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Name

Dr. Etim Johnson Umana

Department

Botany

Designation

Associate Professor

Email

[email protected]


About Dr. Etim Johnson Umana

I am a Phytopathologist/Mycologist, currently involved in using botanicals in the control of plant diseases; also investigating the effects of mycotoxins in human beings and animals and how to control and reduce the effects in food and feed stuffs. I am a member of many learned academic Societies which include Nigerian Society for Plant Protection (NSPP), Botanical Society of Nigeria (BOSON), Chemical Society of Nigeria(CNS), Biopesticides Society of Nigeria (BpSN), Nigerian Association of Petroleum Explorationist, Mycological Society of Nigeria. I have held many post of responsibilities, Sub-Dean, Faculty of Science, Remedial/Pre-degree Coordinator, Head, Department of Botany, University of Calabar, Pioneer Head, Department of Biological Sciences, Akwa Ibom State University, Secretary, Academic Brief committee, Akwa Ibom State University, Visiting Lecturer, Akwa Ibom State University, Chairman, Central time table committee, Akwa Ibom State University, Mkpat Enin, Akwa Ibom State.PROFILE OF ASSOCIATE PROFESSOR ETIM JOHNSON UMANA (PHYTOPATHOLOGIST/MYCOLOGIST)DEPARTMENT OF PLANT & ECOLOGICAL STUDIESFACULTY OF BIOLOGICAL SCIENCESUNIVERSITY OF CALABAR, CALABAR1. EMPLOYMENT HISTORYDate of First Appointment: 19th February, 1992Date of Assumption of Duty in University of Calabar: March 4, 1992.Date of Last Promotion / Upgrading: 1ST October, 2014.Position Institution DutiesAssociate Professor 2014 till date Department of Botany,University of Calabar, Calabar Head of Department, teaching, research, conducting practical classes and supervision of B. Sc, M.Sc. and Ph.D research projects and thesis.Senior Lecturer (2008) Department of Botany, University of Calabar, Calabar Department of Biological Sciences, Akwa Ibom State University, Ikot Akpaden (2010-2012 )- Sabbatical Teaching, research, conducting practical classes and supervision of B. Sc, M.Sc and Ph.D research projects and thesis. General administration as Sub-dean of Science and coordination of Pre-degree programme.Lecturer I (2005) Department of Botany, University of Calabar, Calabar Teaching, research, conducting practical classes, supervision of B. Sc, M. Sc and Ph.D research projects and theses. General administration as Sub-dean of Science and coordination of Pre-degree programme. Lecturer II (1997) Department of Botany, University of Calabar, Calabar Teaching, research, conducting practical classes, Supervision of B. Sc research projects Assistant lecturer (1992 ) Department of Biological Sciences, University of Calabar, Calabar.Teaching, research, conducting practical and supervision of B.Sc research projectsResponsibilities with Dates1. Head of Department of Botany University of Calabar, Calabar           2014 - 20162. Sub-Dean - Faculty of Science            2005-20093. Coordinator - Remedial /Predegree Programme 2006-20093. Member- Central Time Table Committee, University of Calabar 2005-20095. Time Table Officer- Department of Biological Sciences             1993-19976. Time Table Officer- Department of Botany 1997-20147. Chairman- Calabar University Students Electoral Commission (CUECO) 2009/20108. Vice Chairman- Faculty of Science Committee- International Journal of Natural and Applied Sciences - 2005 - 20099. Examination Officer Department of Botany 1993-199810. Project Coordinator-Department of Botany     1993-2010, 2013 - 201511. Seminar Coordinator 1993-200412. Academic Adviser- Department of Botany, University of Calabar 1994-200413. Staff Adviser: Faculty of Science Students Association, University of Calabar 2005-200914. Field Trip Coordinator: Department of Botany, University of Calabar 1996-2004.15. Visiting Lecturer: Akwa Ibom State University, Ikot Akpaden, Akwa Ibom State-(Sabbatical).                                                                         2010-201216. Member: Akwa Ibom state University Senate. 2010-201217. Visiting Lecturer (Adjunct): Akwa Ibom State University, Ikot Akpaden 2012-2015 18. Pioneer Head: Department of Biological Sciences, Akwa Ibom State University, Ikot Akpaden                                             2010-201219. Chairman: Central Time Table Committee, Akwa Ibom State University, Ikot Akpaden                                                            2010-201220. Vice Chairman : Local Organizing Committee 5th Annual Conference of Mycological Society of Nigeria 201221. Member: Contact Committee Biopesticides Society of Nigeria. - 201422. Acting Head: Department Of Botany, University of Calabar. - 2014- 201623. Member: University of Calabar Senate.  - 2014- 201624. Member: Central Admission Committee.  2005-2009, 2014- Present Date25. Member: Faculty of Science Appraisal and Promotion Committee 2005-2009, 2014-Present Date26. Member: Department of Botany Appraisal and Promotion Committee. 