Dr. Kowthar Gad Ali El-Rokiek
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Dr. Kowthar Gad Ali El-Rokiek

Research Professor
National Research Center, Egypt

Highest Degree
Ph.D. in Bioherbicides from Ain Shams University, Cairo, Egypt

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Area of Interest:

Plant and Soil Sciences
100%
Botany
62%
Phytotoxins
90%
Allelopathy
75%
Herbicides
55%

Research Publications in Numbers

Books
0
Chapters
0
Articles
0
Abstracts
0

Selected Publications

  1. El-Sawi, S.A., M.E. Ibrahim, K.G. El-Rokiek and S.A. El-Din, 2019. Allelopathic potential of essential oils isolated from peels of three citrus species. Ann. Agric. Sci., 64: 89-94.
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  2. El-Rokiek, K.G., S.A.S. El-Din, M.A. El-Wakeel, M.E.S. El-Awadi and M.G. Dawood, 2019. Allelopathic potential of the pea seed powder as natural herbicide for controlling weeds infested wheat plants. Bull. Nat. Res. Centre, vOL. 43. .
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  3. El-Rokiek, K.G., M.G. Dawood, M.S. Sadak and M.E.S. El-Awadi, 2019. The effect of the natural extracts of garlic or Eucalyptus on the growth, yield and some chemical constituents in quinoa plants. Bull. Natl. Res. Centre, Vol. 43. 10.1186/s42269-019-0161-3.
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  4. El-Metwally, I.M. and K.G. El-Rokiek, 2019. Eucalyptus citriodora leaf extract as a source of allelochemicals for weed control in pea fields compared with some chemical herbicides. J. Plant Protect. Res., 59: 392-399.
  5. El-Masry, R.R., S.A.A. Ahmed, K.G. El-Rokiek, N.K. Messiha and S.A. Mohamed, 2019. Allelopathic activity of the leaf powder of Ficus nitida on the growth and yield of Vicia faba and associated weeds. Bull. Nat. Res. Centre, .
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  6. El-Awadi, M.E.S., M.S. Sadak, K.G.A. El-Rorkiek and M.G. Dawood, 2019. Physiological response of two wheat cultivars grown under sandy soil conditions to aspartic acid application. J. Applied Sci., 19: 811-817.
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  7. El Wakeel, M.A., M.G. Dawood, K.G. El-Rokiek, M.E.S. El-Awadi and S.A.S. El-Din, 2019. Use of Beta vulgaris allelopathic properties to control some weeds associated with Lupinus albus plant comparing with two recommended herbicides. Agric. Eng. Int. J., 21: 216-222.
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  8. El-Rokiek, K.G., S.A.S. El-Din, M.A. El-Wakeel, M.G. Dawood and M.E. El-Awadi, 2018. Allelopathic effect of the two medicinal plants Plectranthus amboinicus (Lour.) and Ocimum basilicum L. on the growth of Pisum sativum L. and associated weeds. Middle East J. Agric. Res., 7: 1146-1153.
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  9. El-Rokiek, K.G., R.R. El-Masry, S.A.A. Ahmed, S.A. Mohamed and N.K. Messiha, 2018. Allelopathic effects of Allium sativum cloves on growth and yield of Helianthus annuus plants associating Cyperus rotundus. Int. J. Environ., 7: 78-86.
  10. El-Awadi, M.E., M.G. Dawood, Y.R. Abdel-Baky and K.G. El-Rokiek, 2018. Investigations of growth promoting activity of some phenolic acids. Agric. Eng. Int.: CIGR J., Special Issue: 53-60.
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  11. Ahmed, S.A.A., R.R. El-Masry, N.K. Messiha and K.G. El-Rokiek, 2018. Evaluating the allelopathic efficiency of the seed powder of Raphanus sativus L. in controlling some weeds associating Phaseolus vulgaris L. Int. J. Environ. Res., 7: 87-94.
