Ashenafi Mitiku and Dawit Dalga
Filed experiment was conducted in south eastern part of Ethiopia at Madawalabu University and Shallo with the objective of to investigate the application of topic in a different time with different seed rate of bread wheat on weed density and yield of bread wheat. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications and five treatments. The experiment was conducted by a Dendea variety of bread wheat with the following treatments application of topical 15day with 120kgha-1,30day with 130kgha-1, 45day with 140kgha-1, 60 days with 150kgha-1 and 100kgha-1 seed rate of bread wheat as a control. Statistical analysis showed that the integration of different time of topic application with different seeding rate of bread wheat had a significant (P<0.001) effect on weed density and yield of wheat. Maximum number of tillers (9.67 and 7/plants), grain per spike (64 and 57), spike length (10cm and 7cm) and plant height (91.5cm and 65.2cm), 1000g grain weight (56.67g and 49g) and grain yield (4104.5kg/ha and 3462.7kg/ha), the highest weed controlling efficacy 57.3% and 27% were recorded in application of topic at 30 days with 130kgha-1 of bread wheat at Shallo and Madawalabu University respectively. As compared to 60day with 150kgha-1 and control integration of topic 15day with 120 kgha-1 and 45day with 140kgha-1 seed rate was effective to increase yield of bread wheat. Therefore, application of topic at 30 days with 130kgha-1 of seed rate was recommended for the control of weeds and to increase yield of bread wheat.
