Prof. Rama D. Narla has been an academic member of staff for the last twenty six years in the Department of plan Science and Crop Protection. Prof. Narla holds a PhD in Microbiology from Osmania University, Hyderabad, India and an MSc in Mycology and Plant Pathology from Barnaras Hindu University and BSc in Agriculture from Andhra Pradesh Agricultural University in India.

Since joining the University in 1989, Prof. Narla has actively engaged in research, student training and outreach in key areas of Plant Pathology, Virology and general crop protection.




Birithia, R;, Subramanian S;, Villinger J;, Muthomi J;, Narla RD;, Pappu HR.  Submitted.  Distribution of tospoviruses, Iris yellow spot virus infecting onions in Kenya.


WAHOME, SW, P.M. Kimani, J.W. Muthomi, Narla RD.  2013.  Quality and yield of snap bean lines locally developed in Kenya. International Journal of Agronomy and Agricultural Research (IJAAR). 3(7):1-10.quality_and_yield_of_snap_bean_lines_locally_developed_in_kenya.pdf


S.M.1, G, J.W.2 M, R.D.2 N, J.H.2 N, F.M.2 O, J.M.3 W.  2012.  Management of thrips (Thrips tabaci) in bulb onion by use of vegetable intercrops. International Journal of AgriScience Vol. 2(5): 393-402, May 2012. 2(5):393-402.management_of_thrips_in_bulb_onion_by_use_of_veg_intercrops.
R, B, S S, J V, Muthomi J, R.D N, H.R. P.  2012.  Resistance Screening of onion cultivars to Thrips and Iris yellow spot virus. 24th congress on International Congress of Entomology 17-25th August, 2012. , Daegu-Korea
Subramanian, BR, S.Villinger, Muthomi J, R.D NJ, Pappu HR.  2012.  First report of Tomato yellow ring virus (Tospovirus, Bunyaviridae) Infecting tomatoes in Kenya. 96(1384)


Muthomi, JW;, Gachu SM;, Narla RD;, Nderitu J.  2011.  Management of thrips in bulb onions using vegetable intercrops.
Luambano, N;, Kimenju JW;, Narla R;, Waceke JW.  2011.  Colonisation of the Rhizosphere of plants which are poor host to root-knot nematodes by the biological agent Pochonia chlamydosporia. Abstract

Management of root-knot nematodes (Meloidogyne spp.,) using fungi that parasitize eggs of root-knot and cyst nematodes has been gaining popularity. Application of this fungus to plants that are poor host to root-knot nematodes has shown good results. This study was conducted to screen plants that support growth of Pochonia chlamydosporia on its rhizosphere. Seedlings of cabbage, sunhemp, maize, velvet bean, African marigold and tomato were planted in pots containing sterilized soil which had Pochonia chlamydosporia. Thirty days after planting, the fungal propagules in the soil and roots increased significantly (P<0.05) in all plants with the exception of velvet beans. Ninety days after planting, the counts of the fungal propagules taken from the soil were significant higher (P<0.05) in the rhizosphere where maize was planted than in other plants. This study concluded that maize is a promising rotational in system where P. chlamydosporia is used as a biocontrol agent.

J., M, Narla RD, Musyimi SL, WAGACHA JOHNMAINA.  2011.  Occurrence of Fusarium species and associated T2-toxin in Kenyan wheat. Agriculture Science and Technology. 3(1):24-34.occurrence_of fusarium_species_and_associated_toxins.
WAHOME, SW, Kimani PM, Muthomi JW, Narla RD, BURUCHARA1 R.  2011.  MULTIPLE DISEASE RESISTANCE IN SNAP BEAN GENOTYPES IN KENYA. African Crop Science Journal. 19( 4):289-302.multiple_resistance_in_snap_bean_genotypes_in_kenya.
R.D, N, Muthomi JW, Gachu SM, Nderitu JH, Olubayo FM.  2011.  Effect of Intercropping bulb onion and vegetables on purple blotch and downy mildew. Journal of Biological Sciences . 11(1):52-57.effect_of_intercropping_bulb_onion_and_vegetables.pdf
R.O, N, Kiplagat KW, Kiplagat KW, R.D N, S.J S, J.N K, J.A L.  2011.  Early and late harvest agronomic performance and stability of R-free late blight potato genotypes. Crop Improvement.
Subramanian, S, H.R P, Birithia, R. S, Muthomi O, P JS, R.D N.  2011.  Diversity and distribution of Iris yellow spot virus infecting onions . Narla, R.D. 101(S172)
S, BRS, Pappu HR, Sseruwagi, P. M, R.D N.  2011.  First Report of Iris yellow spot virus in Onion in Kenya and Uganda. Plant Disease . 95(1195)


