Effect of chemical control of weeds on yield and yield components of rapeseed in Ahvaz region

Abstract

To investigate the effect of chemical control of weeds on yield and yield components of rapeseed in Ahvaz region, a split-plot experiment was conducted in a randomized complete block design with four replications in 2012. The main factor in this experiment was 6 treatments including: control without the weed, application of Trifluralin herbicide, 2.5 liter per hectare pre planting, Butisan Star herbicide, 2.5 liters per hectare of the crop, Pre-emergence, Sethoxydim herbicide, 3 liters per hectare, Lonetral herbicide; 0.9 liters per hectare and control with the weed and the sub-factor included two cultivars of rapeseed (Hyola 308 and Hyola 401). The results showed that control treatment and Hyola 401 had the highest yield, and among the herbicides Trifluralin herbicide improved yield of rapeseed by better control of the weed. This fact shows high adaptability of Hyola 401 to the climate of Khuzestan (Iran) and also high ability of Trifluralin in controlling weeds in rapeseed.