School of Agriculture,Enviroment,Water and Natural Resources

Education Background & Awards:

  • 2009 – 2013: PhD in Plant Sciences from the Institute of Agricultural Sciences (IAS), ETH-Zürich, Switzerland.
  • 2006 – 2009: Master of Science in Crop Protection from the University of Nairobi, Kenya
  • 2001 – 2005: Bachelor of Science in Agriculture from the University of Nairobi
  • 1996 – 1999: Certificate in Secondary Education (KCSE), Kabarnet High School, Kabarnet, Kenya.
  • 1988 – 1995: Certificate in Primary Education (KCPE), Ngetmoi Primary School, Kabarnet, Kenya.


  • 2017: ABCF fellowship Award from BeCA-ILRI Hub for a six-month funding for research in management of plant viruses (major cassava viruses).
  • 2009: North-South / ETH-Global, RFPP Scholarship Award, Zurich, Switzerland – three and half year funding to pursue doctoral studies in crop sciences (Cassava Tolerance to Drought)
  • 2008: BeCA & IITA Graduate / MSc- Fellowship Award – one year funding for MSc. Project.
  • 2006: Nairobi University MSc. Scholarship Award – pursue MSc. studies in Crop Protection

Publications & Projects

  1. Maluki, M., Orek, C.O and Akuja, T., 2019: Evaluation and selection of different legumes species based on morphological and nodulation differences under water deficient conditions of lower eastern Kenya. International Journal of Current Research, 11, (04), 3206-3214.
  2. C.O Orek, 2018: An Optimized Cetyltrimethylammonium Bromide (CTAB)-Based Protocol for Extracting RNA from Young and Old Cassava Leaves. Journal of Advances in Biology & Biotechnology, 19(4), pp. 1-7
  3. I.N. Koima and C.O. Orek, 2018: Response to Cassava Brown Streak Disease Infections in Local and Improved Cassava Genotypes under Field and Greenhouse Assays in Lower Eastern Kenya. International Journal of Pathogen Research 1(3), pp. 1-14
  4. I.N. Koima, C. Orek and S. Nguluu., 2018: Distribution of Cassava Mosaic and Cassava Brown Streak Diseases in Agro-Ecological Zones of Lower Eastern Kenya. International Journal of Innovative Science and Research Technology, Vol. 3 (1), pp. 391 – 399
  5. Koros, J.C, Runo, S.M., Yusuf, M., and Orek C.O., 2018: Screening selected cassava cultivars for resistance against cassava viruses and cassava green mites under advanced yield trials in Kenya. Journal of Biotechnology and Biochemistry, 4(5), pp. 37-52.
  6. Ngugi, K., Orek, C.O, and Mwang'ombe, A, 2013: Morphological and Physiological Measurement of the Stay-Green Trait in Transgenic and Non-Transgenic Cassava under Greenhouse Water Stress Conditions. Journal of Renewable Agriculture, Vol. 1 (5), 77 – 83.
  7. Orek, C., Zhang, P., Gruissem, W., Ferguson, M., and Vanderschuren, H., 2008: The Gene Expression Analysis of Staygreen Trait Associated with Drought Tolerance in Cassava.


  1. Excellent in English at writing, reading and speaking.
  2. Good in Swahili at writing, reading and speaking.
  3. Excellent in Luo (mother tongue) at writing, reading and speaking.

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