Control of weed in canola (Brssica napus L.) by Chemical and Mechanical Methods
2003
Pourazar, Reza | Habibiasl, Jaafar
Two field trials conducted to investigate Chemical and Mechanical methods to control of weeds in canola(Brassica napus L.) one on MAKHAR(i.e.Irrigation for suitable tillage condition) and the other one on Non-MAKHAR condition.Experiments with split block and 4 replications were used in Shavoor station in 2001-2003.Main plots of the two experiments were showel cultivator and non-cultivator and hand weedy.Sub plots were Tereflan herbicide (2 l/h),Sonalan herbicide(3 l/h) and Non-herbicide treatments.The results showed that the highest dry eieght and the lowest of both two experiments obtained from Non-cultivator and Non-herbicide treatments,which showed significant differences. The highest yield was obtained from hand weedy in association which use of herbicide and also from cultivator in association with use of herbicide.There results showed that if herbicide is used canola,besides after canola cultivation,canola will grow rapidly as a result of weeds control and approperate air flow in soil and it will over come the weeds remaining and high yield will be obtained.Either of the two herbicides(Treflan and Sonalan)showed the same effect on weed control by itself in the two years of experiments, but in the second year when it associated which cultivator ,Treflan showed higher yield than Sonalan.The use of Treflan and Sonalan by itself could not control Sinapis arvensis,Silybum marianum and Malva rotundifolia , and the used of cultivator by itself could not control weeds as a result of observing weeds remaining on rows.The results of this study demonstrated that by using herbicides such as Treflan and Sonalan in association with cultivator we are able to control weeds. A comparison between the two experiments showed that in MAKHAR the yield of canola and dry weight of weeds were higher and lower that Non-MAKHAR experiment respectively.These results showed that pre-cultivation MAKHAR could decrese the weeds growth and consequently increase yield.
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