Dr. Khalid A. El-Dougdoug
My Social Links

Dr. Khalid A. El-Dougdoug

Professor
Ain Shams University, Egypt

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

Share this Profile

Area of Interest:

Plant and Soil Sciences
100%
Molecular Biology
62%
Plant Protection
90%
Plant Virology
75%
Microbiology
55%

Research Publications in Numbers

Books
0
Chapters
0
Articles
0
Abstracts
0

Selected Publications

  1. Sofy, A.R., K.A. El-Dougdoug, A.A. Mousa and E.E. Refaey, 2017. Impact of two TYLCV Egyptian isolates on metabolic and antioxidant activities in some tomato cultivars. Int. J. Adv. Res. Biol. Sci., 4: 110-133.
  2. Sofy, A.R., A.A. Hmed, A.M.A. Sharaf and K.A. El-Dougdoug, 2017. Preventative and curative effect of Moringa oleifera aqueous extract to ensure safe natural antimicrobials targeting foodborne pathogens. Arch. Clin. Microbiol., 8: 1-15.
    Direct Link  |  
  3. Lotfy, D.E., A.G. Abdelhamid and K.A. EL-Dougdoug, 2017. Molecular and biological identification of Metarhizium anisopliae EG016 as potential biocontrol agent against Spodoptera exigua (Lepidoptera:Noctuidae). J. Agric. Res., 95: 75-87.
    Direct Link  |  
  4. Hmed, A.A., A.R. Sofy, A.E.M.M. Sharaf and K.A. El-Dougdoug, 2017. Effectiveness of chitosan as naturally-derived antimicrobial fulfill the needs of today’s consumers looking for food without hazards of chemical preservatives. J. Microbiol. Res., 7: 55-67.
    Direct Link  |  
  5. El-Shouny, W.A., L.T. Bugaighis, M.S. Nagm and K.A. El-Dougdoug, 2017. Detection and typing of human papilloma virus in women from benghazi. J. Biol. Chem. Environ. Sci., 10: 255-267.
  6. El-Sayed, M.E., M.M. Hazaa, K.A. El-Dougdoug, M.O.A. Monem and E.E. Elwan, 2017. Control apple fruit fungi using a green biocide neem (Azadirachta indica A.Juss). J. Basic Environ.Sci., 4: 251-259.
  7. El-Saghir, S. and K.A. El-Dougdoug, 2017. Improved quality of viral infected banana plants associated with mycorrhizae and plant stimulants application in nurseries. Egypt. J. Virol., 8: 42-59.
  8. El-Dougdoug, K.A., N.M. El-Aiate, I. Fateh, A. Khalifa and H.A. Nashwa, 2017. Alternative antibiotic assessment against isolated pathogenic salmonella typhi from water resources. RJPBCS, 8: 1984-1996.
  9. Dalia, M. Omar, El-Ibiary, A. Elham, K.A. El-Dougdoug and B.A. Othman, 2017. Evaluation of recombinant avian influenza compared to ordinary inactivated vaccines to induce immune response in chicken. Arab. Univ. Agric. Sci., 4: 54-68.
  10. Tewfike, T.A., H.H. Gomaa and E.A. Nassar, 2016. A novel strategy for removal of pathogenic bacteria for wastewater treatment. J. Pure Applied Microbiol., 10: 129-138.
  11. Sahar-Eissa, A., A.S. Saad, G. Enan and K.A. El-Dougdoug, 2016. Yeast Cells as Antioxidant-Producing Probiotics: Can they emulate Vitamin E on in-vitro protection of human spermatozoa against oxidative stress? Adv. Enviro. Biol., 10: 60-68.
    Direct Link  |  
  12. Sahar-Eissa, A., A.S. Saad, G. Enan and K.A. El-Dougdoug, 2016. Evaluation the using of potential probiotic antibacterial against urogental tract infection in-vitro. Res. J. Pharmaceut. Biol. Chem. Sci., 7: 976-983.
