Field Experiment on Integrated Weed management in wheat was conducted at the Fitche Agricultural Research Center during the main growing season of 2022 and 2023. The study was designed in a randomized complete block design with three replications and consisted of eleven (11) treatments. As a result of the experiment, the lowest total weed density was recorded in Weed free check (2.58 msup-2/sup) and One times application of Obest 8EC at three weeks after Emergence + one times hand weeding at five weeks after emergence (5.067 msup-2/sup), followed by One times application of Obest 8EC at three weeks after Emergence treatment (8.08msup-2/sup), and the grain yield from weed free plot was found to be the maximum (4966.677 kghasup-1/sup), followed by One times application of Obest 8EC at three weeks after Emergence + one times hand weeding at five weeks after emergence (4509.801 kghasup-1/sup) and One times application of Obest 8EC at three weeks after Emergence treatment (4061.322 kghasup-1/sup). The highest control efficiency was recorded (94.64% in the weed free plots, One times application of Obest 8EC at three weeks after Emergence + one times hand weeding at five weeks after emergence (93.28%). In contrast the highest weed density (123.253 msup-2/sup) and lowest grain yield (1274.796 kghasup-1/sup) were achieved in weed-infested control plot. According to the economic analysis, the maximum net benefits (403130.56 birrsup-1/sup) were obtained from Weed free check treatments and One times application of Obest 8EC at three weeks after Emergence + one times hand weeding at five weeks after emergence (367956.74 birrhasup-1/sup) and One times application of Obest 8EC at three weeks after Emergence treatment (340061.22 birr hasup-1/sup), Overall, it was concluded that One times application of Obest 8EC at three weeks after Emergence treatment were highly effective in controlling the major weeds grasses observed in wheat fields. One times application of Obest 8EC at three weeks after Emergence + one times hand weeding at five weeks after emergence is recommended for the study area.
Feyissa et al. (Wed,) studied this question.