheat (Triticum aestivum L.) Varieties and Associated Weeds. Arab Journal of Plant Protection, 42(4): 474-481. https://doi.org/10.22268/AJPP-001268 The field study was carried out to evaluate the effect of herbicides on the weeds associated with the soft wheat crop (bread wheat) and wheat yield. Experiments were conducted in two sites, a farmer field in the Bashiqa area, northeast of Mosul, and the second in the field of the research station of the Field Crops Department, Faculty of Agriculture and Forestry, University of Mosel. The herbicides tested were Lancelot 450, Clodia 300 EC and Aciad 6 E and compared with an untreated control. In addition, two bread wheat varieties were investigated, Behoth 22 and Jehan. Experiments were conducted based on randomized complete block design, and results were statistically analyzed by the SAS program. The significance of means was determined by the Duncan’s multiple range test at P=0.05. The results obtained showed that there are significant differences between the varieties in most of the investigated traits (number of narrow weeds, the weight of narrow weeds, the number of wheat spikes, the weight of 1,000 seeds and total yield) in both study sites. The herbicides Clodia 300 EC and Lancelot 450 were significantly better than Aciad 6 E with a higher grain yield of 267.99 and 263.14 g/m2 , respectively, at the second site. As for the interaction between varieties and herbicides, the combined treatment of the Behoth 22 variety and the herbicide Lancelot 450 was the most effective in weed control, and gave the highest grain yield at both sites. Keywords: Herbicide, bread wheat, weeds, Triticum aestivum L.