استفاده از روش تلفيقي خاكورزي و سمپاشي نواري در مديريت علفهاي هرز براي كاهش مصرف علف كش در زراعت چغندرقند (Beta vulgaris)

Using integrated inter- row cultivation and herbicide band application in sugar beet (Beta vulgaris) weed management for reducing herbicide use

A field experiment was conducted to investigate different weed management methods for reduce herbicide use in sugar beet at Arak Agriculture & Natural Research Center in 2005.Trial was designed in split-plot and consisted of 18 treatments with four replication. Each plot contains four 50 cm. rows, distance in inter row and 25cm. between plants on row. Main factor was inter row (with & without) cultivation. Sub factors were herbicide dosages in two application methods (band & spread application). Herbicides were Desmedipham(Betanal A. M.) plus Chloridazon (pyramin) that used as tank mix application. Inter row cultivation done with tender wheal tractor and spraying by stable pressure charging sprayer with drop raining nozzle. The result showed no significance difference between main plots in crop characteristics evaluated. Highest root yield, plant total weight and more reduce weed biomass and control was obtained with 100 and 75 percent of the recommended dosages of the herbicide in spread application and 75 percent recommended dosages in band application. Therefore, in order to decreasing herbicide use toward environmental safety aspects and increasing economical profit for farmers, it is recommended to use 75 percent herbicide dosage in spread and band application in integrated with cultivation instead of complete dose alone in sugar beet.