Effect of repeated spraying and efficacy of some herbicides on weed control and yield of alfalfa (Medicago sativa)

Document Type : Research Paper

Authors

1 Plant Protection Research Department, Fars Agricultural and Natural Resources Research and Education Center, AREEO, Shiraz,

2 Weed Research Department , Iranian Plant Pest Research Institute, AREEO, Tehran, Iran

Abstract

To study the effect of herbicides in alfalfa weed control in South Kerman, an experiment was conducted in a randomized complete blocks design with three replications in the Agricultural Research and Education Center, Jiroft, Iran during 2013-2014. Treatments included application of once and twice 5 L/ha EPTC herbicide, 750 g/ha metribuzin, 3 and 3.5 L/ha 2, 4-DB, 3 L/ha bentazon, 0.5 L/ha imazethapyr plus 200 ml/ha Citogate and 1 L/ha imazethapyr as post- emergence, and weed infested as control. Results showed that herbicide applications had significant effects on density and dry weight of weeds and alfalfa dry weight. Herbicide applications significantly decreased density and dry weight of weeds. Once and twice spray application of imazethapyr (1 and 0.5 L/ha) had a good efficiency in weed control. Also, once and twice spray application of 1 L/ha imazethapyr reduced weed dry weights 78 and 77% in the first, 78 and 77% in the second, and 86 and 82% in the third alfalfa harvest . Imazethapyr and EPTC herbicides had no alfalfa leaf injury and increased dry weight of alfalfa during three harvests. Although, 2, 4-DB herbicide showed good weed control, but these treatments had leaf injury in the first alfalfa harvest. Twice and once spray application of imazethapyr (1 L/ha) resulted in the highestalfalfa yield. This treatment increased alfalfa biomass 32 and 28% in the first, 30 and 28% in the second and 33 and 30% in the third harvests. Therefore, once spray application of 1 L/ha imazethapyr is recommended because of its efficiency in weed control and yield increasing.