2008- Present DateCommunity Service1. Member: Field Trip for Survey of Medicinal Plants and Traditional Medicine Practices of the Benue Area of Nigeria. January 26-29, 2003.2. Secretary-Committee: For the Development of Academic Brief for the Establishment Akwa Ibom State University -2008-2010.3. Returning Officer: Presidential Election 2011- Bekwarra Local Government Area, Cross River State, Nigeria.4. Returning Officer: Senatorial and House of Representative Election 2011 -Obudu Local Government Area, Cross River State, Nigeria.5. Returning Officer State House of Assembly Election 2011 -Bekwarra Local Government Area, Cross River State, Nigeria.2. EDUCATIONIkono Ibom Comprehensive Secondary School, Uyo (WASC) 1975-1980University of Calabar, Calabar (B.SC) 1983-1987University of Ibadan, Ibadan (M.Sc) 1990-1991University of Calabar, Calabar (Ph.D ) 1998-20053. GRANTS/FELLOWSHIPS1. University of Calabar Research Grant 2000 (Comparative evaluation of chemical methods for the control of fungal pathogen of Gmelina arborea Roxb in Cross River State, Nigeria.2. University of Calabar TETFUND RESEARCH GRANT 2016 (The control of wet rot disease of Amaranthus and Okra in Calabar, Cross River State, Nigeria using some botanicals).4. AWARDS/HONORS1. Cross River State Scholarship (Secondary School). - 1976- 19802. Federal Government Scholarship (M.Sc.). - 1990/913. Award of Excellence National Association of Botany Students, University of Calabar. - 2013/20144. Award of Honour in Recognition of Achievement as the Head of Department National Association of Botany Students, University of Calabar. 2014/20155. Award of Honour     National Association of Botany Students, University of Calabar. 2011/20126. Award of Excellence as Best Head of Department (Botany)    National Association of Science Students.       2015/20167. Award of Recognition for your Contribution to the Student's Union Government    Student Union Government, University of Calabar.       2009/20108. Distinguish Service Award in Recognition of Outstanding Service and Contribution to the Development of our community,    Rotaract Club Cannan City (CB) Calabar.  2009/20109. Meritorious Service Award Department of Genetics and Biotechnology Student Association, University of Calabar. 10. Microbiology Merit Award 2005" as Sub-Dean of Faculty of Science,University of Calabar. 2004/200511. Award of Honour by National Association of Science Students as     Sub-Dean/Staff Adviser,    Faculty of Science University of Calabar, Calabar -    2008/200912. Honorary Award by Biological Science Students University of Calabar as    Sub-Dean/Staff Adviser, Faculty of Science University of Calabar. - 200813. Merit Award for Meritorious and Selfless Service to the building of an Elegant Student Unionism. Genetics and Biotechnology Students Association,     University of Calabar.GRADUATE STUDENT/POST-DOC/RESEARCH SCIENTIST MENTORING/ SUPERVISIONI have supervised Three MSc and two PhD Students and currently supervising two Msc and four PhD students.CONFERENCE ORGANISED: 1. mycological society of Nigerian conference - 2012                                               2. Biopeticide society of |Nigerian conference - 2015                                                        and 2016.PROFESSIONAL ASSOCIATIONS1. Member- Nigerian Society of Plant Protection (NSPP)2. Member-Botanical Society of Nigeria (BOSON)3. Member-Society of Agricultural Biologists (SAB)4. Member-Nigerian Environmental Society (NES)5. Member-Chemical Society of Nigeria (CSN)6. Member-Nigerian Association Petroleum Explorationists (NAPES)7. Member -Biopesticides Society of Nigeria (BpSN)8. Member, Mycological Society of Nigeria (MYCOSON)


S/N Qualification School Atttended Started Finished

S/N Publication
1. Markson, Aniedi-Abasi Akpan, Omosun, Garuba, Umana, Etim Johnson, Amadioha, Anderson Chidi and Udo, Samuel Effiong (2017) Potency of Plant-based Fungicides against a Rot Pathogen of White Yam (Dioscorea rotundata Poir) Journal of Advances in Microbiology, 5(3): 1-9.
Markson, A. A., Akwaji, P. I. and Umana, E. J. (2017). Mushroom Biodiversity of Cross River State National Park (Oban Hills Division), Nigeria, World Scientific News, 65:59 - 80.
Markson, A. A.; Umana, E. J.; Udo, S. E. and Akwaji, P. I. (2016). Chemical Pesticides: are they really necessary? Nigerian Journal of Biopesticides, 1:(1) 109 - 143.
Umana, E. J.; Markson, A. A.; Udo, S. E.; Okon, E. I. and Akwaji, P. I. (2016). Control of Post Harvest Rot of Sweat Orange (Citrussinensis) with Extracts of Plant Origin. Nigerian Journal of Biopesticides 1(1) 88 - 93.
Udo, S. E.; Umana, E. J.; Markson, A. A. and Okey, E. N. (2016). Control of Maize and Bean Weevils in Storage with Commonly Consummed Spices. Journal of Biopesticides and Agriculture. 3(1) 25 - 29.