    Direct Link  |  
  13. Khedr, G., A. El-Dougdoug, A. Shaban and I.A. El-Nil, 2016. Bioremediation of heavy metals by pseudomonas putida isolated from groundwater in egypt. Int. J. Sci. Technol. Res., 5: 71-75.
    Direct Link  |  
  14. Abdel-Monem, M.O., T.I. El-Sayed, K.A. El-Dougdoug, M.M. Amer and A.H.H. Abdel-Rrhman, 2016. Interspecific diversity of multidrug resistant Staphylococcus aureus isolates. J. Pure Applied Microbiol., 10: 811-821.
  15. Sofy, A.R. and K.A. El-Dougdoug, 2014. First record of a Hop stunt viroid variant associated with gumming and stem pitting on Citrus volkameriana trunk rootstock in Egypt. New Dis. Rep., 30: 11-11.
    CrossRef  |  Direct Link  |  
  16. Gomaa, H.H.A., E.A.A. Nassar and K.A. El-Dougdoug, 2014. Antiviral diversity of compounds derived from silybum marianum. Egypt. J. Virol., 11: 58-67.
  17. Feisal, A.A., B.A. Othman, K.A. El-Dougdoug and H.F. Shalaby, 2013. Stability of Salmonella typhimurium bacterophaga to some physical and chemical factors. Egypt. J. Virol., 69: 397-407.
  18. Sofy, A.R., A.M. Soliman, A.A. Mousa and K.A. El-Dougdoug, 2012. Molecular characterization and bioinformatics analysis of viroid isolate associated with citrus gummy bark disease in Egypt. Int. J. Virol., 8: 133-150.
    CrossRef  |  Direct Link  |  
  19. Mahfouze, S.A., K.A.F. El-Dougdoug, O.E. El-Sayed, M.A. Gomaa and E.K. Allam, 2012. Genetic diversity of cultivated and wild-type potatoes under potato spindle tuber viroid infection. N. Y. Sci. J., 5: 9-18.
  20. Mahfouze, S.A. and K.A. El-Dougdoug, 2012. Identification of NBS-LRR class Ctv resistance-gene in Egyptian sour orange and lime rootstocks. Acta Horticult., 929: 149-155.
    Direct Link  |  
  21. Shimaa, S. Amer, S.M. Shash , Hazaa , M.M. Amer, K.A. El-dougdoug, 2011. Somatic antigen and serological characterization of E.coli EG isolate. Egypt. J. Applied Sci., 27: 125-135.
  22. Ottai, M.E., M.A. Al-Kordy, J.A.T. Silva and K.A. El-Dougdoug, 2011. Genetic variability and antiphytoviral activity of wild and in breed genotypes of silybum marianum varieties. Int. J. Plant Breed., 5: 48-53.
    Direct Link  |  
  23. El-Sayed, E.H., S.A. Mahfouz, A.D. Shaltout, R.A. Sayed, K.A. El-Dougdoug and R. Abo-Sreea, 2011. Mutation breeding of banana cv Grand-Nane for resistance to some banana viruses using biotechnology and physical mutogens. Afr. J. plant Sci. Biotechnol., .
  24. El-Dougdoug, K.A., M.M. Hazaa and Mostafa, 2011. Surface water sanitation of Pseudomonas aurogenosa utsing Bacteriophage. Egypt. J. Virol. .
  25. El-Dougdoug, K.A., M. Hazaa, M. Swelm, M.R. Tolba and A. Ghamry, 2011. Phenotypic characterization of Escherichia coli diversity through phage typing. Egypt. J. Virol. .
  26. El-Dougdoug, K.A., 2011. In vitro induced chemical mutation for screening of banana bunchy top and banana mosaic viruses resisitance in banana plants. Egypt. J. Virol. .
