Investigating weed control in cotton by integrated chemical and non-chemical methods.(Pre-plant, Pre and Post emergence herbicides and cultivator)
2006
Heidari, Asghar | Salimi, Homeira | Bazoobandi, Mohamad | Freidoonpour, Mohamad | Shimi, Parviz
In order to investigate efficacy of the integrated weed management in cotton fields, an experiment was carried out in three locations ( Varamin, Khorasan, Fars) during 2005- 2006. The experiment was conducted in randomized complete block design with 13 treatments and 4 replications. Treatments included: Treflan (trifluralin 48% EC) at 2.5 l/ha (ppi), Sonalan( ethalfluralin 33.3%EC ) at 3.5 l/ha ( ppi), Envok 75 WG at 15 gr/ha with cytogate 2/1000 ( post emergence at the 5-7 leaf stage of cotton), Convoy DF at 2.9 kg/ha (pre emergence), Treflan at 2 l/ha + Envok 75 WG at 10 gr/ha with cytogate 2/1000 , Treflan at 2 l/ha + cultivator, Sonalan at 3 l/ha + Envok 75 WG at 10 gr/ha with cytogate 2/1000 , Sonalan at 3 l/ha + cultivator, Convoy DF at 1.7 kg/ha + Envok 75 WG at 10 gr/ha with cytogate 2/1000, Convoy DF at 1.7 kg/ha + cultivator , weed free and weed checks. Cultivator was used once (20 – 25 days after planting) in the first year and twice ( 20 – 25 days and 35- 40 days after planting) in the second year. Results showed that Envoke + Treflan, Envok + Sonalan and Envok + Convoy had the most weed control and cotton yield. Using these herbicides together was more effective than using of them alone. Cultivator showed result better results in Khorasan, but it did not control weeds compared to other treatments. Integration of cultivator with Sonalan, Treflan and Convoy was more effective than cultivator alone.
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