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Dr. Ephraim Onoku Osai

Associate Professor
Crop Science
osaieo@unical.edu.ng

Ephraim OnokuOsaiholds a B.Sc (Hon) Degree in Botany from University Calabar, M.Sc in Agricultural Biology and Ph.D with specialisation in Plant Pathology from University of Ibadan. He has taught and supervise undergraduate and postgraduate student including three Masters and three Doctorate students. His research interest covers Ecology, Etiology, Development and Management Fungi Diseases in major food and cash crops and has made breakthroughs in the use of ashes from agricultural wastes in plant disease management. He has also recorded success with the field application of plant extract in disease control. A recipient of University of Calabar senate grant and Tertiary Education Trust Fund (TETFUND) Institutional research and conference grant, this current research are; on post-harvest diseases of tropical fruits, nutritional changes coursed of pathogens and their control true eco-friendly alternatives; and constraints to economic production of plantain in Cross River State. Dr. Osai belong to several professional bodies including Nigerian Society for plant protection Bio-pesticides society of Nigeria, Mycological society of Nigeria and organic agriculture project in lechery institutions in Nigeria. He has participated in local and international conferences and was a member of the local organizing committee for the 12th annual conference of the Mycological Society of Nigeria (Calabar 2012) and the 1st and 2nd annual conferences of Bio Pesticides Society of Nigeria (Calabar 2014-2015). Dr. E.O. Osai was the founding secretary to the Editorial Board of the Faculty of Agriculture based Journal of Agriculture, Forestry and Environment and a Reviewer with Global Journal of Science, Global Journal of Agriculture, Bios’ Pesticides Journals, Journal of Agriculture food and Environment etc. He has served as External Examiner (LSc) to the University of Uyo and a two time head of department of Crop Science, University of Calabar, Calabar. He has been a Sub-Dean of the faculty of Agriculture, Chairman of Departmental and Faculty Graduate committees as well as Chairman of Departmental Quality Assurance and Examination Ethics among other position.

EFFA E. B., NWAGWU F. A., OSAI E. O., & SHIYAM J. O. (2016) Growth and yield response of Bambara groundnut (Vigna subterranean (L.) Verdc) to varying densities and Phosphate fertilizer rates in Calabar, South Eastern Nigeria. Journal of Biology, Agriculture and Healthcare (JBAH). 6(16):14-20.


ITTAH, M. A., G. A. IWO, E. O. OSAI & AKI, E. E(2011) Response of soybean Genotypes to soybean Rust (Phakopsora pachyrhizi (Sydow-) infection in Nigeria. Journal of Agriculture, Britichnology and Ecology. 4(3):54-69.


IWO G. A., ITTAH M. A. & OSAI, E. O. (2012) Sources and Genetics of Resistance to soybean Rust Phakopsora pachyrhizi (H. Synder) in Nigeria. Journal of Agricultural Science 4(10):1 - 6.


MADUNAGU, B.E., S.E.UDO, E.J.UMANA, A. A. MARKSON, E.O.OSAI & I.BASSEY (2008). Impact of rainfall on Colletotrichum leaf spot Infection of cucurbits in Cross River State, Nigeria. Journal of Agriculture, Forestry and the Social Sciences.6 (2):116-124.


NWAGWU F. A., EFFA E. B., & OSAI E. O. (2015) Weed flora dynamics and maize yield under different fertilizer types and spacing regimes. International Journal of Development and Sustainability (ISDS). 4(12):1116-1125.


OKWECHE S.I., OSAI E. O., & UMOETOK S. B. A. (2015) Maize borer damage in Nigeria’s Guinea Savanna: Timing of planting overrides effects of insecticides treatment. Revista Colombiana de Entomologia.. 41(2):170-175.


OKWECHE, S. I., UMOETOK, S. B. A. & OSAI, E. O. (2013) Effect of Synthetic (Carbofuran) and non-synthetic insecticides on Maize Growth and Yield in stem Borers infected zones of Cross River State, Nigeria. Journal of Biology, Agriculture and Healthcare. 3 (1):58 – 67


OSAI E. O., UDO S.E., OKOLI C. E., & BEMOH B. E. (2017) Comparative efficacy of three plant extracts for the control of leaf spot disease in fluted pumpkin (Telfairia occidentalis Hook F.). Journal of Biology, Agriculture and Healthcare (JBAH). 7(12):56-62.


OSAI, E. O. & T. IKOTUN (1996) Fungitoxic effect of Plantain ashes on Yam minisett and Cassava ministem rot Trop Agric (TRINIDAD) 73 (3): 245-248


OSAI, E. O. & T. IKOTUN (2000) Effect of Apron Plus on the growth of fungal Pathogens and rot suppress in Yam minisetts Global Journal of Pure and Applied Science.6(2):203-206.


OSAI, E. O. (2009). Comparative efficiency of plant ashes for the control of Sclerotium rot in Yam minisetts. African Journal of Environmental Pollution and Health 7(2):42 - 46.


OSAI, E. O., AKAN S. O. UDO, S.E. (2017) Fungi-toxic Effect of Kola husk and Plantain Fruit stalk on the Growth of Three Leaf Spot Pathogens of Telfairia occidentalis (Hook F) in vitro. Journal of Bio-pesticides and Environment.4(2):1-8.


OSAI, E. O., AKAN S.O, UDO S.E. (2016) Kola pod husk ash suppresses the development of leaf spot disease in fluted pumpkin (Telfairia occidentalis Hook F). Journal of Bio pesticides and Agriculture Nigeria 3(1):66-73.