Keywords


Amiri, S., Karimmojeni, H. and Majidi, M.M. 2012. Weed control in Sainfoin crop using bentazon and imazethapyr herbicides in combination with adjutants. Proceedings of the 4th Iranian Weed Science Congress, Chemical Management. 6-8 February, Ahvaz, Iran. (In Persian with English summer).
Baghestani, M.A., Zand, E. Soufizadeh, S. Eskandari, A. Pourazar,R. Vaysi, M. and Nassirzadeh, N.. 2007. Efficacy evaluation of some dual purpose herbicides to control weeds in maize (Zea mays L.). Crop Prot. 26: 936-942.
Barnes, D.K. and Sheaffer, C.C. 1995. Forage Legumes and Grasses. Alfalfa. Forages: An Introduction to Grassland Agriculture. 205-216 Pp.
Canevari, W.M., Orloff, S.B., Vargas, R.N. and Hembree, K.J. 2003. Raptor, a new herbicide for alfalfa weed control. California Weed Sci. Soci. 55:107-111.
Curran, W., Hall, M. and Werner, E. 1999. Effect of varying Imazethapyr application rate and timing on yield of seedling grass alfalfa mixtures. J.  Prod. Agric. 12: 244-248.
Ghadiri, H. 2004. Weed science, Principles and Methods. Shiraz University Press. 700 Pp.
Ghazanfari, S.A., Aryan-Nia, N. and Lorzadeh, S. 2013. Effect of some post emergence herbicides on weed control in alfalfa under Abadan climate conditions. J. Crop Prod. Res. 5(1): 23-34.
Hossein-Noori, A., Meighani, F., Pazooki, A. and KaramiNejad, M.R. 2013. Chemical control of new cultivated alfalfa (Medicago sativa L.) in Karaj. Proceedings of the 5th Iranian Weed Science Congress. Weeds and Herbicide Management. 24-26 August, 2013. Karaj, Iran. 1: 656-661. (In Persian with English summer)
Hoy, M.D., Moore, K.J., Ronald, G.J. and Charles, B.E. 2000. Alfalfa yield and quality as influenced by establishment method. Agron. J. 94(1): 65-71.
MAJ, 2017. Crop production. Agriculture of Statistic Database. Agriculture Products. Ministry of Jihad-e-Agric. 1: 137 Pp. (In Persia) Available online at http//www.agri-jahad.ir.
Mamnoie, E. and Baghestani, M.A. 2014. Evaluating of some herbicides to control Bermudagrass (Cynodon dactylon) and field bindweed (Convolvulus arvensis) in Established Alfalfa (Medicago sativa). Iranian J. Weed Sci. 9: 201-211. (In Persian with English abstract)
Mamnoie, E. and Shimi, P. 2013. Evaluation of some herbicides to weed control in seedling alfalfa. Iranian J. Weed Sci. 8: 13-23. (In Persian with English abstract)
Meighani, F. and Karaminejad, M.R. 2017. Herbicides efficacy in control of broad-leaved weeds in new seeded and established alfalfa (Medicago sativa L.) in Alborz province. J. Plant Prot. 31(4): 592-604. (In Persian with English summary)
Meighani, F., Jahedi, A., Mirvakili, S.M., Shimi, P. and Baghestani, M.A. 2012. Evaluation of chemical control of broad-leaved weeds in new seeded alfalfa (Medicago sativa L.). J. Crops Improv. 14(1): 43-55. (In Persian with English abstract)
Meighani, F., Mirvakili, S.M., Jahedi, A., Baghestani, M.A. and Shimi, P. 2010. Study of 2, 4-DB (Butress) efficacy in weed control in established alfalfa (Medicago sativa). Iranian J. Weed Sci. 2: 67-77. (In Persian with English summary)
Mirvakili, S.M. and Meighani, F. 2010. Investigation of efficiency 2-4DB (Butress) herbicide on weed control of seedling alfalfa in Yazd. Proceedings of the 19th Iranian Plant Protection Congress, Weeds Vol. 3: 131. 31-33 July. 2010, Tehran, Iran. (In Persian with English Summer)
Nakamura, K., Satake, Y. and Bando, T. 1998. Weed control in establishment of alfalfa sward. Bulletin of Hokkaido Prefectural Agriculture Experiment Stations. 75: 47-51.
Raj, V.C, and Patel, Z.G. 1995. Integrated weed management in forage Lucerne (Medicago sativa). Indian J. Agron. 40: 686-688.
Raoofi, M. and Alebrahim, M.T. 2017. Efficiency of herbicides dose in mixture with cytogate for weed control in alfalfa (Medicago sativa). Appl. Ecol. Environ. Res. 15(4): 249-265. (In Persian with English Summer)
Silva, W.D., Vilela, D., Cobucci, T., Heinemann, A.B., Reis, F.A., Pereira, A.V. and Ferreira, R.D.P. 2004. Decreasing of weed plants using herbicides and herbicides mix in alfalfa crop. Ciencia e Agrotecnol. 28: 729-735. (In Brazil with English summary)
Wilson, R. 1994. Effect of imazethapyr on legumes and the effect of legumes on weeds. Weed Technol. 8: 536-540.
Wilson, R.G. 1997. Downy brome (Bromus tectorum) control in established alfalfa (Medicago sativa). Weed Technol. 11: 277-282.
Wilson, R.G. and Burgener, P.A. 2009. Evaluation of glyphosate-tolerant and conventional alfalfa weed control systems during the first year of establishment. Weed Technol. 23:257–263.
Zamora, D., Alby, T. and Lym, R. 1991. Weed control in seedling alfalfa with imazethapyr. 44: 97-98. Proceedings of the Western Society of Weed Science, 12-14 March, 1991. Seattle, Washington, USA.
Zand, E., Baghestani, M.A., Nezamabadi, N. Shimi, P and Mousavi S.K. 2017. A Guide for Herbicides in Iran. University Press Center, 143pp. (In Persian with English summary)