Dr. James Wanjohi Muthomi
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Dr. James Wanjohi Muthomi

Associate Professor
University of Nairobi, Kenya


Highest Degree
Ph.D. in Crop Protection from University of Nairobi, Kenya

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Area of Interest:

Plant and Soil Sciences
100%
Plant Pathology
62%
Crop Protection
90%
Plant Disease
75%
Horticulture
55%

Research Publications in Numbers

Books
0
Chapters
0
Articles
0
Abstracts
0

Selected Publications

  1. Stasiewicz, M.J., T.D. Falade, M. Mutuma, S.K. Mutiga and J.J. Harvey et al., 2017. Multi-spectral kernel sorting to reduce aflatoxins and fumonisins in Kenyan maize. Food Control, 78: 203-2014.
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  2. Mutinda, Y.A., J.W. Muthomi, J.M. Kimani, G.N. Cheminigw'wa and F.M. Olubayo, 2017. Viability and dormancy of rice seeds after storage and pre-treatment with dry heat and chemical agents. J. Agric. Sci. (In Press). .
  3. Muthomi, J.W., G.M.W. Lengai, M.J. Wagacha and R.D. Narla, 2017. In vitro activity of plant extracts against some important plant pathogenic fungi of tomato. Aust. J. Crop Sci. (In Press). .
  4. Muthomi, J.W., A.M. Fulano, J.M. Wagacha and A.W. Mwang'ombe, 2017. Management of snap bean insect pests and diseases by use of antagonistic fungi and plant extracts. Sustain. Agricult. Res. (In Press). .
  5. Malemba, G.M., F.M. Nzuve, J.M. Kimani, M.F. Olubayo and J.W. Muthomi, 2017. Combining ability for drought tolerance in upland rice varieties at reproductive stage. J. Agric. Sci., 9: 138-150.
  6. Akello, M.O., F. Nzuve, F. Olubayo, G. Macharia and J. Muthomi, 2017. Identification of resistance sources to wheat stem rust from introduced genotypes in Kenya. J. Agric. Sci., Vol. 9. .
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  7. Wagacha, J.M., N.K. Njeru, O.O. Okumu, J.W. Muthomi and C.K. Mutegi, 2016. Occurrence of Fusarium head blight of wheat and associated mycotoxins in Narok and Nakuru Counties, Kenya. World J. Agric. Res., 4: 119-127.
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  8. Okumu, O.O., J.W. Muthomi, C.K. Mutegi and J.M. Wagacha, 2016. Resistance of Kenyan wheat germplasm to Fusarium head blight and deoxynivalenol contamination. Int. J. Agron. Agric. Res., 9: 22-35.
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  9. Njeru, N.K., J.W. Muthomi, C.K. Mutegi and J.M. Wagacha, 2016. Effect of cropping systems on accumulation of Fusarium head blight of wheat inocula in crop residues and soils. J. Plant Sci., 11: 12-21.
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  10. Mugambi, I., F. Williams, J. Muthomi, F. Chege and M. Oronje, 2016. Diagnostic support to plantwise plant doctors in Kenya. J. Agric. Exten. Rural Dev., 8: 232-239.
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  11. Mdenye, B.B., J.M. Kinama, F.M. Olubayo, B.M. Kivuva and J.W. Muthomi, 2016. Effect of storage methods on carbohydrate and moisture of cassava planting materials. J. Agric. Sci., 8: 100-111.
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  12. Maina, A.W., J.M. Wagacha, F.B. Mwaura, J.W. Muthomi and C.P. Woloshuk, 2016. Postharvest practices of maize farmers in Kaiti district, Kenya and the impact of hermetic storage on populations of Aspergillus spp. and aflatoxin contamination. J. Food Res., 5: 53-66.
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  13. Maina, A.W., J.M. Wagacha, F.B. Mwaura, J.W. Muthomi and C.P. Woloshuk, 2016. Assessment of farmers maize production practices and effect of triple-layer hermetic storage on the population of Fusarium spp. and fumonisin contamination. World J. Agric. Res., 5: 21-30.
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  14. Leitich, R.K., W. Arinaitwe, B. Mukoye, D.O. Omayio and A.K. Osogo et al., 2016. Mapping of angular leaf spot disease hotspot areas in Western Kenya towards its management. Am. J. Applied Scient. Res., 2: 75-81.
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  15. Langa, F.P., W.M. Muiru, D. Mbuge, L.R. M'Ragwa, F.M. Olubayo and J.W. Muthomi, 2016. Influence of endosperm types, seed moisture content and threshing methods on germination and seedling vigour of sorghum. World J. Agric. Sci., 12: 378-383.
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  16. Fulano, A.M., J.W. Muthomi, J.M. Wagacha and A.W. Mwang'ombe, 2016. Antifungal activity of local microbial isolates against snap bean pathogens. Int. J. Curr. Microbiol. Applied Sci., 5: 112-122.