  27. Sofy, A.R., A.M. Soliman, A.A. Mousa, S.A. Ghazal and K.A. El-Dougdoug, 2010. First record of Citrus viroid II (CVd-II) associated with gummy bark disease in sweet orange (Citrus sinensis) in Egypt. New Dis. Rep., 21: 24-24.
    CrossRef  |  Direct Link  |  
  28. Mahfouze, S.A., K.A. El-Dougdoug and E.K. Allam, 2010. Production of potato spindle tuber viroid-free potato plant materials in vitro. J. Am. Sci., 6: 1570-1577.
    Direct Link  |  
  29. Mahdy, A.M.M., R.N. Fawzy, M.A. Hafez, Eman S.M. Shahwan and K.A. El-Dougdgou, 2010. Induction of salicylic acid against Cucumber mosaic cucumovirus in tomato plants using extract of two of medicinal plants and Kombucha. Egypt. J. Virol., .
  30. Embaby, E.M., M.E. Ragab, K.A. El-Dougdoug, R. Ahmed, A. Zveibil, M. Maymon and S. Freeman, 2010. First report of Colletotrichum acutatum and C. gloeosporioides causing anthracnose diseases on strawberry in Egypt. Plant Pathol., 59: 808-808.
    CrossRef  |  Direct Link  |  
  31. El-Sayed, Y.A., Ghareeb, H.K. Bekheet and K.A. El-Dougdoug, 2010. Molecular characterization and efficacy of Spodoptera exigua nuclear polyhedrosis (SCNPV) virus. 1- Anatomical and scanning changes in Spodoptera exigua infected with SCNPV-EG. Egypt. J. Virol. .
  32. El-Dougdoug, K.A., M.E. Osman, S.A. Hayam, A. Rehab, Dawoud and R.M. Elbaz, 2010. Biological and molecular detection of HSVd-infecting peach and pear trees in Egypt. Austr. J. Basic Appl. Sci., 4: 19-26.
    Direct Link  |  
  33. El-Dougdoug, K.A., M.E. Osman, H.S. Abdelkader, R.A. Dawoud and R.M. Elbaz, 2010. Elimination of Hop stunt viroid (HSVd) from infected peach and pear plants using cold therapy and chemotherapy. Aust. J. Basic Applied Sci., 4: 54-60.
  34. Desoky, S.M., A. Ghareeb, H.K. Bekheet and K.A. El-Dougdoug, 2010. Biological control of potato tuber moth by using granulesis virus. 1- Cytopathic and histopathological effects of infected phthorimded operculella Zeller. Egypt. J. Virol., .
  35. Azzam, M.I., A.S. El-Din-Hakim, B.A. Othman and K.A. El-Dougdoug, 2010. Evaulation of microbial typing as indicators for the efficiency of water treatment stations in El-Menfia Rayeh Egypt. Egypt. J. Virol., 6: 255-272.
  36. Rehab, D.A., A. Hanaa, H.A. Gomaa, M.M. El-Shamy and K.A. El-Dougdoug, 2009. Production of plum pox virus-free peach via tissue culture thermotherapy and chemotherapy approaches. Egypt. J. Virol., 6: 181-199.
  37. Mahfouze, S.A., M.M.M. El-Shamy and K.A. El-Dougdoug, 2009. Molecular variability of tomato cultivars to Potato spindle tuber viroid infection. Aust. J. Basic Applied Sci., 3: 3321-3329.
  38. Hussein, Y.S., K.A. El-Dougdoug, B.A. Othman and M.E. Ragab, 2009. Identification of some strawberry viruses infecting strawberry plants in Egypt. Egyptian J. Virol., 6: 361-377.
  39. Fouad, W.A., I.H. Abbas, K.M. Elwan, M.A. Swellum and K.A. El-Dougdoug, 2009. Biotransformation of progesterone by microbial steroids. J. Applied Sci. Res., 5: 137-143.
