بررسی کارایی مدیریت تلفیقی علف های هرز با استفاده ازمالچ و علف کش در چغندرقند

The experiment was carried out as randomized complete block design with three replications to evaluate integrated weed management on Sugar Beet yield in Astan Quds Razavi Field in Mashhad region in summer 2013. Treatments were included of two types of mulches(metallized and clear plastic) and weed control at two levels: 1 - recommended dose (desmedipham+phenmedipham + ethofumesat 4 liters per ha-1 for broad leaf weeds) + Haloxyphop r methyl 1 liter per per ha-1 for Grass weeds) and 2 - half the dose recommended (desmedipham+phenmedipham + ethofumesat 2 liters per hectare for broad leaf weeds) + Haloxyphop r methyl (0.5 liter per per ha-1 for Grass weeds) herbicides, respectively. The Complete weeds control (Weed free) and without weed control (weed infested) were also considered. The Results indicated that the lowest weed density and dry weight and the highest sugar beet root yield were in Complete weed control (Weed free) and weed control treatments by desmedipham+phenmedipham + ethofumesat + Haloxyphop r methyl at recommended doses was obtained, respectively. Of course, due to the lack of statistical difference between treatments in general we can conclude that the use of herbicides at half the recommended dose or use mulch have the same result.