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  12. El-Rokiek, K.G., R.A. Eid, A.N. Shehata and S.A.S. El-Din, 2017. Evaluation of using Moringa oleifera on controlling weeds. i. Effect of leaf and seed water extracts of Moringa oleifera on broad and grassy weed associated Narcissus tazetta L. Agric. Eng. Int. J., 19: 45-52.
  13. El-Rokiek, K.G. and S.A.S. El-Din, 2017. Allelopathic activity of eucalyptus globulus leaf water extract on pisum sativum growth, yield and associated weeds. Middle East J. Applied Sci., 7: 907-913.
  14. El-Rokiek K.G., S.A.A.Ahmed, N.K. Messiha, S.A. Mohamed and R.R. El-Masry, 2017. Controlling the Grassy weed Avena fatua associating wheat plants with the seed powder of two brassicaceae plants Brassica rapa and Sinapis alba. Middle East J. Agric. Res., 6: 1014-1020.
  15. El-Rokiek, K.G., S.A.S. El-Din, A.N. Shehata and S.A.M. El-Sawi, 2016. A study on controlling Setaria viridis and Corchorus olitorius associated with Phaseolus vulgaris growth using natural extracts of Chenopodium album. J. Plant Protect. Res., 56: 186-192.
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  16. El-Rokiek, K.G., E.R. El-Desoki, I.M. El-Metwally and M.G. Dawood, 2016. Allelopathic effect of mango leaf residue against Portulaca oleracea or Chorchorus olitorius associated Phaseolus vulgaris growth. Res. J. Pharmaceut. Biol. Chem. Sci., 7: 964-970.
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  17. El-Nagdi1, W.M.A., M.M.A. Youssef and K.G. El-Rokiek, 2016. Allelopathic effect of dry leaves of lantana and guava for controlling root knot nematode, Meloidogyne incognita on cowpea and some associated weeds. Int. J. Chem. Res., 9: 55-62.
  18. Ahmed, S.A.A., N.K. Messiha, K.G. El-Rokiek, S.A. Mohamed and R.R. El-Masry, 2016. The allelopathic efficiency of two Brassicaceae plant seeds in controlling weeds associating sunflower plants. Res. J. Pharm. Biol. Chem. Sci., 7: 158-165.
  19. El-Rokiek, K.G., I.M. El-Metwally, N.K. Messiha and S.E.D.S. Amin, 2015. Controlling Orobanche crenata in Faba bean using the Herbicides Glyphosate and Imazapic with some additives. Int. J. Chem. Tech. Res., 8: 18-26.
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  20. El-Masry, R.R., N.K. Messiha, K.G. El-Rokiek, S.A. Ahmed and S.A. Mohamed, 2015. The allelopathic effect of Eruca sativa Mill. Seed powder on growth and yield of Phaseolus vulgaris and associated weeds. Curr. Sci.Int., 4: 485-490.
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  21. Sadak, M.S., S.R. El-Lethy, M.A. Ahmed and K.G. El-Rokiek, 2014. Response of two cultivars of wheat plant to foliar treatment of glutathione. Middle East J., 3: 732-737.
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  22. El-Rokiek, K.G., S.A. El-Din, M.K. Nadia and F.A.A. Sharara, 2014. Effect of guava leaf residue on broad and narrow leaved weeds associated wheat plants. Int. J. Agric. Res., 9: 356-363.
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  23. El-Awadi, M.E., S.R. El-Lethy and K.G. El-Rokiek, 2014. Effect of the two antioxidants; Glutathione and ascorbic acid on vegetative growth, yield and some biochemical changes in two wheat. J. Plant Sci., 2: 215-221.
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  24. Ahmed, S.A., K.G. El-Rokiek, R.R. El-Masry and N.K. Messiha, 2014. The efficiency of allelochemicals in the seed powder of Eruca sativa in controlling weeds in Pisum sativum. Middle East. J. Agric. Res., 3: 757-762.
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  25. Messiha, N.K., S.A. Ahmed, K.G. El-Rokiek, M.G. Dawood and R.R. El-Masry, 2013. The physiological influence of allelochemicals in two Brassicaceae plant seeds on the growth and propagative capacity of Cyperus rotundus and Zea mays L. World Applied Sci. J., 26: 1142-1149.