    Direct Link  |  
  40. El-Dougdoug, K.A., S.A. Ghazal, A.A. Mousa, H. Fahmy and A.R. Sofy, 2009. Differentiation among three Egyptian isolates of citrus psorosis virus. Int. J. Virol., 5: 49-63.
    Direct Link  |  
  41. El-Dougdoug, K.A., R.A. Dawood, M.M.M. El-Shamy and H.M. Korkar, 2009. Eradication of banana viruses from naturally infected plants 3.Disease management of banana through the use of virus-free plant materials. J. Applied Sci. Res., 5: 1872-1880.
    Direct Link  |  
  42. El-Dougdoug, K.A., M.M.M. Shamy and H.M.A. Khalil, 2009. Potency of pseudomonas fluorescens as a biotic inducing inhibitors against cucummber mosaic cucumovirus. Aust J. Basic Applied Sci., 3: 2459-2464.
  43. El-Dougdoug, K.A., H.S. Abd El-Kader, I.A. Hamad, E.A. Ahmed and A.F. Abd El-Monem, 2009. Identification of squash leaf curl virus (Egyptian isolate). Aust. J. Basic Applied Sci., 3: 3470-3478.
    Direct Link  |  
  44. Ghazal, S.A., K.A. El-Dougdoug, A.A. Mousa, H. Fahmy and A.R. Sofy, 2008. Isolation and identification of citrus psorosis virus Egyptian isolate (CPsV-EG). Commun. Agric. Applied Biol. Sci., 73: 285-295.
    Direct Link  |  
  45. Feisal, A.A., B.A. Othman, K.A. El-Dougdoug, H.S. Shalaby and I.S. Aumara, 2008. Monitoring of dairy virulent and temperate bacteriophages in some local manufacteural cheese and yoghurt. Egypt. J. Virol., 5: 47-65.
  46. Sofy, A.R., A.A. Mousa, H. Fahmy, S.A. Ghazal and K.A. El-Dougdoug, 2007. Anatomical and ultrastructural changes in citrus leaves infected with Citrus psorosis virus Egyptian isolate (CPsV-EG). J. Applied Sci. Res., 3: 485-494.
  47. El-Dougdoug, K.A., H.M.S. El-Harthi, H.M. Korkar and R.M. Taha, 2007. Detection of somaclonal variations in banana tissue culture using isozyme and DNA fingerprint analysis. J. Applied Sci. Res., 3: 622-627.
    Direct Link  |  
  48. El-Dougdoug, K.A., H.H.A. Gomaa and R.A. Daoud, 2007. Elimination of some viruses infecting tomato plants by phyto-antivirus. Res. J. Agric. Biol. Sci., 3: 994-1001.
    Direct Link  |  
  49. El-Dougdoug, K.A., H. Mohamed and A. Abo-Senna, 2007. Effect of PVY viral infection on alkaloid contents of cultivated medicinal plants. J. Applied Sci. Res., 3: 558-563.
    Direct Link  |  
  50. Korkar, H.M., H.H. Gomaa and K.A. El-Dougdoug, 2006. Variation of three black cumin cultivars in heritability, chemical composition and antivral activity. Arab Univ. J. Agric. Sci. Ain Shams Univ. Cairo, 14: 59-70.
    Direct Link  |  
  51. Hazaa, M.M., K.A. El-Dougdoug and S.A. El-Maaty, 2006. Eradication of banana viruses from naturally infected banana plants. 2- Production of certified banana plants and virus tested. J. Applied Sci. Res., 2: 714-722.
  52. Gomaa, H.H., M.M. Hazaa, K.A. El-Dougdoug and A. El-Ghaffar, 2006. Effect of Broad bean mottlel virus infection on faba bean nodulation and efficiency of N2-fixation. Arab Univ. J. Agric. Sci. Ain Shams Univ. Cairo, 14: 47-58.