Umana, Etim Johnson, Akwaji, Patrick Ishoro, Ekpenyong, Emmanuel Michael and Hanson, Penninah Imeh (2016). Control of Green Rot Fungus of Arachis hypogaea L. in storage using plant extracts. International Letters of Natural Sciences, 58: 77-84.
Akwaji, Patrick Ishoro, Okon, Ekeng Ita, Umana, Etim Johnson and Markson, Aniedi-Abasi Akpan (2016). Phytochemical and Antifungal Efficacy of Leaf and Stem Bark Extracts of Parkiabiglobosa on Fungi Association with Seed Rot of Green Bean (Phaseolusvulgaries L.) in Akpabuyo, Cross River State, Nigeria, International Journal of Pharmacology, Phytochemistry and Ethnomedicine, 3:27 - 38.
Akwaji, P. I., Umana, E. J. and Okon, E. I. (2016). Phytochemical and Antifungal activity of Leaf extracts of Corchorusolitorius and Gongronemalatifolium on Fungi Associated with Post-Harvest Deterioration on Maize (Zeamays) Seeds in Oban Community, Nigeria. World Scientific News, 53(3):157 - 177.
Umana, Etim Johnson, Akwaji, Patrick Ishoro and Markson, Aniedi-Abasi Akpan (2016). Bioremediation of Spent Engine Oil Contaminated Soil by Using Fungus, Penicllium sp. International Letters of Natural Sciences, 59:82 - 91.
Okey, Edward Ntui, Akwaji, Patrick Ishoro, Akpan, Juliet Bassey, Umana, Etim Johnson and Bassey, Glory Akpan (2016). Invitro Control of Tomato (Solanumlycopersicum L.) fruit rot caused by fungi using two plant extracts. International Letters of Natural Sciences, 52:19 - 27.
Umana. E. J.; Akwaji, P. I.; Markson, A, A. and Udo, S. E. (2015). Phytochemical Constituents and In vitro Inhibitory Effect of ten Plant Extracts on Fungi associated with Gmelinaarborea Roxb in Cross River State Nigeria. Journal of Biopesticides and Environment. 1:63 - 73.
Edelduok, E. G. and Umana, E. J. (2015). Nematodes as biocontrol agents of insect pests of plant. Journal of Biopesticides and Environment 1:80 - 88.
Andy, I. E.; Edu, G. S.; Bassey, I. U.; Markson, A. A.; Umana, E. J. and Udo, S. E. (2015). Biodegradation of paraquat. Journal of Biopesticides and Environment. 1:74 79.
Markson, A. A.; Akpan, J. B.; Anwan, E. E.; Umana, E. J.; Udo, S. E. and Akwaji, P. I. (2015). InVitro Bioactivity of Aliunmsativum and Aliumcepa extracts against some wound pathogens in Calabar, Cross River State, Nigeria. Journal of Biopesticides and Agriculture. 1:93 - 98.
Udo, S. E., Akwaji, P. I., Markson, A. A., Umana, E. J., Okey, E. N. and Asuquo, M. (2015). Parkia biglobosa Jacq (dawa-dawa): The threatened giant of the Guinea savanna of Nigeria (The Cross River State situation). Global Journal of Science Frontier Research C 16 (2) ver. 1.0, 21-32
Umana, E. J.; Akwaji, P. I.; Markson, A. A. and Udo, S. E. (2015). Gmelinaarborea Roxb: Associated Mycoflora and Diseases in Cross River State, Nigeria. Global Journal of Science Frontier Research: C Biological Sciences 15(4 ver. 1.0) 1 -11.
E. J. Umana, S. E. Udo, A. A. Markson, E. N. Okey, N. A. Okon and E. M. Ekpenyong (2015). In-vitro effect of some commonly found botanicals on the growth and sporulation of Choanephora cucurbitarum (Berkeley and Ravenel). Journal of Biology, Agriculture and Healthcare, 5(11):111-119.
Edward Ntui Okey, Patrick Ishoro Akwaji, Etim Johnson Umana and Joy U. Omini (2015). Phytochemical screening and control of fungal diseases of Cocoa (Theobromae cacao L.) pod using extracts of plant origin. Agricultural and Bionutritional Research 1 (1): 20 - 27.
Okey, Edward Ntui; Akwaji, Patrick Ishoro; Umana, Etim Johnson and Markson, Aniedi-Abasi Akpan (2015). InVitro and InVivo Biological evaluation of crude extracts of Discoreadumetorum and Psidiumquajava leaves in the control of storage rot of Onion (Alliumcepa L.) bulbs. International Journal of Pharmacology, Phytochemistry and Ethnomadicine 1: 81 - 92.
Umana, E. J., Akwaji, P. I., Markson, A. A., Udo, S. E. and Orok, E. E. (2014). Phytochemical composition antimicrobial effect of Azadirchtaindica and Caricapapaya extracts on fungi isolated from Gmelinaarborea seedlings. International Journal of Phytopathology, 3(3), 109 – 115.
