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Sensitivity of Wheat Genotypes to Newly Introduced Selective Herbicides

El-Taif, M.R.A. 2021. Sensitivity of Wheat Genotypes to Newly Introduced Selective Herbicides. Arab Journal of Plant Protection, 39(1): 55-60. Field experiments were conducted during the 2017-2018 growing season at the Research Station of the Field Crops Department, College of Agriculture, Tikrit University. The main aim of the study was to assess the sensitivity of six wheat genotypes to the newly introduced herbicides. The wheat genotypes evaluated were: Aba 95, Abu Ghraib-3, Research 22, Para 99, Sham 6 and Rasheed. The three herbicides applied according to the dosage recommended by the manufacturer as follows: (1) Konicor 80EC 750 ml/ha + Spotlight 75WD 20 ml/ha; (2) Plus 4.5% 500 ml/ha; and (3) Chevalier WG 15 300 g/ha, in addition to an untreated control. The experimental design followed was three replications. The herbicide treatments were randomly distributed. The Chevalier herbicide treatment showed the best results with lowest density of weeds 30 days after applying the pesticide (0.4 weeds/m2 ), highest number of wheat tillers (464.7/m2 ) and spikes (453.5/m2 ), the number of grains/spike (26.3) and the 1000 kernels weight (39.6 g), with a total yield of 4.7 tons/ha. Keywords: Sensitivity of wheat varieties, herbicides.