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Leopold M. Nyochembeng, Ph.D.

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Research Assistant Professor of Plant Pathology 

Department: Biological and Environmental Sciences,

Plant Science and Biotechnology      

Address: CCS – BW Room 218 B, P.O. Box 1208,

Alabama A&M University, Normal, AL 35762        

Tel: 256-372-4218;      Fax:     256-372-5429



PhD    Plant Pathology, Alabama A&M University

MS      Plant Science (Plant Biotechnology), Alabama A&M University

BS       Crop Production, University of Dschang, Cameroon    


Plant Tissue Culture Methods and Applications (NRE 537)

Plant Growth and Development (NRE 564)

Plant Disease Diagnosis (NRE 532)

Plant Virology (NRE 567)

Plant Pathology Techniques (NRE 562)

Plant Propagation (NRE 421/521)

Ornamentals I – Trees and Shrubs, NRE 423/523


Efforts in our laboratory are focused on characterization of host-pathogen interactions and biological control of vegetable crop diseases. We undertake various research projects dealing with sustainable/integrated disease management in organic and conventional vegetable production systems; the development of biopesticides from fungal metabolites, biochemical/molecular mechanisms of biotic and abiotic stress resistance/tolerance associated with plant growth promoting beneficial microorganisms in vegetable crops. Other areas of interest include mushroom cultivation, technologies for seed treatment and seed health testing and broad-sense plant biotechnology.

Synergistic activities:

Mentor undergraduate students; Advise graduate students and serve on Thesis/Dissertation Committees; Adhoc reviewer for HortScience, African J. of Biotechnology, Bioresource Technology, Crop Science, Crop Protection, J. of Crop Improvement and others; Member, editorial board for the Journal of Waste Conversion, Bioproducts and Biotechnology, and advise and train small vegetable growers on sustainable integrated disease management (IDM) tactics for vegetable crops.

Member:  American Phytopathological Society (APS)

                American Society of Agronomy (ASA) and Crop Science Society of                  America (CSSA)

                APS – Southern Branch

Selected Publications:

Nyochembeng, L.M. and C. A. Beyl. 2014. Induction and characterization of pathogenesis-related (PR) protein in cocoyam (Xanthosoma sagittifolium) inoculated with Pythium myriotylum. African J. Biotechnology (In Press).

Nyochembeng, L.M., I. Holloway and S. Hopkinson. 2014. Production of Sclerotium rolfsii sclerotia in the aboratory and assessment of the antimicrobial property of the sclerotial extracts. Crop Protection (In review).

Nyochembeng, L.M., R.N. Mankolo S.R. Mentreddy, and G. Mayalagu. 2014. Cover crop, reflective polyethylene mulch and biofungicide effects on yield and management of diseases in field-grown organic tomato. HortScience (In review).

Nyochembeng, L.M., H. Kaur., S.R. Mentreddy and E. Cebert. 2013. Antibacterial activity of mycelial extract from submerged cultures of shiitake (Lentinula edodes) strains. Phytopathology 103:S2, 105.

Nyochembeng, L.M., R.N. Mankolo and K. Golson-Garner. 2013. Organic mulches for managing weeds on raised soil beds. ACES UNP-0151.

Obeng, E., E. Cebert., B.P. Singh., R. Ward., L.M. Nyochembeng, and D.A. Mays. 2012.Growth and grain yield of pearl millet (Pennisetum glaucum) genotypes at different levels of nitrogen fertilization in the southeastern United States. J. Agric. Sci. 4:155-1

Nyochembeng, L.M., R.N. Mankolo, S.R. Mentreddy. 2010. Organic and polyethylene mulches with biofungicides for managing diseases in organic tomato production system. Phytopathology 100:S91.

Nyochembeng, L.M., R.N. Mankolo, S.R. Mentreddy and  G. Mayalagu. 2009. Effect of fall cover crops ontomato and pepper diseases and fruit yield under organic production in North Alabama. Phytopathology 99:S9

Gonzales, J.M. Jr., B.A. Lowry., P.B. Brown., C.A. Beyl and L.M. Nyochembeng. 2009. The effects of composting on the nutritional composition of fibrous bio-regenerative life support systems (BLSS) plant waste residues and its impact on growth of Nile tilapia (Oreochromis niloticus). Advances in Space Research 43:1243-1249.

Nyochembeng, L.M. 2008. Micropropagation of tropical root and tuber crops. In: C.A. Beyl and R.N. Trigiano (Eds.), Plant Propagation Concepts and Laboratory Exercises. CRC Press, Boca Raton, FL. Pp 355-364.

Nyochembeng, L.M., C. A. Beyl and R.P. Pacumbaba. 2008. Optimizing edible fungal growth and biodegradation of inedible crop residues using various cropping methods. Bioresource Technology 99:5645-5649.

Nyochembeng, L.M., C. A. Beyl, and R.P. Pacumbaba. 2007. Peroxidase activity, isozyme patterns and electrolyte leakage in roots of cocoyam infected by Pythium myriotylum. Journal of Phytopathology 155:454-461.

Nyochembeng, L.M., C. A. Beyl and R.P. Pacumbaba. 2007. Nitrogen amendment enhances edible white rot fungal growth and biodegradation of containerized inedible crop residues. Habitation 11:133-138.