Markson, A. A., Omosun, G., Umana, E. J., Madunagu, B. E., Amadioha, A. C. and Udo, S. E. (2014). Differential response of Solanum L and Ipomeabatatas to three rot pathogens. International Research Journal of Natural Science, 2(1), 40 – 51.
Umana, E. J., Akwaji, P. I., Ekpenyong, E. M. and Okon, E. I. (2014). Suppression of Fusarium wilt of tomato by organic soil amendment. Journal of Life Sciences Research and Discovery 1, 5 – 9.
Umana, E. J., Akwaji, P. I., Ekpenyong, E. M., Okon, E. I. and Aruga, B. A. (2014). Effect of crude oil polluted soil in morphological growth of Phaseolusvulgaries (L). Journal of Life Sciences Research and Discovery 1, 14 – 18.
Umana, E. J., Akwaji, P. I., Udo, S. E., Markson, A. A., Okey, E. N. and Udo, I. J. (2014). Determination of pathogenicity of Choanephora cucurbitarum (Berkeley and Ravenel) Thaxt, amongst commonly cultivated vegetables in Calabar, Cross River State, Nigeria. International Journal of Phytopathology, 3(2):55 – 61.
Umana, E. J., Akwaji, P. A., Udo, S. E., Markson, A. A., Okey, E. N., Akpan, J. B. and Effiong, P. F. (2014). Mycoflora associated with cocoa (Theobromaecacao) pods obtained in the field and their effects on seed nutritional contents. Journal of Agriculture and Crop Research, 2(12), 236 -241.
Udo, S. E., Osai, E. O., Umana, E. J., Markson, A. A. and Madunagu, B. E. (2013). Infection related changes in nutritional content fluted pumpkin (Telfaria occidentalis) infected by Diplocossum spicatum and control using plant extracts. International Journal of Research in Applied and Natural Sciences (IJRANSS), 1 (1), 29 – 35.
Okey, E. N., E. J. Umana, A. A. Markson and P. A. Okey (2012). Municipal Solid Waste characterisatoion and management in Uyo, Akwa Ibom state Environment. In Sustainable development and Planning vi Ed: C. A. Brebbia. Wessex Institute of Technology, New Forest, UK.
Anwana, E. D., Umana, E. J. and Lennox, J. A. (2012) Antimircobial potential of ten medicinal plants used by the Bokis, Cross River State, Nigeria. Medicinal and AromaticPlants1:106 :doi 10 .4172/2167-0412. 1000106.
Markson, A. A., Amadioha, A. C., Omosun G., Madunagu, B. E., Udo, S. E. and Umana, E. J. (2012) . Control of Botryodiplodia theobromae causing tissues rot of white yam (Discoreae rotundata Poir). Scholarly Journal of Agricultural Science, 1 : 1-7.
Markson, A. A., Umana, E. J., Udo, S. E., Omosun, G., Madunagu, B. E. and Osim, M. O. (2012) Tissue maceration and starch depletion caused by some rot pathogens of cassava (Manihot esculenta Cranz) International Journal of Current Research4 (4) : 099-104 (ISSN : 0975-833X ).
Ebigwai, J. K., Edu, E. A., Umana, E. J. and Agaidaigho, A. (2012) In vivo evaluation of essential oil extract of six plants species and ivermectin on microfilaria of Simulium yahense. Journal of Natural Products and Plant Resources,2(2):306-309.
Udensi, O., E. J. Umana, E. A. B. Edu and E. V. Ikpeme (2011). Screening locally Pulses for proximate, anti-nutritive and mineral compositions. Indices for conservation and improvement. International Journal of Agricultural Research, 6(6):504-510.
Udensi, O., E.A.B. Edu, E. J. Umana and E. V. Ikpeme (2011). Estimation of genetic variability in locally grown pulses (Cajans cajan) (L.) Millsp : and Vigna unguiculata ( L.) Walp : A panacea for sourcing superior genotypes. Pakistan Journal of Biological Sciences. ISSN 1028-8880/DOI.3929/pjbs.2011:1-4.
Udensi, O., Ikpeme, E. V., Markson, A. A., Madunagu, B. E. and Umana, E. J. (2011). Phytochemical markers of water samples treated with Moringa oleifera seed suspension. Research Journal of Agriculture and Biological Sciences, 7(2): 322 – 327.
Ekaluo, U. B., Ikpeme, V. E., Udensi, O., Madunagu, B. E. Markson, A. A., Omosun, G. and Umana, E. J. (2011). Anti-fertility activity of aqueous leaf extract of neem (Azadirachta indica) in male albino rats. World Journal of Medical Pharmaceutical Biological Sciences, 1(1) :01-05.
Markson, A. A., Amadioha, A. C., Omosun, G., Ukeh, D., Udo, S. E., Umana, E. J. and Madunagu, B. E. (2011). Control efficiency of Botryodiplodia theobroma(PAT) by essential oil of Afromomum melengueta (K. Schum) seed from south south Nigeria. International Journal of Agricultural Research. ISSN: 2006 – 1730: 88 – 92.