    Direct Link  |  
  53. Elbadry, M., R.M. Taha, K.A. Eldougdoug and H. Gamal-Eldin, 2006. Induction of systemic resistance in faba bean (Vicia faba L.) to Bean yellow mosaic potyvirus (BYMV) via seed bacterization with plant growth promoting rhizobacteria. J. Plant Dis. Prot., 113: 247-251.
    Direct Link  |  
  54. El-Dougdoug, K.A., M.M. Hazaa, H.A.H. Gomaa and S.A. El-Maaty, 2006. Eradication of banana viruses from naturally infected banana plants 1- Biological and molecular detection of Cucumber mosaic virus and Bunchy banana top virus in naturally infected banana plants. J. Applied Sci. Res., 2: 1156-1163.
  55. El-Din, M.A.T, H.A.S. El-Deen and K.A. El-Dougdoug, 2006. Application of protein related index and isozymes in defining Ziccini yellow mosaic potyvirus in infected squash plants. J. Biol. Chem. Environ. Sci., 1: 575-594.
  56. Ali, S.H., S.S. Eisa and K.A. El-Dougdoug, 2006. Role of reactive oxygen species and antioxidants in hypersensitive local virus. Infect. plants J. Agric. Sci. Mansoura Univ., 31: 6465-6480.
  57. Osman, M.E., K.A. El-Dougdoug, E.T.A. El-Salam, H.S. AbdelKader, and E.A. Nassar, 2005. Molecular characterization and expression of banana bract mosaic virus (BBrMV) coat protein gene in E. coli. Egypt. J. Virol., 2: 183-202.
  58. Marei, E.M., M.A. Amer, K.A. El-Dougdoug, B.A. Othaman and E.K. Allam, 2005. Molecular detection of peach latent mosaic viriod Egyptian isolate. Egypt. J. Virol., 2: 315-329.
    Direct Link  |  
  59. Allam , E.K., K.A. El-Dougdoug, A.A. Abou-Zaid, M.A. Amer and S.M. Amin, 2005. Molecular characterization of potato spindle tuber viroid Egyptian isolate. Int. J. Virol., 1: 11-11.
    CrossRef  |  Direct Link  |  
  60. Othman, B.A., K.A. El-Dougdoug, M.A. El-Ghaffar and T.F. El-Arobi, 2004. Isolation and characterization of A double stranded RNA mycovirus from Rhizoctonia solani. Arab Univ. J. Agric. Sci. Ain Shams Univ. Cairo, 12: 81-95.
  61. Osman, M., K.A. El-Dougdoug, E.T.A. El-Salam, R.M. Taha and R.A. Abdel-Hamid, 2004. Histo-pothological infects Cucumber mosaic cucumovirus on squash leaves. Egypt. J. Virol., 1: 343-353.
  62. Gomaa, H.H.A., A.F. Moustafa, K.A. El-Dougdoug, A.A. Abou-Zeid and S.Y.M. Mahmoud, 2004. Physiological and phytopathological changes in Potato virus X and Potato virus Y infected potato plants. Egyptian J. Virol., 1: 355-366.
  63. El-Nasr, M.A.A., K.A. El-Dougdoug, M.H. El-Kattan and E.A. Salem, 2004. Induction of salicylic acid in cucumber against Zucchini yellow mosaic potyvirus by some nutrient chemicals. Egypt. J. Virol., 1: 301-312.
  64. El-Nasr, M.A.A., K.A. El-Dougdoug, Hayam, S.A. El-Kader and R.A. Dawoud, 2004. Molecular cloning and expression of the coat protein gene of Plum pox virus El-Amar strain in E. coli. Egypt. J. Virol., 1: 25-38.
  65. El-Komy, S.O.O., S.Y.M. Mahmud and K.A. El-Dougdoug, 2004. Survey of virus infection and aphid infestation on some weed plants and their possible role in virus diseases epidemiology. Minufiya J. Agric. Res., 1: 235-253.
