Dr. Ruth Kahuthia-Gathu

Title: Dr.
Position: Senior Lecturer 
Agricultural Science and Technology
Area of Specialization:
Agriculture Entomology
Contact Address: P.O. Box 43844 Nairobi 00100

View full CV pdf

 Research Interests 

 Use of natural enemy’s in the management of arthropod pests. With a bias on Integrated Pest Management (IPM) strategies of the horticultural crops. Research in areas related in conservation of the natural enemies in order to reduce on pesticides.  Sustain biodiversity.


Referred Journals

    • Othim, S.T.O., R. Srinivasan, R. Kahuthia-Gathu, T. Dubois, S. Ekesi, K.K.M. Fiaboe. 2019. Effect of host age and density on the performance of Apanteles hemara (Hymenoptera: Braconidae), a larval endoparasitoid of Spoladea recurvalis (Lepidoptera: Crambidae). Journal of Economic Entomology. In Press.
    • Stephen T. O. Othim, Srinivasan Ramasamy, Ruth Kahuthia-Gathu, Thomas Dubois,Sunday Ekesi,and Komi K. M. Fiaboe.The Effects of Pest-Resistant Amaranth Accessions on the Performance of the Solitary Endoparasitoid Apanteles hemara (Hymenoptera: Braconidae) Against the Amaranth Leaf-Webber Spoladea recurvalis (Lepidoptera:Crambidae). Environmental Entomology, XX(X), 2018, 1–10.
    • Stephen T. O. Othim, Srinivasan Ramasamy, Ruth Kahuthia-Gathu, Thomas Dubois,Sunday Ekesi,and Komi K. M. Fiaboe. Screening for resistance against major lepidopteran and stem weevil pests of amaranth in Tanzania. Euphytica (2018) 214:182
    • Stephen, T.O.Othim, Srinivasan Ramasamy, Ruth Kahuthia-Gathu, Thomas Dubois, Sunday Ekesiand Komi K.M.Fiaboe (2018). Expression of Resistance in Amaranthus spp. (Caryophyllales: Amaranthaceae): Effects of Selected Accessions on the Behaviour and Biology of the Amaranth Leaf-Webber, Spoladea recurvalis (Lepidoptera: Crambidae). Insects 2018, 9(2), 62;
    • Kahuthia-Gathu, R., Kirubi, DT. and Gitonga D. (2018). Composition and abundance of wood-boring beetles of Acacia xanthophloea and their associated natural enemies in Thika, Kenya. Journal of Asia-Pacific Biodiversity, 11: 248-254.
    • Othim, S.T.O., Kahuthia-Gathu, R., Akutse, K.S., Foba, C.N. and Fiaboe, K.K.M. (2018). Seasonal occurrence of amaranth Lepidopteran defoliators and effect of attractants and amaranth lines in their management. Journal of Applied Entomology: 00:1–9.
    • Kahuthia-Gathu, R., Kirubi, D. T., Wangu, L. andKimani, R. (2018).  Bostrichidae Beetles associated with Acacia xanthoploea in Nairobi and Machakos Counties, Kenya.  PloS ONE 13(3): e0188773.
    • Kahuthia-Gathu, R., Kirubi, D. T. and Nangalama D. (2018). Abundance and Distribution of Heterostigmatic Mites Tarsonemus Sp., on Wood-Boring Beetles Recovered from Acacia Xanthophloea in Kenya. Journal of Biodiversity Management & Forestry. 7.1. DOI:
    • Sammy Kiprotich Cheruiyot, H. Michael G. Lattorff, Ruth Kahuthia-Gathu, Jenard Patrick Mbugi, and Elliud Muli (2018). Varroa- specific hygienic behavior of Apis mellifera scutellata in Kenya. Apidologie: 49:439-449.     DOI:
    • and K. K. M. Fiaboe (
    • Kahuthia-Gathu R. Maina Mwangi and Fiaboe M.O. (2017). Assessing and Enhancing Impact of Cotesia vestalis in the Management of Diamondback Moth Plutella xylostella on Kales in Semi-Arid Areas of Kenya. Journal of Environmental and Agricultural Sciences. Vol 11:1-13.
    • Ofgaa Djirata, Emana Getu andRuth Kahuthia-Gathu. (2017). Association of a native predator Chilocorus sp. (Coleoptera: Coccinelidae) with a new exotic mango pest, Aulacaspis tubercularis Newstead (Hemiptera: Diaspididae) in Ethiopia.Israel Journal of Entomology, Vol. 47, 1–8
    • Kahuthia-Gathu, R., Nyambo, B. and Subramanian, S. (2017). Impact of introduced parasitoid Cotesia vestalis (Hymenoptera: Braconidae) on Plutella xylostella (Lepidoptera: Plutellidae) and its parasitoid guild on kale in semi-arid areas in Kenya. International Journal of Tropical Insect Science, 1-13. doi:10.1017/S1742758417000091