Ekaluo, U. B., Ikpeme, V. E., Udensi, O. Markson, A.A., Madunagu, B. E.,Omosun, G. and Umana. E. J. (2010). Effect of aqueous leaf extract of Neem (Azadirachta indica) on the hormonal milieu of male rats International Journal of Current Research,4:001-003.
Udensi, O., Ikpeme, E. V., Markson, A. A., Edu, E. A. B., Umana, E. J. and Urua I. S. (2010) Selection of soybean genotypes using morphological markers. International Journal of Current Research, 7: 005-008.
Markson, A. A., Omosun, G., Madunagu, B. E., Amadioha, A. C., Udo, S. E., Umana, E. J. and Ekaluo, U. (2010). Growth response of Botryodiplodia theobromae to some environmental factors and its implication on yam storage. International Journal of Natural and Applied Science, 5 (1 & 2): 11 – 15.
Umana, E. J.,Udo, S. E., Markson, A. A., Madunagu, B. E. and Omokaro, D. N. (2009). Influence of age and pH on the activity of pectinase in Fusarium induced Gmelina seedling rot. Nigerian Journal of Mycology,2(1): 198-208.
Madunagu, B. E., Udo, S. E., Umana, E. J. , Markson A. A. and Bassey, I. (2007).Impact of rainfall on Colletotrichum leaf spot infection of cucurbits in Cross River State. Nigeria. Journalof, Agriculture Forestry and Social Sciences. 6(2) :116-124.
Madunagu, B. E., Udo, S. E., Umana, E. J. and Markson, A. A. (2007). Effect of Colletotichum leaf spot disease on growth parameters of Colocynthis citrillus and Cucurbita pepo. International Journal of Natural and Applied Sciences, 2(2):40-44.
Umana, E. J.; Madunagu, B. E., Udo, S. E. and Markson, A. A. (2007). Time course of production of pectolytic enzymes by pathotypes of Choanephora cucurbitarum. International Journal of Natural and Applied Sciences 2(1): 49-52.
Udo, S.E., Madunagu, B. E.,Umana, E. J. Markson, A. A. and Obi-Abang, M. (2007). Biochemical alteration on Colletotrichum lindemuthianum-infected pumpkin (Cucurbita pepo). Journal of Agriculture, Forestry and Social Sciences ( JAOFSS), 5(1): 120-125.
Udo, S.E, Madunagu B. E., Umana, E. J., Markson, A. A. and Takon, I. (2006).The efficacy of extracts from four oil seeds and oil fruit as agents against pathogenic microbes in comparison with known antibiotics. Journal of Agriculture, Forestry andSocialSciences (JAOFSS), 4(2):119-125.
Madunagu B. E., Udo, S.E, Umana, E. J., and Markson, A. A. (2005). Exploitation of Phanerogamic parasites and epiphytic plants for their medicinal value. Nigerian Journal of Plant Protection, 22: 17 – 23.
Markson, A. A., Madunagu, B. E., Umana, E. J. Udo, S. E. (2005). A Survey and biocontrol of the post- harvest fruit rotting fungi of tomato. Nigerian Journal of Plant Protection 22: 122-131.
Umana, E. J., and Ikotun, T. (2000) Effect of pH on enzyme productivity by three pathotypes of Choanephora cucurbitarum. Global Journal of Pure and Applied Sciences 6(3) :413 – 416.

warning No Result For Grants Received.


S/N Conference Description Started Finished
Umana, E. J., Ikotun, T., Madunagu, B. E. and Udo, S. E. (1998) Effect of pH on enzyme productivity by three pathotypes of Choanephoracucurbitarum Botanical Society of Nigeria (BOSON) 9th Annual Conference, University of Ilorin, Kwara State, Nigeria,Umana, E. J., Ikotun, T., Madunagu, B. E. and Udo, S. E. (1998) Effect of pH on enzyme productivity by three pathotypes of Choanephoracucurbitarum Botanical Society of Nigeria (BOSON) 9th Annual Conference, University of Ilorin, Kwara State, Nigeria, July 26thn-30th, 1998. 1998-07-261998-07-30
Umana, E. J., Madunagu, B. E., and Udo, S. E. (1999) Effect of extracts from Caricapapaya, Costusafar and Ocimumgratissimum on fungal pathogens of Gmelinaarborea Botanical Society of Nigeria.(BOSON),10th Annual Conference, Port Hacourt. Nigeria, JulyUmana, E. J., Madunagu, B. E., and Udo, S. E. (1999) Effect of extracts from Caricapapaya, Costusafar and Ocimumgratissimum on fungal pathogens of Gmelinaarborea Botanical Society of Nigeria.(BOSON),10th Annual Conference, Port Hacourt. Nigeria, July 25th – 29th, 1999.1999-07-251999-07-29
Madunagu, B. E., Udo, S. E. Umana, E. J. and Adung, E. A. (2003) Exploitation of phanerogamic parasites and epiphytic plants for their medicinal value. Chemical Society of Nigeria 26th Annual International conference Makurdi, Benue State, September, Madunagu, B. E., Udo, S. E. Umana, E. J. and Adung, E. A. (2003) Exploitation of phanerogamic parasites and epiphytic plants for their medicinal value. Chemical Society of Nigeria 26th Annual International conference Makurdi, Benue State, September, 22nd – 26th, 2003.2003-09-222003-09-26