  66. El-Dougdoug, K.A., M. Abdel-Ghaffar, R.M. Taha and M.N. Hazaa, 2004. Detection and cytopathic effect of Potato sindle tuber viroid infecting potato plants. Egypt. J. Biotechnol. 77: 193-205.
  67. Mahmoud, S.Y., K.A. El-Dougdoug, M.H.A. El-Gaffar and A.S. Aly, 2003. Inhibitory effect on chintosan and derives on some plant viruses. N. Egypt. J. Microbiol., 4: 108-124.
  68. El-Dougdoug, K.A., G.M. El-Habbaa and M.H.A. El-Gaffar, 2003. Virus like-RNA associated with mango malformation in Egypt. 2- Physiological and histological changes in malformed leaves and control. J. Phytopathol. Soc., 4: 23-40.
  69. El-Dougdoug, K.A., G.M. El-Habbaa and M.H.A. El-Gaffar, 2003. Virus like-RNA associated with mango malformation in Egypt. 1- Isolation and detection of the causal agents. J. Phytopathol. Soc., 4: 1-22.
  70. El-Dougdoug, K.A. and M.M. Hazaa, 2003. Trichodorid-Nematuda vector of tomato yellow leaf curl geminivirus (TYLCV). Egypt. J. Biotechnol., 13: 354-363.
    CrossRef  |  Direct Link  |  
  71. Younis, S.M., R.M. Taha and K.A. El-Dogdoug, 2001. Cytopathological studies and mode of transmission of beet curl top virus. Egypt. J. Microbiol., 52: 178-188.
  72. El-Dougdoug, K.A., S.M. Younis and R.M. Taha, 2001. Serological detected of antiviral substance induced by Tobacco mosaic and cucumber mosaic viruses infection. J. Union Arab Biol. Cairo, 10: 17-32.
  73. El-Dougdoug, K.A., R.M. Taha and A.M. Kheder, 2001. Application of some natural substances to control yellow leaf curl disease in tomato plants. Egypt J. Biotechnol., 9: 80-93.
  74. El-Din, M.A.T, K.A. El-Dougdoug and R.M. Taha, 2001. Pathogenesis – related protein as an index for deletion of potato plant pathogens. Egypt. J. Biotechnol., 9: 65-66.
  75. Sherif, E.A. and K.A. El-Dougdoug, 2000. Soluble protein and oxidatuie enzyme as index for detection of virus seed-borne in faba bean seeds. Annals Agric. Sci. Moshtohor, 38: 229-243.
  76. El-Dougdoug, K.A., R.M. Taha and A.A. Mouse, 1999. Studies on some faba bean seed-borne viruses. Arab. Univ. I. Agric. Sci. Ain Shams Univ. Cairo. Egypt., 7: 381-390.
  77. El-Yazed, A.A., K.A. El-Dougdoug and S.E. Ambaby, 1998. Isolation and Identification of pathogens related seed – borne in squash cucumber and tomato plants under protected agriculture. Annal. agric. Sci. Moshtohor Cairo Egypt., 35: 1293-1313.
  78. El-Ghaffar, M.H.A., K.A. El-Dougdoug and A.S. Sadik, 1998. Serological and molecular partial characterization on the Egyptian isolate of Zucchinin yellow mosaic potyvirus. Arab. Univ. Agric. Sci., Ain Shams Univ. Cairo Egypt, 6: 1-15.
  79. El-Dougdoug, K.A., M.H.A. El-Ghaffar and A.A. Shalaby, 1998. Viroid like RNA associated with tomato erect growth disease. Annal. Agric. Sci., Ain Shams Univ. Cairo. Egypt., 43: 1-19.
    Direct Link  |  
  80. El-Dougdoug, K.A., 1998. Occurrence of Peach latent masaic viriod (PLMVd) in apple fruit (Mallus alomestica). Annal. Agric. Sci. Ain Shams Univ. Cairo. Egypt., 43: 21-30.
