Control of liqorice (Glycyrrhiza glabra) through split doses of glyphosate
2006
Abdulahi, Abdolvahab | Haghparast, Reza
Liqurice is one of the most dominant perenial weeds of dry lands farming in Kermanshah, and annually caused significant damage to field crops. In this research to control the growth and regrowth of liqurice splited doses (SD) of Glyphosate , a systemic herbicide, were applied. The experiment was conducted based on randomized complete block design in 3 replications with 9 treatments : ( 2 lit/ha at once ), ( 1 + 1 lit/ha ), ( 0.5 + 0.5 + 0.5 + 0.5 lit/ha ), ( 4 lit/ha at once ), ( 2 + 2 lit/ha ), ( 1 + 1 + 1 + 1 lit/ha ), ( 6 lit /ha at once ), ( 3 + 3 lit/ ha ), ( 1.5 + 1.5 + 1.5 + 1.5 lit /ha ) and splited doses applied in 3 days interval. First herbicide application was conducted in fallow on a unique density of liqurice and before that the number of liqurice plants per plot were counted .In autumn, the plots cultivated with wheat , and in spring number of emerged liqurice plants counted to determine the effect of treatments in controlling the weed. Results indicated that applying 6 lit/ha , 4 lit/ha and 3+3 lit/ha of Glyphosate had respectively the best effect in controlling of liqurice. A significant linear relation was found between herbicide dose and regrowth density of liqurice, so the herbicide dose increases the the regrowth of liqorice decreases.
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