Faribi Meighani; mohammadreza karaminejad
Abstract
This study was conducted in the research field of Iranian Research Institute of Plant Protection in Karaj as strip split plots with three replications. The first factor: tillage and no-tillage, and the second factor: herbicide: Glyphosate 6 L/ha, 2,4-D + MCPA 2L/ha, Glyphosate + 2,4-D + MCPA (6 + 2 L/ha), ...
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This study was conducted in the research field of Iranian Research Institute of Plant Protection in Karaj as strip split plots with three replications. The first factor: tillage and no-tillage, and the second factor: herbicide: Glyphosate 6 L/ha, 2,4-D + MCPA 2L/ha, Glyphosate + 2,4-D + MCPA (6 + 2 L/ha), Glyphosate 3 L/ha, 2,4-D + MCPA 1 L/ha, Glyphosate + 2,4-D + MCPA (3 + 1 L/ha), and control without herbicide. The number of field bindweed shoot was determined 15, 30 and 45 days after spraying and field bindweed biomass was determined 45 days after spraying. In the second year, sugarbeet was planted and the effect of herbicides was determined on sugarbeet yield. The best treatment for field bindweed density decrease was Glyphosate + 2,4-D + MCPA (6 + 2 L/ha). The same treatment and its split dose as suitable treatments caused the most decrease in field bindweed biomass. There was no significant difference between till and no-till treatments in view of their effect on field bindweed density and biomass. Under effect of no-till treatment, field bindweed biomass showed more decrease and under effect of no-till treatment, sugarbeet yield showed more increase. Overall, The best treatment for field bindweed density and biomass was Glyphosate + 2,4-D + MCPA (6 + 2 L/ha) and after that its split dose.