Birithia, RL;, Subramanian S;, Muthomi J;, Narla RD.  2010.  Distribution Of The Tospovirus Iris Yellow Spot Virus Infecting Onions In Kenya..
Musoni1*, A, Paul Kimani2, R. D. Narla2, Buruchara3 R, Kelly4 J.  2010.  Inheritance of fusarium wilts (Fusarium oxysporum F. sp. phaseoli) resistance in climbing beans. African Journal of Agricultural Research. 5(5):399-404,4.inheritance_of_fusarim_wilts_resistance_in_climbing_beans.
R, B, S S, Villinger.J, J M, R.D N, H.R P.  2010.  Distribution of tospoviruses, Iris yellow spot virus infecting onions in Kenya. 10th Workshop on Sustainable Horticultural Production in the Tropics . , JKUAT
B, M, Olubayo F, Narla R, Songa J, Amata R, Kyamanywa S, Ateka EM.  2010.  First record of spiraling whitefly in coastal Kenya: emergence, host range, distribution and association with cassava brown streak virus disease. Int. J. Agric. Biol. 12:411–415..


Kimenju, JW, Odero GOM, Mutitu EW, Wachira PM, Muiru WM.  2009.  Suitability of Locally Available Substrates for Oyster Mushroom (Pleurotus ostreatus) Cultivation in Kenya. AbstractWebsite

This study aimed at evaluating the suitability of selected substrates for mushroom production. Ten different substrates namely water hyacinth ( Eichhornia crassipes ), maize cobs ( Zea mays ), coconut fibre ( Cocos nucifera ), finger millet straw ( Seteria microcheata ), banana fibre ( Musa sp.), sawdust ( Eucalyptus sp.), rice straw ( Oryza sativa ) bean straw ( Phaseolus vulgaris ) and wheat straw ( Tritichum aestivum ) were tested for their suitability in mushroom production. Plastic bags were filled with 250 g of substrate and arranged in a randomized complete block design. The substrates had a significant (p≤0.05) effect on days to pinning, number of caps and biological efficiency. Compared to the control, which pinned at 28 days, maize cobs, sawdust and coconut fiber had short pinning durations of 19, 22 and 23 days, respectively. With the exception of sawdust, water hyacinth and maize cobs, the rest of the organic substrates significantly increased the marketable caps of the oyster mushroom. The straws, namely, bean, rice, finger millet and wheat had the highest biological efficiency in decreasing order of 106, 92, 85 and 77%, respectively. Stipe length was longest in oyster mushroom grown on bean straw, followed by finger millet straw, maize cobs, banana fiber and shortest in sawdust. Mushroom yield was, 80, 78, 76, 73 and 68%, higher in bean straw, rice straw, millet straw, wheat straw and banana fibre treatment compared to the control. Mushroom yields on sawdust were 60% lower than the control. In descending order of suitability bean, rice, finger millet and wheat straws can be recommended for oyster mushroom production.

B, M, Narla RD, Amata R, Olubayo F, Songa J, Kyamanyua S, Ateka EM.  2009.  Efficiency of cassava brown streak virus transmission by two whitefly species in coastal Kenya. General and Molecular Virology . 1(4):040-045.efficiency_of_cbvs_transmission_by_2_whitefly_species_in_coastal_kenya1.pdf


N, L, Kerry BR, Kimenju JW, Narla RD, Wanjohi JW.  2008.  Screening of Locally Available Organic Materials for the Mass Production of a Biological agent, Pochonia chlamydosporia Used Against Root-knot Nematodes. Fifth International Congress of Nematology. , Brisbane, Australia.

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