Gehan Ibrahim Khalil Marei, Ph.D., Associate Professor

Department of Plant Protection

Pesticide Chemistry and Toxicology Laboratory, Damanhour University, Faculty of Agriculture, Egypt.

Phone: +2-01064548746; fax: +2-045-3316535;






Name ofInstitution

Field of Study


Faculty of Agriculture, Alexandria University-branch Damanhour, Egypt.

Pesticide chemistry and Toxicity



Faculty of Agriculture, Alexandria University-branch Damanhour, Egypt.

Pesticide Chemistry and Toxicology



Faculty of Agriculture, Alexandria University-branch Damanhour, Egypt.

Pesticide Chemistry and Toxicology






Appointment: Research and Teaching


Short Biographical

The research interests in my laboratory focus on isolation and identification of natural products from plants and algae. Currently, my lab is working on using natural product, which isolate from plants against pathogens and test the antifungal agents from natural sources, which prevent the contamination of food by controlling the growth of Aspergillus flavusAspergillus flavus plays a role as contamination in food. It is especially a flatoxins. In addition, we are interested in determine the effect of sub-acute fungicides exposure in the liver, kidney and testes male rats and reducing the harmful effect of fungicides by using natural product as plant extracts which has antioxidant effect.



Research Interests

·      Investigate the antibacterial and antifungal potentials from extracts of plants and algae.

·      Understanding the structure and biosynthesis of plant natural products by various chromatographic separation devices GC-Ms and HPLC and GC.

·      Investigate harmful effects of pesticides on non-target insects (beneficial insects).

·      Investigate Natural plant products and extracts as antioxidants to reduce the impact of pesticides.



·         Physical and Inorganic Chemistry.

·         General Organic Chemistry.

·         Analytical Chemistry.

·         Chemistry of Aromatic Compounds.

·         Pesticide Analysis.

·         Safe Control of Protected Cultivation.

·         Fungicides.




1.         Marei G.I.Kh., Abdelgalei S.A.M., 2018. Antifungal potential and biochemical effects of monoterpenes and phenylpropenes on plant pathogenic fungi. Plant Protect. Sci., 54: 9–16.


2.         Marei G. I. Kh, Rabea, E.I, Badawy M.E.I., 2017. Ultrasonic Emulsification and Characterizations of Bio-based Nanoemulsion Formulations Containing Citral with Their Antimicrobial Activity. Egypt. Acad. J. Biolog. Sci., 9(3): 169-182.


3.         Abdel Rasoul M., Marei, G.I.Kh., 2016. Potential therapeutic effect of turmeric (Curcuma longa) against adverse effects of penconazole fungicide to white rats. International Journal of Pharmacology and Toxicology. 4(2): 178-186.


4.         Abbassy, A.M., Marei, G., Rabia, S.M., 2014. Antimicrobial Activity of Some Plant and Algal Extracts. International Journal of Plant & Soil Science.  3 (10): 1366-1373.


5.      Algamal, M., Marei, G., Saad, M., Samir, A.M., Abdelgaleil, S., 2013. Antimicrobial and Phytotoxic Properties of Artemisinin and Related Derivatives. World Applied Sciences Journal 28 (10): 1382-1388.


6.      Heikal, M.T., Mossa, H.A., Abdel Rasoul, M.A. Marei, G., 2013. The Ameliorating Effects of Green Tea Extract against 4 Cyromazine and Chlorpyifos Induced Liver Toxicity in Male Rats. Asian Journal of Pharmaceutical and Clinical Research. 6(1): 48-55.


7.      Abbassy, M.A., Marei, G., 2013. Antifungal and chemical composition of Essential oils of Juniperus communis L. and Thymus vulgaris L. against two phytopathogenic fungi. Journal of Applied Sciences Research, 9(8): 4584-4588.


8.      Marei G., 2013.Effect of four monoterpenes and an alkaloid capsaicin on growth of  Aspergillus flavus and aflatoxin production. Egyptian journal of plant protection research, 1(3): 1-14.


9.      Marei, G.,Eid, S.A., Abdel Rasoul M., 2013. Toxic and Biochemical Effects of Beauveria bassiana and Spinosad on Nurse and Field Workers of Honey Bee, Apis mellifera. Journal of plantProtection and Pathology, Mansoura University. 4(4):397-420.


10.  Abdel-Rasoul M.A.; Eid, S.A., Marei, G., 2013. Impacts of Multiple Applications with Biofly (Beauveria bassiana) and Spintor® (Spinosad) on Honey Bee (Apis mellifera) Larvae.  Journal of plantProtection and Pathology, Mansoura University, 4(1):49-66.


11.  Heikal, M.T., Mossa, H.A., Marei, G., Abdel Rasoul, M.A., 2012. Cyromazine and Chlorpyrifos Induced Renal Toxicity in Rats: The Ameliorating Effects of Green Tea Extract. Journal of Environmental & Analytical Toxicology. 2(6):149-155.


12.  Abdel Rasoul M., Marei, G., Abdelgaleil, S., 2012. Evaluation of antibacterial properties and biochemical effects of monoterpenes on plant pathogenic bacteria. African Journal of Microbiology Research. 6(15): 3667-3672.


13.  Marei, G.,Abdel Rasoul M., Abdelgaleil, S., 2012. Comparative antifungal activities and biochemical effects of monoterpenes on plant pathogenic fungi. Pesticide Biochemistry and Physiology. 103: 56–61.


14.      Abbassy, M.A., Kadous, E.A., Abd-Allah, M., Marei, G., 2012. Isolation and identification of    cardenolide compounds of Gomphocarpus sinaicus and their fungicidal activity against Soil borne and Post harvest fungi. Journal of life science. 6(9): 985-994.


15.  Eid, S.A., Marei, G., Abdel Rasoul M., 2011. Acute toxicity of some biopesticides and their effect on acetylcholinesterase of honey bee (Apis mellifera) workers. Journal of plantProtection and Pathology, Mansoura University. 2(10):805-827.










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