Document Type : Original Article


1 Crop Protection Research Program, Bako Agricultural Research Center, Oromia Agricultural Research Institute, Ethiopia

2 Department of Horticulture and Plant Sciences, College of Agriculture and Veternary Medicine, Jimma University, Jimma, Ethiopia

3 Weed Science Research Program, Melkassa Agricultural Research Center, Adama, Ethiopia

4 Crop Breeding and Genetics Research Program, Bako Agricultural Research Center, Oromia Agricultural Research Institute, Ethiopia


A field experiment was undertaken to determine optimum combination of weed management practices and inter-row spacing levels for effective weed control in maize at Bako agricultural research center, Western Oromia, Ethiopia during 2018 main cropping season. The treatments included pre-emergence s-metolachlor 290 g/L + atrazine 370 g/L (1.0, 2.0 and 3.0 L ha-1), hand pulling and hoeing 25 and 45 days after sowing (DAS) and weedy check in combination with inter-row spacing levels (65, 70, 75, and 80 cm). The experiment was laid out in a randomized complete block design with a factorial arrangement in three replications. The experimental field was infested with 22 weed species belonging to 12 families, out of which 77.3 %, 18.2 % and 4.5 % were broad leaved, grass and sedges, respectively. Weed management practices (WMP), inter-row spacing (IRS) and their interaction significantly influenced the weed density, dry weight and weed control efficiency at 25 and 70 DAS. All parameters of the crop were significantly affected by WMP and IRS. However, their interaction was non-significant except for number of ear per plant and grain yield. The highest grain yield was recorded in inter-row spacing of 65 cm treated with hand pulling and hoeing 25 and 45 DAS (10492.0 kg ha-1). Whereas, the lowest grain yield (2237.0 kg ha-1) was obtained from weedy check plot at 80 cm inter-row spacing. On the other hand, maize planted at 65 cm IRS in combination with 2 L ha-1 s-metolachlor 290g/L + atrazine 370 g/L gave comparable grain yield which was statistically at par with that of hand pulling and hoeing 25 and 45 DAS and 3 L ha-1 s-metolachlor 290g/l. + atrazine 370 g/L involving the same IRS. Hence, putting the environmental concern and scarce labor force under consideration, the use of reduced rate (2 L ha-1) of herbicide in combination with narrower IRS would be the best option for effective weed management in maize. Furthermore, integration of narrower IRS with other weed management treatments enhance maize grain yield there by improving weed control efficiency.