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  17. Sserumaga, J.P., D. Makumbi, L. Simyung, K. Njoroge and J.W. Muthomi et al., 2015. Incidence and severity of potentially toxigenic Aspergillus flavus in maize (Zea mays L.) from different major maize growing regions of Uganda. Afr. J. Agric. Res., 10: 1244-1250.
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  18. Sserumaga, J.P., D. Makumbi, H. Ji, K. Njoroge and J.W. Muthomi et al., 2014. Molecular characterization of tropical maize inbred lines using microsatellite DNA markers. Maydica, 59: 267-274.
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  19. Ouma, B., J. Muthomi, J. Nderitu and F. Toroitich, 2014. Management of trips in French beans by integrating biological and synthetic pesticides in conventional spray regimes. J. Renewable Agric., 2: 27-37.
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  20. Njogu, M., R. Nyankanga, J. Muthomi and E. Muindi, 2014. Studies on the effects of stinging nettle extract, phosphoric acid and conventional fungicide combinations on the management of potato late blight and tuber yield in the Highlands of Kenya. Direct Res. J. Agric. Food Sci., 2: 119-127.
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  21. Njogu, M., E. Muindi, J. Muthomi, R. Nyankanga and P. Muchiri, 2014. Phytophthora infestans responses to stinging nettle extract, phosphoric acid and fungicides combination, in Kenya. Direct Res. J. Agric. Food Sci., 2: 128-134.
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  22. Muthomi1, J.W., I.K. Mugambi, J. Ojiem, G.N. Chemining’wa and J.H. Nderitu, 2014. Effect of incorporating lablab biomass in soils on root rot disease complex and yield of beans intercropped with maize. Int. J. Agrisci., 4: 515-524.
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  23. Muriungi, S.J., E.W. Mutitu and J.W. Muthomi, 2014. Efficacy of cultural methods in the control of Rhizoctonia solani strains causing tomato damping off in Kenya. Afr. J. Food Agric. Nutr. Dev., 14: 8776-8790.
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  24. Kubiriba, J., J. Muthomi, V. Ndungo, J. Kwach and E. Rockfeller et al., 2014. Strategies for rehabilitation of banana fields infested with Xanthomonas campestris pv. musacrearum. J. Crop Prot., 3: 21-29.
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  25. Birithia, R.K., S. Subramanian, J.W. Muthomi and R.D. Narla, 2014. Resistance to Iris yellow spot virus and onion thrips among onion varieties grown in Kenya. Int. J. Trop. Insect Sci., 34: 73-79.
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  26. Wahome, S.W., P.M. Kimani, J.W. Muthomi and R.D. Narla, 2013. Quality and yield of snap bean lines locally developed in Kenya. Int. J. Agron. Agric. Res., 3: 1-10.
  27. Tom, F.K., J.W. Muthomi, F.M. Olubayo and G.N. Chemining'wa, 2013. Resistance of locally grown maize genotypes to infestation by maize weevil (Sitophilus zeamais Motsch). East Afr. Agric. For. J., 78: 257-265.
  28. Muthomi, J.W., R.W. Weru, G.N. Chemining’wa and E.W. Mutitu, 2013. Tolerance of maize varieties to infection by Aspergillus flavus and aflatoxin accumulation. East Afr. Agric. For. J., 78: 113-118.
  29. Kitonyo, O.M., G.N. Chemining'wa and J.W. Muthomi, 2013. Productivity of farmer-preferred maize varieties intercropped with beans in semi-arid Kenya. Int. J. Agron. Agric. Res., 3: 6-16.
  30. Karanja, L.W., P.M. Wachira, J.W. Muthomi, N.A. Phiri and C.K. Mutegi et al., 2013. Use of geographical information system to determine incidence of Aspergillus section flavi in different soils in Kaiti, Kenya. East Afr. Agric. For. J., Vol. 78. .
  31. Birithia, R., S. Subramanian, H.R. Pappu, J. Muthomi and R.D. Narla, 2013. Analysis of Iris yellow spot virus replication in vector and non‐vector thrips species. Plant Pathol., 62: 1407-1414.
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  32. Bigirimana, J., K. Njoroge, J.W. Muthomi, D. Gahakwa, N.A. Phiri, E.K. Gichuru and D.J. Walyaro, 2013. Genetic diversity among disease resistant coffee varieties and cultivars in Rwanda based on RAPD and SSR markers. J. Renewable Agric., 1: 106-112.
  33. Nyankanga, R., M. Njogu, J. Muthomi and M. Olanya, 2012. Efficacy of fungicide combinations, phosphoric acid and plant extract from stinging nettle on potato late blight management and tuber yield. Arch. Phytopathol. Plant Prot., 45: 1449-1463.