Umana, E. J. Tunde Ikotun, Madunagu, B. E., Udo, S. E. and Ekaluo, U. B. (2003). Time course of production of pectolytic enzymes by pathotypes of Choanephoracucurbitarum. Chemical Society of Nigeria, 26th Annual International Conference, Makurdi, BenUmana, E. J. Tunde Ikotun, Madunagu, B. E., Udo, S. E. and Ekaluo, U. B. (2003). Time course of production of pectolytic enzymes by pathotypes of Choanephoracucurbitarum. Chemical Society of Nigeria, 26th Annual International Conference, Makurdi, Benue State, September, 22nd – 26th, 2003.2003-09-222003-09-26
Udo, S. E., Madunagu, B. E., UmanaE. J. and Ibebunjo C. (2003). The efficacy of extracts from four oil seeds and oil fruit as anti-microbial agents in comparison with known antibiotics. Chemical Society of Nigeria, 26th Annual International ConferenUdo, S. E., Madunagu, B. E., UmanaE. J. and Ibebunjo C. (2003). The efficacy of extracts from four oil seeds and oil fruit as anti-microbial agents in comparison with known antibiotics. Chemical Society of Nigeria, 26th Annual International Conferences, Makurdi, Benue State, September, 22nd – 26th, 2003.2003-09-222003-09-26
Udo, S. E., Madunagu, B. E., Umana, E. J. and Markson, A. A. (2004). Biological control of Fusarium wilt disease of Lycopersiconesculentum. Nigerian Society of Plant Protection, 31st Annual Conference, University of Agriculture, Makurdi , Benue StatUdo, S. E., Madunagu, B. E., Umana, E. J. and Markson, A. A. (2004). Biological control of Fusarium wilt disease of Lycopersiconesculentum. Nigerian Society of Plant Protection, 31st Annual Conference, University of Agriculture, Makurdi , Benue State. February, 22nd – 26th, 2004.2004-02-222004-02-26
Markson, A. A., Madunagu, B. E., Umana, E. J. and Udo, S. E. (2004) . Investigation on the bio-active efficacy of seed extracts of Aframomummelegueta and Piperguinenses against ChoanephoracucurbitarumInvitro. Nigeria Society for Plant Protection , 31Markson, A. A., Madunagu, B. E., Umana, E. J. and Udo, S. E. (2004) . Investigation on the bio-active efficacy of seed extracts of Aframomummelegueta and Piperguinenses against ChoanephoracucurbitarumInvitro. Nigeria Society for Plant Protection , 31st Annual Conference, University of Agriculture, Makurdi, Benue State, February, 22nd – 26th, 2004.2004-02-222004-02-26
Madunagu, B. E. Udo, S. E. and Umana, E. J. (2004 ) Occurrence and biological control of powdery mildew disease of cucurbits. Nigerian Society for Plant Protection, 31st Annual Conference University of Agriculture, Makurdi, Benue State, February, 22nMadunagu, B. E. Udo, S. E. and Umana, E. J. (2004 ) Occurrence and biological control of powdery mildew disease of cucurbits. Nigerian Society for Plant Protection, 31st Annual Conference University of Agriculture, Makurdi, Benue State, February, 22nd – 26th, 2004.2004-02-222004-02-26
Umana, E. J., Madunagu, B. E., Omokaro, B. N., Markson, A. A. and Udo, S. E. (2004). The effect of solvents on the potency of Azadirachtaindica and Caricapapaya in the control of some pathogenic fungi isolated from infected parts of Gmelinaarborea RUmana, E. J., Madunagu, B. E., Omokaro, B. N., Markson, A. A. and Udo, S. E. (2004). The effect of solvents on the potency of Azadirachtaindica and Caricapapaya in the control of some pathogenic fungi isolated from infected parts of Gmelinaarborea Roxb. Nigerian Society for Plant Protection 31st Annual Conference University of Agriculture, Makurdi, Benue State, February, 22nd – 26th, 2004.2004-02-222004-02-26
Madunagu, B. E., Udo, S. E., Umana, E. J. and Adung, E. A. (2005). Exploitation of phanerogamic parasites and epiphytic plants for their medicinal values. Nigerian Society for Plant Protection. 32th Annual Conference. University of Port Harcourt, PorMadunagu, B. E., Udo, S. E., Umana, E. J. and Adung, E. A. (2005). Exploitation of phanerogamic parasites and epiphytic plants for their medicinal values. Nigerian Society for Plant Protection. 32th Annual Conference. University of Port Harcourt, Port Harcourt, Rivers State, May 15th -20th, 2005.2005-05-152005-05-20
