Document Type: Original Article


Department of Plant Protection, Facultyof Agriculture, Ain Shams University, Shoubra El-Kheima, Cairo, Egypt


The aim of the present work is to evaluate the herbicidal activity allelopathic extracts of sorghum plants (Sorghum bicolor L.) on wheat and accompanied weeds namely wild oat and canary grass under local conditions in Egypt. The biocidal activity of the aqueous and methanolic extracts of sorghum was compared with two of the most common herbicides used on wheat i.e. diclofop-methyl and clodinafop-propargyl. Application of the tested materials was carried out by using three concentrations of sorghum extracts (5, 10 and 20%) and the recommended dose of each diclofop-methyl (750 ml/fed) and clodinafop-propargyl (140 gm/fed) under laboratory, green house and semi field conditions. The herbicidal and phytotoxic effects of both biochemical agents and conventional herbicides were carried out by measuring germination percentage, seedling shoots and root length, dry weight, chlorophyll content, plant height, plant numbers, spike length and spike weight of the treated wheat. The obtained results indicated that there is no adverse effect of the tested extracts against the measured parameters of productivity and yield of wheat. At the same time promising herbicidal activity of aqueous and methanolic extracts of sorghum was revealed against wild oat and canary grass in particular with aqueous extract of sorghum at concentration of 20%.


Ahmad S, Cheema Z.A, Mehmood A. 1991. Response of some rabi weeds in wheat to allelopathic effects of irrigated sorghum in a sorghum wheat cropping systems. Pak. J. Weed Sci. Res. 4: 81-88.

Arif M, Cheema Z.A, Khaliq A, Hassan A. 2015. Organic weed management in wheat through allelopathy. Int. J. Agri. Biology. 17(1): 127-134.

Asgharipour M.R, Armin M. 2010. Inhibitory effects of Sorghum halepens root and leaf extracts on germination and early seedling growth of widely used medicinal plants. Adv Environ Biol. 4(2): 316-324.

Bhowmik P.C, Inderjit. 2003. Challenges and opportunities in implementing allelopathy for natural weed management. Crop Prot. 22: 661-671.

Bibi S, Marwat K.B, Hassan G, Khan M. 2008. Effect of herbicides and wheat population on control of weeds in wheat. Pak J. Plant Sci. 14: 59-65.

Cheema Z.A, Khaliq A. 2000. Use of sorghum allelopathic properties to control weeds in irrigated wheat in a semi-arid region of Punjab. Agric. Ecosys. Environ. 79: 105–112.

Cheema Z.A, Sadiq H.M.I, Khaliq A. 2000. Efficacy of sorgaab (sorghum water extract) as a natural weed inhibitor in wheat. Int. J. Agri. Biology. 2: 1-2.                                            

Cheema Z.A, Khaliq A, Akhtar S. 2001. Use of sorgaab (sorghum water extract) as a natural weed inhibitor in spring Mungbean. Int. J. Agri. Biology. 3(4): 12-18.

Chung I.M, Ahn J.K, Yun S.J. 2001. Identification of allelopathic compounds from rice (Oryza sativa L.) straw and their biological activity. Can. J. Plant Sci. 81: 815-819.

El-Metwally I.M, El-Rokiek K.G. 2007. Response of wheat plants and accompanied weeds to some new herbicides alone or combined in sequence. Arab Univ. J. Agri  Sci. 15 (2): 513-525.

El-Rokiek K.G, El-Shahawy T.A, Sharara F.A. 2006. New approach to use rice straw waste for weed control. II.the effect of rice straw extract and fusilade (herbicide) on some weeds infesting soybean (Glysin max L.). Int. J. Agri. Biol. 8(2): 269-275.

Gill L.S, Anoliefo G.O, Iduoze U.V. 1993. Allelopathic effect of aqueous extracts of Siam weed on growth of cowpea. Chromoleena Newsletters 8.1.

Guenzi W.D, McCalla T.M. 1966. Phenolic acids in oat, wheat, sorghum and corn residues and their phytotoxicity. Agron. J. 58: 303–304.

Haskins F.A, Gorz H.J. 1985. Dhurrin and p-hydroxy benzaldehyde in seedlings of various sorghum species. Phytochemistry. 24:  597-598.

Hassan G, Hanif Z, Lateef M, Khan M.I, Khan S.A. 2005. Tolerance of avena fatua and phalaris minor to some graminacides. Pak. J. Weed Sci. Res. 11(1-2): 69-73.

Heap I. 2007. The international survey of herbicide resistant weeds, weed

Khatam A, Khan M.Z, Nawab K, Mian I.A. 2013. Effect of various herbicides and manual control on yield, yield components and weeds of maize. Pak J. Weed Sci. 9: 654-662.

Mahmood A, Cheema A.Z, Khaliq A, Hassan A.U. 2010. Evaluating the potential of allelopathic plant water extracts in suppressing horse purslane growth. Int. J. Agri. Biology. 12: 581-585.

Marwat K.B, Seed M, Hussain Z, Gul B. 2005. Chemical weed management in wheat in rainfed areas I. Pak. J. Weed Sci. Res. 11: 31-36.

Nimbal C.I, Pedersen J.F, Yerkes C.N, Weston L.A, Weller  S.C. 1996. Phytotoxicity and distribution of sorgoleone in grain sorghum germplasm. J. Agr. Food Chem. 44: 1343-1347.

Panahyan-e-Kivi M, Tobeh A. Shahverdikandi M.A, Jamaati-e-Somarin S. 2010. Inhibitory impact of some crop plants extracts on germination and growth of wheat. Am-Euras J. Agri. Environ. 9 (1): 47-51.

Randhawa M.A, Cheema Z.A, Anjumali M. 2002. Allelopathic effect of sorghum water extract on the germination and seedling growth of Trianthema Portulacastrum. Int. J. Agri. Biol sci. 4(3): 383-384.

Ronald E. 2000. Hand book of chemical risk assessment: health hazards to humans, plants and animals (Vol. II), Lewis Publishers, Washington DC, USA.

Shehzad M.A, Maqsood M, Anwar-ul-Haq M, Niaz A. 2012.  Efficacy of various herbicides against weeds in wheat (Triticum aestivum L.). African. J. Biotechnol. 11(4): 791-799.