In this research, the effects of plant density and reduced sulfosulfuron plus metsulfuron-methyl on weed infection and wheat yield, a split plot experiment based on a randomized complete block design with four replications at Agronomy Research Farm, Islamic Azad Univers
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In this research, the effects of plant density and reduced sulfosulfuron plus metsulfuron-methyl on weed infection and wheat yield, a split plot experiment based on a randomized complete block design with four replications at Agronomy Research Farm, Islamic Azad University during 2012-13, it was evaluated. The main plot consist of various doses of sulfosulfuron + metsulfuron-methyl in three levels of 20, 30 and 40 g a.i. ha-1with weed free and weedy check (control) plots were included for comparison and subplot including different wheat density at four levels of 300, 400, 500 and 600 plant m-2. Results experiments revealed that a fairly acceptable level of weed suppression in wheat fields was achieved with lower doses of sulfosulfuron plus metsulfuron-methyl (30 g a.i. ha-1) in combination with density of 500 plant m-2 that were comparable to results with its label dose. Increased density was able to increased grain yield and number spike m-2. As, the number of spikes (650) and yield (486.3 g. m-2) were obtained at a density of 600 plant. m-2. 1000-grain weight decreased with increasing density. The results suggested that weeds can be controlled in wheat, for a higher yield, when a reduced herbicide dose (30 g a.i. ha-1) is used in combination with increasing density (500 plant m-2).
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