Umana, E.J., Madunagu, B. E., Udo, S. E. and Markson, A. A. (2005). Isolation of active ingredients from plants and their effect on fungi associated with Gmelinaarborea Roxb. Nigerian Society for Plants Protection. 32th Annual Conference University Umana, E.J., Madunagu, B. E., Udo, S. E. and Markson, A. A. (2005). Isolation of active ingredients from plants and their effect on fungi associated with Gmelinaarborea Roxb. Nigerian Society for Plants Protection. 32th Annual Conference University of Port Harcourt, Port, Rivers State, May 15th -20th, 2005.2005-05-152005-05-20
Udo, S. E , Madunagu, B. E., Umana, E. J. and Markson, A. A. (2005). Control of maize weevils in storage with commonly used spices. Nigerian Society for Plant Protection. 32th. Annual Conference, University of Port Harcourt, Port Harcourt, Rivers StaUdo, S. E , Madunagu, B. E., Umana, E. J. and Markson, A. A. (2005). Control of maize weevils in storage with commonly used spices. Nigerian Society for Plant Protection. 32th. Annual Conference, University of Port Harcourt, Port Harcourt, Rivers State, May 15th -20th, 2005.2005-05-152005-05-20
Markson, A. A., Madunagu, B. E., Umana, E. J. and Udo, S. E. (2005). A survey and biocontrol of post- harvest fruit rotting fungi of tomato. Nigerian Society for Plant Protection. 32th Annual Conference, University of Port Harcourt. Port Harcourt, Markson, A. A., Madunagu, B. E., Umana, E. J. and Udo, S. E. (2005). A survey and biocontrol of post- harvest fruit rotting fungi of tomato. Nigerian Society for Plant Protection. 32th Annual Conference, University of Port Harcourt. Port Harcourt, River State, May 15th -20th, 2005. 2005-05-152005-05-20
Madunagu, B. E., Udo, S. E., Umana, E. J. and Markson, A. A. (2008). Impact of rainfall on Colletotrichum leaf spot infection of cucurbits in Cross River State. Botanical Society of Nigeria. 17th Annual Conference, Ebonyi State University, Abakiliki,Madunagu, B. E., Udo, S. E., Umana, E. J. and Markson, A. A. (2008). Impact of rainfall on Colletotrichum leaf spot infection of cucurbits in Cross River State. Botanical Society of Nigeria. 17th Annual Conference, Ebonyi State University, Abakiliki, Ebonyi State, March 16th -19th, 2008.2008-03-162008-03-19
Udo, S. E., Madunagu, B. E., Umana, E. J. and Markson, A. A. (2008). Effect of Colletotrichum leaf spot on the net assimilation rate ( NAR) of Colocynthis citrillus and Cucurbita pepo. Botanical Society of Nigeria. 17th Annual Conference, Ebonyi StatUdo, S. E., Madunagu, B. E., Umana, E. J. and Markson, A. A. (2008). Effect of Colletotrichum leaf spot on the net assimilation rate ( NAR) of Colocynthis citrillus and Cucurbita pepo. Botanical Society of Nigeria. 17th Annual Conference, Ebonyi State University, Ebonyi State, March 16th -19th, 2008. 2008-03-162008-03-19
1. Okey, E. N., E. J. Umana, A. A. Markson and P. A. Okey (2012). Municipal Solid Waste characterization and management in Uyo, Akwa Ibom state Environment. Wessex Institute of Technology, New Forest, UK, 6th International Conference on Waste Managem1. Okey, E. N., E. J. Umana, A. A. Markson and P. A. Okey (2012). Municipal Solid Waste characterization and management in Uyo, Akwa Ibom state Environment. Wessex Institute of Technology, New Forest, UK, 6th International Conference on Waste Management and the Environment, July 4th-6th, 2012. 2012-07-042012-07-06
Umana, E. J., Akwaji, P.I. Udo, S. E., Markson, A. A. and Okey, E. N. (2012) Suppression of Fusarium wilth of tomato by organic soil amendment in Calabar, Cross River State, Nigeria. 5thAnnual Conference Mycological society of Nigeria Calabar 23rd -2Umana, E. J., Akwaji, P.I. Udo, S. E., Markson, A. A. and Okey, E. N. (2012) Suppression of Fusarium wilth of tomato by organic soil amendment in Calabar, Cross River State, Nigeria. 5thAnnual Conference Mycological society of Nigeria Calabar 23rd -27th September, 2012.2012-09-232012-09-27
Umana, E. J., Markson, A. A, Udo, SE, Asuquo , Ekaluo, U. B; Udensi O. and Andy E. (2012). Growth response of tomato plant to the Fusarium oxysporumand Botryodplodia theobromae infection 5th Annual conference, Mycological Society of Nigeria, CalabarUmana, E. J., Markson, A. A, Udo, SE, Asuquo , Ekaluo, U. B; Udensi O. and Andy E. (2012). Growth response of tomato plant to the Fusarium oxysporumand Botryodplodia theobromae infection 5th Annual conference, Mycological Society of Nigeria, Calabar 23rd – 27th September 2012.2012-09-232012-09-27