Abuzar M.R, Sadozai G.U, Baloch M.S, Baloch A.A, Shah I.H, Javaid T, Hussain N.  2011. Effect of Plant Population Densities on Yield of Maize. J. Anim. Plant Sci. 21(4): 692-695.
Amir K, Muhammad Z, Khalid N, Ishaq M, Wiqar A. 2013. Effect of various herbicides and manual control on yield, yield components and weeds of maize.Pak. J. Weed Sci. Res.19(2): 209-216.
Begna H, Hamilton R, Dywer M, Stewart W, Cloutier D, Assemat L, Foroutan-Pour K, Smith D. 2001. Weed biomass production response to plant spacing and corn (Zea mays) hybrids differing in canopy architecture. Weed Technology. 15: 647-653.
Biru A. 1976. Agronomy research manual. Part II-Information for special trial for particular crops.
CIMMYT. 2004. Second semiannual progress report for the quality protein maize development project for the Horn and East Africa (XP 31519).
Cruz E.D, Moody K, Ramos M.B. 1986. Reducing variability in sampling weeds in transplant aman rice (Oryza sativa L.). Philippines J. Weed Sci. 13: 56-59
CSA (Central Statistical Agency). 2017. Agricultural Sample Survey Area and Production of Major Crops (Private Peasant Holdings, Meher Season). Addis Ababa, Ethiopia, pp. 1–112.
Douglas D.B. 2002. Challenges and opportunities for integrated weed management. Weed Sci. 50: 273-80.
El-Naim A.M, Ahmed S.E. 2010. Effect of weeding frequencies on growth and yield of two roselle (Hibiscus sabdariffa L) Varieties under rain fed. AJBAS. 4(9): 4250-4255.
Fanadzo M, Chiduza C, Mnkeni P.S. 2010. Effect of inter-row spacing and plant population on weed dynamics and maize (Zea mays L.) yield at Zanyokwe irrigation scheme, Easter Cape, South Africa. Afr J Agric Res. 5(7): 518-523.
Fanadzo M. 2007. Weed management by small-scale irrigation farmers: The story of Zanyokwe. SA Irrigation. 29 (6): 20-24.
FAO (Food and Agriculture Organization). 2017. Statistical databases and data-sets of the Food and Agriculture Organization of the United Nations. Accessed 18 Dec 2017.
Farkas A. 2006. Soil management and tillage possibilities in weed control. Herbologia. 7(1): 9-23.
Fassil R, Matias M, Rezene F, Tamado T.  2006. Weed research in sorghum and maize. In:proceeding of the 14th annual conference of the plant protection society of Ethiopia (PPSE); Abraham Tadesse (eds.). Addis Ababa, Ethiopia. Pp. 303-323.
Francis C.A, Rutger J.N, palmer A.F. 1969. Rapid method for plant leaf area estimation in maize. Crop sci. 9:537-539.
Frehiwot S, Sharma J.J, Mashilla D. 2013. Effect of Herbicides and their Application Rates on Weeds and Yield of Maize (Zea mays L.). Eth. J.Weed Mgt. 6: 73-84.
Getahun D. 2017. Determination of plant density and weeding frequency effect on weed control and productivity of maize at Assosa district, Benishangul Gumuz Regional State, Ethiopia. M.Sc. thesis, Ambo University, Ethiopia.
Hussein F.A, El-Metwally I.M, El-Desoki E.R. 2008. Effect of Plant Spacing and Weed Control Treatments on Maize Yield and Associated Weeds in Sandy Soils. J. Agric. & Environ. Sci. 4 (1): 09-17
Macauley H, Ramadjita T. 2015. Cereal crops: rice, maize, millet, sorghum and wheat: background paper. Conference on ‘Feeding Africa’ Dakar, Senegal.
Maqbool M.M, Tanveer A, Ata Z, Ahmad R. 2006. Growth and yield of maize (Zea mays L.) as affected by row spacing and weed competition durations. Pak. J. bot. 38 (4): 1227-1236.
Mahadi M.A. 2014. Growth, Nutrient Uptake and Yield of Maize (Zea Mays L.) as Influenced by Weed Control and Poultry Manure. Int. J. Sci Nat. 5(1):  94-10.
Megersa K, Gudeta B, Fufa A. 2018. Integration of Glyphosates and Hand Weeding for Weeds Management in Maize (Zea mays. L). Agri Res & Tech. 18(5): 1-6.
Megersa K, Fufa A. 2017. Efficacy of Pre-emergence Herbicides for the Control of Major Weeds in Maize (Zea mays L.) at Bako, Western Oromia, Ethiopia. AJAR. 5(5): 173-180.
Nadeem M.A, Tufail M.S, Tahir, M. 2006. Effect of different herbicides on growth and yield of spring maize (Zea mays L.). In: International Symposium on Sustainable Crop Improvement and Integrated Management, Faisalabad. Faisalabad: University of Agriculture.
Pritam O, Bhutada. 2015. Present senior of weed management in maize. Int J Adv Res. 3(3): 266-268
Patel V.J, Upadhyay P.N, Patel J.B, Meisuriya M.I. 2006. Effect of Herbicide mixtures on weeds in kharif maize (Zea Mays L.) under Middle Gujarat conditions. Indian J. Weed Sci. 38(1/2): 54-57.
Radford P.J. 1967. Growth analyses formula - their use and abuse. Crop Sci. 7:171-175.
Simić M, Dragičević V, Brankov M. 2017. Influence of growing measures on weed interference and water status in maize. Pestic. Phytomed. 32(2): 113–120
Simić M, Dolijanović Ž, Maletić R, Stefanović L, Filipović M. 2012. Weed suppression and crop productivity by different arrangement patterns of maize. Plant, Soil Environ. 58(3): 148-153.
Simić M, Stefanović L. 2007. Effects of maize density and sowing pattern on weed suppression and maize grain yield. Pesticides & Phytomedicine. 22(2): 93-103.
Soliman I.E, Gharib H.S. 2011. Response of weeds and maize (Zea mays L.) to some weed control treatments under different nitrogen fertilizer rates. Zagazig J. Agric. Res. 38(2): 249-271.
Tadious T, Bogale T. 1994. Effect of different weed management methods on grain yield of maize in western Ethiopia. CIMMYT, Mexico. pp. 223-228.
Teasdale J.R.1995. “Influence of narrow row/high population corn (Zea mays) on weed  control and light transmittance. Weed Technol. 9(1): 113-118.
Teymoori M, Mohammad A, Eskandar Z, Hamid M, Saeed M. 2013. Weed management in maize field by chemical, mechanical and cultural methods. Res Crops. 14(3): 729-735.
Uremis I, Uludag A, Ulger A.C, Cakir B. 2009. Determination of critical period for weed control in the second crop corn under Mediterranean conditions. AJB. 8(18): 4475-4480.
Zamir M.S, Ahmad A.H, Javeed H.M, Latif T. 2011. Growth and yield behavior of two maize hybrids towards different plant spacing. Cercetări Agronomice. 14(2): 33-40.
Zhang J, Weaver S.E, Hamil A.S. 2002. Risks and reliability of using herbicides at below-labeled rates. Weed Technol. 14: 106-15.