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  26. El-Rokiek, K.G., M.T. Abdelhamid and S.S. El-Din, 2013. Physiological response of purslane weed (Portulaca oleracea) and two common beans (Phaseolus vulgaris) recombinant inbred lines to Phosphorus fertilizer and bentazon herbicide. J. Applied Sci. Res., 9: 2743-2749.
  27. El-Rokiek, K.G., M.G. Dawood and N. Gad, 2013. Physiological response of two sunflower cultivars and associated weeds to some herbicides. J. Applied Sci. Res., 9: 2825-2832.
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  28. El-Rokiek, K.G., W.M. El-Nagdi and R.R. El-Masry, 2012. Controlling of Portulaca oleracea and Meloidogyne incognita infecting sunflower using leaf extracts of Psidium guava. Arch. Phytopathol. Plant Prot., 45: 2369-2385.
    CrossRef  |  
  29. El-Rokiek, K.G., M.E. El-Awadi and M.S.A. Abd El-Wahed, 2012. Physiological responses of wheat plants and accompanied weeds to derby herbicide and β-sitosterol bioregulator. J. Applied Sci. Res., 8: 1918-1926.
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  30. Dawood, M.G., M.E. El-Awadi and K.G. El-Rokiek, 2012. Physiological impact of fenugreek, guava and lantana on the growth and some chemical parameters of sunflower plants and associated weeds. J. Am. Sci., 8: 166-174.
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  31. Ahmed, S.A., N.K. Messiha, R.R. Ei-Masry and K.G. Ei-Rokiek, 2012. Allelopathic potentiality of the leaf powder of Morus alba and Vitis vinifera on the growth and propagative capacity of purple nutsedge (Cyperus rotundus L.) and maize (Zea mays L.). J. Applied Sci. Res., .
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  32. Sharara, F.A., T.A. El-Shahawy and K.G. El-Rokiek, 2011. Effect of prometryn/benzoic acid combination on weeds, seed yield and yield components in lentil (Lens culinaris L.). Electron. J. Polish Agric. Univ., 14, No. 1. .
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  33. Sharara, F.A., K.G. El-Rokiek and S.S. Gaweesh, 2011. Effect of soil fumigation on growth, development, yield of wheat (Triticum aestivum, L) and associated weeds. Int. J. Acad. Res., 3: 781-786.
  34. El-Rokiek, K.G., N.K. Messiha, R.R. El-Masry and S.S. El-Din, 2011. Evaluating the leaf residues of Eucalyptus globulus and Mangifera indica on growth of Cynodon dactylon and Echinochloa colonum. J. Applied Sci. Res., .
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  35. El-Rokiek, K.G., A.E. Rawia and L.S. Taha, 2011. Allelopathic effects of croton leaves residue on jasmine trees and associated weeds. J. Appl. Sci. Res., 7: 948-954.
  36. El-Rokiek, K. and W. El-Nagdi, 2011. Dual effects of leaf extracts of Eucalyptus citriodora on controlling purslane and root-knot nematode in sunflower. J. Plant Protect. Res., 51: 121-129.
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  37. Mekki, B.B., F.A.A. Sharara and K.G. El-Rokiek, 2010. Effect of weed control treatments on yield and seed quality of some canola cultivars and associated weeds in newly reclaimed sandy soils. Am. Eur. J. Agric. Environ. Sci., 7: 202-209.
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  38. El-Rokiek, K.G., R.R. El-Masry, N.K. Messiha and S.A. Ahmed, 2010. The allelopathic effect of mango leaves on the growth and propagative capacity of purple nutsedge (Cyperus rotundus L.). J. Am. Sci., 6: 151-159.
    Direct Link  |  