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  34. Muthomi, J.W., S.L. Musyimi, J.M. Wagacha and R.D. Narla, 2012. Occurrence of Fusarium species and associated T2-toxin in Kenyan wheat. Agric. Sci., 3: 24-34.
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  35. Muthomi, J.W., B.K. Mureithi, G.N. Chemining'wa, J.K. Gathumbi and E.W. Mutit, 2012. Aspergillus species and Aflatoxin b1 in soil, maize grain and flour samples from semi-arid and humid regions of Kenya. Int. J. AgriSci., 2: 22-34.
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  36. Musyimi, S.L., J.W. Muthomi, R.D. Narla and J.M. Wagacha, 2012. Efficacy of biological control and cultivar resistance on fusarium head blight and T-2 toxin contamination in wheat. Am. J. Plant Sci., 3: 599-607.
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  37. Jonah, N., G.N. Chemining'wa, J.W. Muthomi and S.I. Shibairo, 2012. Effect of Rhizobium inoculation and nitrogen fertilizer application on growth, nodulation and yield of two garden pea genotypes. J. Anim. Plant Sci., 15: 2147-2156.
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  38. Gachu, S.M., J.W. Muthomi, R.D. Narla, J.H. Nderitu, F.M. Olubayo and J.M. Wagacha, 2012. Management of thrips (Thrips tabaci) in bulb onion by use of vegetable intercrops. Int. J. Agric. Sci., 2: 393-402.
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  39. Chemining'wa, G.N., J. Ngeno, J.W. Muthomi and S.I. Shibairo, 2012. Effectiveness of indigenous pea rhizobia (Rhizobium leguminosarum bv. viciae) in cultivated soils of central Kenya. J. Applied Biosci., 57: 4177-4185.
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  40. Wahome, S.W., P.M. Kimani, J.W. Muthomi, R.D. Narla and R. Buruchara, 2011. Multiple disease resistance in Snap bean genotypes in Kenya. Afr. Crop Sci., 19: 289-302.
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  41. Narla, R.D., J.W. Muthomi, S.M. Gachu, J.H. Nderitu and F.M. Olubayo, 2011. Effect of intercropping bulb onion and vegetables on purple blotch and downy mildew. J. Biol. Sci., 11: 52-57.
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  42. Muthomi, J.W., T.N. Kinyungu, J.H. Nderitu, F.M. Olubayo and J.N. Kabira, 2011. Spatial arrangement of maize as border crop to manage aphids and aphid-transmitted viruses in potato. East Afr. Agric. Forest. J., 76: 21-29.
  43. Muthomi, J.W., T.N. Kinyungu, J.H. Nderitu and F.M. Olubayo, 2011. Incidence of aphid-Transmitted viruses in farmer-produced seed potato tubers in Kenya. Afr. J. Hortic. Sci., 5: 18-25.
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  44. Muthomi, J.W., K.K. Muimui and P.M. Kimani, 2011. Inheritance of resistance to angular leaf spot in yellow beans. Afr. Crop Sci. J., 19: 267-275.
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  45. Muimui, K.K., P.M. Kimani and J.W. Muthom, 2011. Resistance and inheritance of common bacterial blight in yellow bean. Afr. Crop Sci. J., 19: 277-287.
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  46. Chemining'wa, G.N., S.W.M. Theuri and J.W. Muthomi, 2011. Abundance of indigenous rhizobia nodulating cowpea and common bean in central Kenyan soils. Afr. J. Hortic. Sci., 5: 92-97.
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  47. Birithia, R., S. Subramanian, H.R. Pappu, P. Sseruwagi, J.W. Muthomi and R.D. Narla, 2011. First report of Iris yellow spot virus infecting onion in Kenya and Uganda. Plant Dis., 95: 1195-1195.
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  48. Wagacha, J.M., U. Steiner, H.W. Dehne, S. Zuehlke, M. Spiteller, J. Muthomi and E.C. Oerke, 2010. Diversity in mycotoxins and fungal species infecting wheat in Nakuru District, Kenya. J. Phytopathol., 158: 527-535.
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  49. Otieno, P.E., J.W. Muthomi, G.N. Chemining'wa and J.H. Nderitu, 2009. Effect of rhizobia inoculation, farm yard manure and nitrogen fertilizer on nodulation and yield of food grain legumes. J. Biol. Sci., 9: 326-332.
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  50. Muthomi, J.W., L.N. Njenga, J.K. Gathumbi and G.N. Chemining`wa, 2009. The occurrence of aflatoxins in maize and distribution of mycotoxin-producing fungi in Eastern Kenya. Plant Pathol. J., 8: 113-119.
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  51. Muthomi, J.W., J.N. Nyaga, F.M. Olubayo, J.H. Nderitu and J.N. Kabira et al., 2009. Incidence of aphid-transmitted viruses in farmer-based seed potato production in Kenya. Asian J. Plant Sci., 8: 166-171.