Umana, E. J., Markson, A. A, Udo, S. E., Okey E. N. Udo, I. J. and Akwaji P. I. (2012). Determinate of Host range of ChoanephoraCucurbitarum Beskley Ravenel and Thaxt among commonly cultivated vegetables in Calabar Cross River State 5th Annual ConfeUmana, E. J., Markson, A. A, Udo, S. E., Okey E. N. Udo, I. J. and Akwaji P. I. (2012). Determinate of Host range of ChoanephoraCucurbitarum Beskley Ravenel and Thaxt among commonly cultivated vegetables in Calabar Cross River State 5th Annual Conference Mycological society of Nigeria, Calabar 23rd -27th September 2012. 2012-09-232012-09-27
Umana, E. J., Udo, S. E., Markson, A. A, Okey E.N., Okon, E. I. and Madunagu, B. E. (2012). Post-harvest pathology of five Citrus species in Calabar, Cross River State, Nigeria 5th Annual conference, Mycological society of Nigeria, Calabar 23rd -Umana, E. J., Udo, S. E., Markson, A. A, Okey E.N., Okon, E. I. and Madunagu, B. E. (2012). Post-harvest pathology of five Citrus species in Calabar, Cross River State, Nigeria 5th Annual conference, Mycological society of Nigeria, Calabar 23rd -27th September 2012.2012-09-232012-09-27
Markson, A. A., Udo, S. E., Umana, E. J. and Agba, M. B., (2012). Bone Healing plants of Obudu Local Government of Cross River State 5th Annual Conference Mycological Society of Nigeria, 23rd 27th September, 2012.Markson, A. A., Udo, S. E., Umana, E. J. and Agba, M. B., (2012). Bone Healing plants of Obudu Local Government of Cross River State 5th Annual Conference Mycological Society of Nigeria, 23rd 27th September, 2012.2012-09-232012-09-27
Andy, I. E. Madunagu, B. E. and Umana E.J. (2012). Antimicrobial effect of combining the extracts of Lasienthera africana (Beauv) and Hensia crinita (Afzel G. Taylor) with Ampicillin and Chloramphenicol (2012). 5th Annual Conference, Mycological Andy, I. E. Madunagu, B. E. and Umana E.J. (2012). Antimicrobial effect of combining the extracts of Lasienthera africana (Beauv) and Hensia crinita (Afzel G. Taylor) with Ampicillin and Chloramphenicol (2012). 5th Annual Conference, Mycological society of Nigeria 23rd – 27th September, 2012.2012-09-232012-09-27
Akpan, J. B., Markson, A. A, Udo, S. E., and Umana, E. J. (2012). Evaluation of Antimicrobial effects of Alliumsativum and Alliumcepa on some wound pathogens 5th Annual conference , Mycological Society of Nigeria 23rd -27th September 2012.Akpan, J. B., Markson, A. A, Udo, S. E., and Umana, E. J. (2012). Evaluation of Antimicrobial effects of Alliumsativum and Alliumcepa on some wound pathogens 5th Annual conference , Mycological Society of Nigeria 23rd -27th September 2012.2012-09-232012-09-27
Umana, E. J. Akwaji, P.I. Udo, SE; Markson, A. A. and Orok, E. E. (2013). Solvent influence potency effect of Azaderachta in and Carica papayaextracts on fungi isolated from Gmelinaarborea seedlings. 6th Annual conference, Mycological Society of NiUmana, E. J. Akwaji, P.I. Udo, SE; Markson, A. A. and Orok, E. E. (2013). Solvent influence potency effect of Azaderachta in and Carica papayaextracts on fungi isolated from Gmelinaarborea seedlings. 6th Annual conference, Mycological Society of Nigeria Awka 10th -13th June 2013. 2013-06-102013-06-13
2. Markson, A. A.; Akwaji, P. I.; Umana, E. J.; Udo, S. E. Edelduok, C. N. (2015). Degradation of cellular structures of carrot (Daucuscarota L.) by some rots pathogens. Biopesticides Society of Nigeria (BpSN) 2nd Annual Conference, University of Cal2. Markson, A. A.; Akwaji, P. I.; Umana, E. J.; Udo, S. E. Edelduok, C. N. (2015). Degradation of cellular structures of carrot (Daucuscarota L.) by some rots pathogens. Biopesticides Society of Nigeria (BpSN) 2nd Annual Conference, University of Calabar, Cross River State, 30th November - 3rd December 2015.2015-11-302015-12-03
Ekpenyong, E. M.; Umana, E. J.; Markson, A. A.; Andem, A. B. and Ezuruike, F. C. (2015). The invitro effect of extracts of Spondiamombin and Vitexdonania on the growth and sporulation of Aspergillusniger. Biopesticides Society of Nigeria (BpSN) 2nd AEkpenyong, E. M.; Umana, E. J.; Markson, A. A.; Andem, A. B. and Ezuruike, F. C. (2015). The invitro effect of extracts of Spondiamombin and Vitexdonania on the growth and sporulation of Aspergillusniger. Biopesticides Society of Nigeria (BpSN) 2nd Annual Conference, University of Calabar, Cross River State, 30th November - 3rd December 2015.2015-11-302015-12-03