  39. El-Rokiek, K., S. El-Din and F. Sharara, 2010. Allelopathic behaviour of Cyperus rotundus L. on both Chorchorus olitorius (broad leaved weed) and Echinochloa crus-galli (grassy weed) associated with soybean. J. Plant Prot. Res., 50: 274-279.
    CrossRef  |  
  40. El-Metwally, I.M., K.G. El-Rokiek, S.A. Ahmed, E.R. El–Desoki and E.E.H. Abd-Elsamad, 2010. Effect of adding urea or ammonium sulphate on some herbicides efficiency in controlling weeds in onion plants. J. Am. Sci., 6: 536-543.
  41. El-Rokiek, K.G., S. El-Din, A. Samia, M.K. Nadia and R.R. El- Masry, 2009. Effect of growth regulators, alar or trichlorobenzoic acid and the herbicide basagran on the growth and propagative capacity of purple nutsedge (Cyperus rotundus L). Ann. Agric. Sci. Ain Shams Univ. Cairo, 54: 59-75.
  42. El-Rokiek, K.G. and R.A. Eid, 2009. Allelopathic effects of Eucalyptus citriodora on Amaryllis and associated grassy weed. Planta Daninha, 27: 887-899.
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  43. El-Shahawy, T.A., K.G. El-Rokiek, L.K. Balbaa and S.M. Abbas, 2008. Micronutrients, B-vitamins and yeast in relation to increasing flax (Linum usitatissimum L.) growth, yield productivity and controlling associated weeds. Asian J. Agric. 2: 1-14.
  44. El-Shahawy, T.A., L.K. Balbaa and K.G. El-Rokiek, 2007. The ability of glutathione and ascorbic acid to increasing growth vigor and enhancing allelopathic capability of marjoram (Origanum majorana L.) against growth retardatory weeds. Int. J. Agric. Res., 2: 411-425.
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  45. El-Rokiek, K.G., T.A. El-Shahawy and L.K. Balbaa, 2007. α- Tocopherol-does play a significant role on affecting the herbicide efficacy of grasp for controlling weeds and increasing growth in barley. Int. J. Agric. Res., 2: 312-324.
  46. El-Rokiek, K.G., I.M. El-Metwally, N.K. Messiha and S.A. El-Din, 2007. Influence of some herbicides on the growth and propagative capacity of purple nutsedge (Cyperus rotundus L.). J. Agric. Sci. Mansoura Univ., 32: 2477-2489.
  47. El-Rokiek, K.G., 2007. Evaluating the physiological influence of benzoic and cinnamic acids, alone or in combination on wheat and some infested weeds comparing with the herbicide isoproturon. Ann. Agric. Sci., 52: 45-58.
  48. El-Metwally, I.M. and K.G. El-Rokiek, 2007. Response of wheat plants and accompanied weeds to some new herbicides alone or combined in sequence. Arab Univ. J. Agric. Sci., 15: 513-525.
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  49. El-Shahawy, T.A., K.G. El-Rokiek, F.A. Sharara and K.A. Khalaf, 2006. New approach to use rice straw waste for weed control I. Efficacy of rice straw extract against broad and narrow leaved weeds in cucumber (Cucumis sativus L.). Int. j. Agric. Biol., 8: 262-268.
  50. El-Rokiek, K.G., T.A. El-Shahawy and F.A. Sharara, 2006. New approach to use rice straw waste for weed control. II. The effect of rice straw extract and fusilade herbicide on controlling some weeds infested soybean (Glysine max L.). Int. J. Agric. Biol., 8: 269-275.
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  51. El-Rokiek, K.G., S. El-Din, A. Samia and R.R. El-Masry, 2006. Improving the control of purple nutsedge (Cyperus rotundus L.) with glyphosate by pre conditioning treatment with benzyladenine. Egypt. J. Applied Sci., 21: 79-96.
  52. Sharara, F.A., T.A. El-Shahawy and K.G. El-Rokiek, 2005. Effect of some novel herbicides on the controlling weeds associated with maize plants. J. Agron., 4: 88-95.
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  53. Hassan, E.A., K. Gad and M. El-Awady, 2003. Study on weedy amarathus plants in Egypt. Egypt. J. Appl. Sci., 18: 619-632.