OSAI, E. O., AKAN, S. O. & UDO S. E. (2013). The Efficiency of Plantain Inflorescence Ash in the Control of Translucent Leaf spot Disease of Telfairia occidentalis (Hook F). International Journal of Research in Applied, Natural and Social Sciences (IJRANSS) 1(1):37 - 44.


OSAI, E.O. & T. IKOTUN (1993) Micro-organisms associated with cassava ministem rot. Int. J. Tropical Plant Disease 11:161-166.


OSAI, E.O. & T. IKOTUN (1994, Microbial rot of yam minisett Fitopatol Brasieleria 19 :(3) 408-412.


UDO I. A., OSAI E. O & UKEH D. A. (2014) Management of Root-Knot Disease on Tomatoes with Bioformulated  Paecilimylsis lilacinus and Leaf Extract of Lantana camara. Brazilian Archieves of Biology and Technology 57 (4): 488 – 492.


UDOH, S. E., OSAI, E. O., OKOI, A. I., OROK, E. E., TAKON, I ANDETTA, H. E. (2010) Control of Choanephora cucurbitarium induced fungal rot in cucumber (Cucumis sativus) using plant extracts. Nigeria Journal of Mycology 3(1):126 - 134.


UDO, S. E., OSAI, E. O, UMANA E. J, MARKON A. A & MADUNAGU B C. (2013). Infection related changes in Nutritional contents of fluted pumpkin (Telfairia occidentalis) infected by Diplocassum spicatum and control using plant extracts. International Journal of Research in Applied, Natural and Social Sciences (IJRANSS) 1(1):29 - 36.


UDO, S. E. , E. O. OSAI, I. ANDY, E. E. OROK, T. TAKON & T. OMARA-ACHONG (2009). Histopathological studies on Telfairia occidentalis leaf infected by Colletotrichum lindemuthianum. Journal of Agriculture, Forestry and the Social Sciences 7(1):191-198.


UDO, S. E, OSAI, E. O., OKOI A. I, & ETTA, H. (2013) Assessment of yield loss in fluted pumpkin infected by Colletotrichum, lindemuthianum. International Journal of Applied and Natural Sciences (IJANS) 2 (5):77 - 84.


E. O. OSAI, T. IKOTUN, R. ASIEDU & S.K.HAHN (1996) Susceptibility of Yam Cultivars to minisett rot pathogens. Trop.Sc. 36:201-205.

No Results for Research Works done

Showing All Conferences Attended

Fourth International Conference on Plant Protection in the Tropics
Fourth International Conference on Plant Protection in the Tropics: Kuala Lumpur, Malaysia Paper presented: OSAI, E. O. and IKOTUN, T. Effects of inoculating yam minisetts with Pseudomonas fluorescens on rot incidence and sprouting in yam.
Start: Monday 28th March, 1994
End: Thursday 31st March, 1994
41st Annual Conference of Nigerian Society for Plant Protection (NNSPP)
41st Annual Conference of Nigerian Society for Plant Protection (NNSPP) Zaria. 20th-24th March, 2016. Paper presented: (i) OSAI E. O., HENSHAW, B. S., UDOH, S. E. and ETIM, V. E. Ethno-medicinal plant oil and water extracts as alternatives for the control of phytopathogenic fungi.
Start: Sunday 20th March, 2016
End: Thursday 24th March, 2016
12th National Conference on Organic Agriculture in Nigeria (OAPTIN)
12th National Conference on Organic Agriculture in Nigeria (OAPTIN) Kebbi. Paper presented: (i) OSAI, E. O., UDO, S. E. and BEMOH, B. E. Comparative Efficacy of Three plant Extracts for the Control of Leaf Spot Disease in Fluted Pumpkin. (Telfairia occidentalis Hook F).
Start: Sunday 13th November, 2016
End: Thursday 17th November, 2016
3rd Annual Conference of Bio pesticides Society of Nigeria (BpSN)
3rd Annual Conference of Bio pesticides Society of Nigeria (BpSN). CRUTECH Calabar, Paper presented: (i) OSAI, E. O., AKAN, S. O. and UDO, S. E. Fungi-toxic Effect of Kola and Plantain Ash on the in vitro Growth of Three Leaf Spot Pathogens of Telfairia occidentalis (Hook F).
Start: Monday 5th December, 2016
End: Thursday 8th December, 2016
First Annual Conference of Bio pesticides Society of Nigeria (BpSN)
First Annual Conference of Bio pesticides Society of Nigeria (BpSN). Calabar. Papers presented: (i) OSAI, E. O., UDOH, S. E. and HENSHAW, B. S. Antimycotic Activity of Aqueous and Oil Extracts of some Medicinal Plants against Sclerotium rolfsii (sacc) Curzi. in vitro. (ii) OSAI, E. O. ARIKPO, E. E. and UDO, S. E. Application of Medicinal plant Extracts for the control of Cocoyam leaf blight.
Start: Sunday 30th November, 2014
End: Monday 1st December, 2014
Fifth Annual Conference of the Mycological Society of Nigeria
Fifth Annual Conference of the Mycological Society of Nigeria. Calabar Papers presented: (i) OSAI, E. O. Fungi Discolouration of Cowpea seeds in Calabar, South Eastern Nigeria. (ii) OSAI, E. O., OKEKE, V. N. and EKWERE, M. P. Effects of Plant-Waste Ashes on the in vitro Growth of Cowpea Seed-borne Pathogens.
Start: Sunday 23rd September, 2012
End: Thursday 27th September, 2012
No Results for Grants/Awards Received