ARC Home I SJAR Home I About SJAR I Article Order Info. I Contribution to SJAR
Sudan Journal of Agricultural Research
Chemical
weed control in faba bean in northern Sudan
Elsadig S. Mohamed, A.G.T. Babiker, M. E. K. Ali, G. E. Mohamed, M. I.
Mohamed and A. T. Ahmed
Abstract:
Field experiments were conducted in different locations in northern Sudan during 1990-91 – 1994-95 seasons to study the effects of pre-emergence application of the herbicide imazethapyr, alone or in tank-mixture with pendimethalin or oxyfluorfen, in controlling weeds and its selectivity for faba bean and to study the efficacy and technical feasibility of chemical weed control in faba bean in northern Sudan. Faba bean showed high tolerance to the herbicide imazethapyr when applied pre-emergence to the crop at 0.025 – 0.075 kg a.i. /ha. The herbicide imazethapyr displayed excellent activity against the broad-leaved weeds, but its activity against grassy weeds was poor to moderate. Excellent control of most weeds was achieved when tank-mixture of this herbicide with pendimethalin ( 1.2 kg a.i. /ha ) or oxyfluorfen ( 0.24 kg a.i. /ha ) was used. However, the performance of these herbicides was greatly affected by the presence of the leguminous weed, Rhyncosia memnonia, and the perennial weeds, Cyperus rotundus and Cynodon dactylon. One supportive hand weeding, at 30 days after sowing, considerably improved the performance of these herbicide treatments. Pre-emergence application of the herbicide imazethapyr in combination with pendimethalin or oxyfluorfen significantly increased faba bean grain yield over weedy check and gave yields comparable to the weeded control. Results of on-farm trials indicated the feasibility of the chemical weed control of faba bean in northern Sudan. Partial budgeting and marginal analysis indicated that the use of the herbicide imazethapyr in faba bean in northern Sudan is a profitable alternative for farmers. However, if tank-mixed with pendimethalin or oxyfluorfen or if supportive hand weeding is practiced, substantial improvement in yields and benefits would be achieved
Keywords:
Sudan Journal of Agricultural Research Vol. 4(2004) PP. 27-35