  81. El-Dougdoug, K.A., Maisa, A. Awad, A.A. Shalaby and A.A.A. Zeid, 1997. Viroid affecting mandarin and navel orange in Egypt. Arab. Univ. Annals. Agric. Sci. Ain Shams Univ. Cairo Egypt, 5: 202-225.
  82. El-Afifi, S.I. and K.A. El-Dougdoug, 1997. Identification of some mechanically transmitted viruses affecting faba bean plants in Egypt. Annal. Agric. Sci. Ain Shams Univ. Cairo. Egypt., 42: 25-49.
  83. Othman, B.A., K.A. El-Dougdoug, A.S. Sadik and M.H.A. El-Ghaffar, 1996. Detection of banana bunchy top virus in some banana plantation in El-Qualubiya governorate. Annal Agric. Sci. Ain Shams Univ. Cairo. Egypt. 41: 627-634.
  84. El-Dougdoug, K.A., B.A. Othman and M.H.A. El-Gaffar, 1996. Some physiochemical properties of Egyptian isolate tomato yellow leaf curl virus. Annals Agric. Sci. Ain Shams Univ. Cairo. Egypt., 41: 645-661.
  85. El-Dougdoug, K.A., 1996. Detection of virus and viriod diseases in the sap of infected potato leaves using gel electrophoresis. Annal. Agric. Sci. Ain Shams Univ. Cairo. Egypt. 41: 120-132.
  86. El-Ahdal, A.M.E., K.H. El-Dougdoug and R. Taha, 1996. Effect of decreasing the amount of antigen on production of some plant viruses antisera. Annals agric. Sci., Ain Shams Univ., Cairo. Egypt. 41: 207-214.
  87. Aref, N.M., and K.A. El-Dougdoug, 1996. Biological and molecular diognosis of three different symptoms of TYLC- disease in open field. Annal. Agric. Sci. Ain Shams Univ. Cairo. Egypt. 41: 175-185.
  88. Aref, N.M. and K.A. El-Dougdoug, 1996. Effect of irrigation with waste water on some tomato viral diseases. Annals Agric. Sci. Ain Shams Univ. Cairo, 41: 155-172.
  89. Kassab, A.S. and K.A. El-Dougdoug, 1994. Interaction of root- knot nematoda Meloidogyne incognita and Broad bean necrosis virus (BBNV) in faba bean plants. Annal. Agric. Sci. Ain Shams Univ. Cairo, 93: 451-458.
  90. El–Dougdoug, K.A., D.A. Salama and N.A. Attia, 1993. Detection of stubborn diseae in some orange cultivars by diense stain and SDS-PADE. Annals Agric. Sci. Ain Shams Univ. Cairo, 38: 87-99.
  91. El-Dougdoug, K.A., S.H. El-Deeb and A.A. Abou-Zeid, 1993. Anatomical and ultrasructural changes in orange leaves infected with citrus exocortis viroid (CEVd). Annals Agric. Sci. Ain Shams Univ. Cairo, 38: 101-117.
  92. El–Dougdoug, K.A., 1992. Biological and chemical differentiation between potato spindle tuber and citrus exocortis viroids isolated in Egypt. Annal Agric. Sci. Ain Shams Univ. Cairo, 37: 401-410.
  93. Othman, B.A., K.A. El-Dougdoug and M.A. El-Nasr, 1991. Effect of garlic bubbilies extraction on tomato mosaic virus. Annal Agric. Sci. Ain Shams Univ. Cairo, 36: 441-450.
  94. El-Dougdoug, K.A. and B.A. Othman, 1991. Broad bean necrosis virus and its effect on mycorrhizal activity. Annals Agric. Se. Ain Shams Univ. Cairo, 36: 91-98.
  95. Allam, K., B.A. Othman, K.A. El-Dougdoug and M.I. Salama, 1991. Characterization of some virulent phages of azotobacter chroococcum. Annal. Agric. Sci. Ain Shams Univ. Cairo, 36: 423-453.