Abstract:
The experiment was conducted in the winter season of 2017/2018 at the farm of the College of Agricultural Studies –Shambat- Sudan University of Science and Technology- Bahri Locality- Khartoum State, located between latitudes 15 and 40 degrees North and longitudes 32 and 23 degrees East to evaluate the effects of the Pendimethalin herbicide treatments used as pre-emergence at 1.0, 1.5, 2.0 and 3.0 l/f on weed control and shoot fresh weight/plant of faba bean in endeavour to determine the most suitable weed control treatment, which secure high shoot fresh weight.
All herbicide treatments except (Pendimethalin at low rate) and the hand weeding control treatment significantly increased shoot fresh weight (g) / plant. Pendimethalin at 2.0 and 3.0 l/f treatments gave shoot fresh weight (g) / plant comparable to that obtained by the hand weeding control treatment.
In the experimental site broad-leaved weeds were predominant. Pendimethalin at 1.0, 1.5 and 2.0 l/f gave moderate percentage graminae weed control while Pendimethalin at 3.0 l/f gave goodpercentage graminae weed control. The hand weeding control gave excellent gramine weed control. Among the herbicide treatments the best graminae weed control was achieved by St Pendimethalin at 1.0 l/f gave moderate percentage broad-leaved weed control, Pendimethalin at 1.5 l/f gave good percentage broad-leaved weed control while Pendimethalin at 2.0 and 3.0 l/f gave excellent percentage broad-leaved weed control. The hand weeding control gave excellent broad-leaved weed control. Pendimethalin at 2.0 and 3.0 l/f gave excellent percentage broad-leaved weed control which was comparable to that found by the hand weeding control treatment.
Pendimethalin at 1.0 and 1.5 l/f gave moderate percentage weed control, Pendimethalin at 2.0 I/f gave good percentage weed control while Pendimethalin 3.0 l/f and the hand weeding control gave excellent percentage weed control. Pendimethalin at 3.0 l/f gave excellent percentage weed control which was comparable to that obtained by the hand weeding control treatment
All herbicide treatments except pendimethalin at low rate and the hand weeding control treatments resulted in a significant decrease in weed biomass (g/m2). Among herbicide treatments Pendimethalin at 2.0 and 3.0 l/f were the best treatments which gave comparable to that obtained by the hand weeding control.