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  52. Muindi, E.M., J.W. Muthomi, J.H. Nderitu, F.M. Olubayo and J.N. Kabira et al 2009. Use of cereal border crops in management of aphid-transmitted viral diseases during seed potato production. Afr. J. Hortic. Sci., 2: 69-78.
  53. Wagacha, J.M. and J.W. Muthomi, 2008. Mycotoxin problem in Africa: Current status, implications to food safety and health and possible management strategies. Int. J. Food Microbiol., 124: 1-12.
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  54. Riungu, G.M., J.W. Muthomi, R.D. Narla, J.M. Wagacha and J.K. Gathumbi, 2008. Management of Fusarium head blight of wheat and deoxynivalenol accumulation using antagonistic microorganisms. Plant Pathol. J., 7: 13-19.
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  55. Mutitu, E.W., J.M. Wagacha, J.W. Muthomi and F.B. Mwaura, 2008. Control of bean rust on snap beans (Phaseolus vulgaris l.) using antibiotic metabolites produced by Bacillus and Streptomyces species. Botswana J. Agric. Applied Sci., 4: 62-69.
  56. Muthomi, J.W., P.E. Otieno, G.N. Chemining`wa, J.H. Nderitu and J.M. Wagacha, 2008. Effect of chemical spray on insect pests and yield quality of food grain legumes. J. Entomol., 5: 156-163.
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  57. Muthomi, J.W., J.K. Ndung`u, J.K. Gathumbi, E.W. Mutitu and J.M. Wagacha, 2008. The occurrence of Fusarium species and mycotoxins in Kenyan wheat. Crop Prot., 27: 1215-1219.
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  58. Muthomi, J.W., G.M. Riungu, J.K. Ndung'u, R.D. Narla, J.K. Gathumbi and J.M. Wagacha, 2008. Head blight of wheat in kenya and contamination of grain with mycotoxin producing Fusarium species. J. Plant Sci., 3: 52-60.
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  59. Wagacha, J.M., J.W. Muthomi, E.W. Mutitu and F.B. Mwaura, 2007. Control of bean rust using antibiotics produced by Bacillus and Streptomyces species-Translocation and Persistence in Snap Beans. J. Applied Sci. Environ. Manage., 11: 165-168.
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  60. Wagacha, J.M. and J.W. Muthomi, 2007. Fusarium culmorum: Infection process, mechanisms of mycotoxin production and their role in pathogenesis in wheat. Crop Protection, 26: 877-885.
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  61. Muthomi, J.W., P.E. Otieno, G.N. Chemining wa, J.H. Nderitu and J.M. Wagacha, 2007. Effect of legume root rot pathogens and fungicide seed treatment on nodulation and biomass accumulation. J. Boil. Sci., 7: 1163-1170.
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  62. Muthomi, J.W., J.K. Ndung`u , G.N. Chemining`wa and J.M. Wagacha, 2007. Reaction of some Kenyan wheat cultivars to head blight after inoculation with Fusarium graminearum. Asian J. Plant Sci., 6: 585-591.
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  63. Chemining'wa, G.N., J.W. Muthomi, J.G. Mureithi and C.K.K. Gachene, 2007. Response of green manure legumes to rhizobia inoculation and starter-N fertilizer application. Botswana J. Agric. Applied Sci., 3: 164-169.
  64. Chemining'wa, G.N., J.W. Muthomi and S.W.M. Theuri, 2007. Effect of rhizobia inoculation and starter-n on nodulation, shoot biomass and yield of grain legumes. Asian J. Plant Sci., 6: 1113-1118.
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  65. Muthomi, J.W., E.C. Oerke, H.W. Dehne and E.W. Mutitu, 2002. Susceptibility of Kenyan wheat varieties to head blight, fungal invasion and deoxynivalenol accumulation inoculated with Fusarium graminearum. J. Phytopathol., 150: 30-36.
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  66. Muthomi, J.W., E.C. Oerke, E.W. Mutitu, A. Schade-Schutze and H.W. Dehne, 2002. Variation among Fusarium species and isolates infecting wheat ears based on aggressiveness, mycotoxin production and RAPD-PCR analysis. J. Plant Dis. Prot., 109: 462-477.
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  67. Muthomi, J.W., A. Schutze, H.W. Dehne, E.W. Mutitu and E.C. Oerke, 2000. Characterization of Fusarium culmorum isolates by mycotoxin production and aggressiveness to winter wheat. Zeitschrift fur Pflanzenkrankheiten und Pflanzenschutz, 107: 113-123.
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  68. Mutitu, E.W. and J.W. Muthomi, 1994. Control of carnation Fusarium wilt using antibiotics culture filtrate from Streptomyces Spp. Afr. Crop Sci. J., 2: 111-116.
    PubMed  |