    • ·Muui Nancy Nyaruai, Robert Kinyua, and Ruth Gathu. (2016). Factors affecting management of safety and health in the building construction industry in Nakuru County, Kenya. International Journal of Innovation and Applied Studies Vol. 18 No. 1,  83-89
    • Ofgaa Djirata, Emana Getu and Kahuthia-Gathu, R. (2016). Trend in Mango Production and Potential Threat from Emerging White Mango Scale, Aulacaspis tubercularis (Homoptera: Diaspididae) in Central and Eastern Kenya. Journal of Natural Sciences Research
    • Njau, N., M. Mwangi, R. Kahuthia-Gathu, R. Muasya and J.N. Mbaka. (2014). Macropropagation technique for producing cost-effective healthy banana seedlings in Eastern and central Kenya. CTA and FARA, Agricultural Innovations for Sustainable Development: Contributions from the 3rd Africa-Wide Women and Young Professionals in Science Competitions. Vol. 4 (3): 130-137.
    • Carolyne W. Wangungu, Maina Mwangi, Ruth Gathu, and Reuben Muasya. (2014). Good Orchard Maintenance and Agronomic Practices as Working Components in Management of Dieback Disease on Passion Fruit (Passiflora sp.) in Kenya. Annual Research & Review in Biology. 4(9): 1397-1405.
    • Kahuthia-Gathu R.
    • Kahuthia-Gathu R., Gakunju R., Thungu J. and Okwarah P. (2013). Trends and emerging drugs in Kenya: A case study in Mombasa and Nairobi County. Journal of Applied Biosciences. Pg 5308 – 5325.
    • Ndungu, S. K., I. Macharia, R. Kahuthia-Gathu and R. G. Wahome (2013). Impact of organic vegetable production system in Kiambu and Kajiado Counties of Kenya. Journal of Environmental science and Engineering. 2:256-266.
    • Kahuthia-Gathu R.
    • N Njau, M Mwangi, R Gathu, J Mbaka, and R Muasya (2011). Banana weevil Cosmopolites sordidus reduces availability of corms for seedling production through macropropagation Journal of Animal and Plant Sciences [ISSN 2071-7024] Volume 12 (1), 1537-1542
    • Kahuthia-gathu R., Löhr, B., Poehling H-M. and Mbugua P.K. (2009). Diversity, distribution and role of wild crucifers in major cabbage and kale growing areas of Kenya. Bulletin of Entomological Research. 99 (3), 287-297
    • Kahuthia-gathu R., Löhr, B. and Poehling H-M. (2008). Effect of common wild crucifer species of Kenya on fitness of two exotic diamondback moth parasitoids, Cotesia plutellae and Diadegma semiclausum. Crop Protection. 27 (12), 1477-1484.
    • Gichini, G., Löhr, B., Rossbach, A., Nyambo B. and Gathu, R.
    • Kahuthia-gathu R., Löhr, B. and Poehling H-M (2008). Development and reproductive potential of diamondback moth, Plutella xylostella L. (Lepidoptera: Plutellidae), on cultivated and wild crucifer species in Kenya.  International Journal of Tropical Insect Science. 28,19-29.
    • Kahuthia-gathu R., Löhr, B. and Poehling H-M. (2008). Effect of common wild crucifer species of Kenya on fitness of two exotic diamondback moth parasitoids, Cotesia plutellae and Diadegma semiclausum. Crop Protection. 27 (12), 1477-1484.
    • Löhr, B., Gathu, R., Kariuki, C., Obiero, J. and Gichini, G. (2007). Impact of an exotic parasitoid on Plutella xylostella (Lepidoptera: Plutellidae) population dynamics, damage and indigenous natural enemies in Kenya. Bulletin of Entomological Research. 97, 337-350.
    • Löhr, B. and Gathu, R., (2002). Evidence of adaptation of Diamondback moth, Plutella xylostella (L.), to pea Pisum sativum L. Insect Science and its Application. 22, 161-173.

Books and Books Chapters

  • ·     2012: Kahuthia-Gathu Ruth: Importance of wild crucifers for diamondback moth, Plutella xylostella L. (Lepidoptera: Plutellidae) and its parasitoids in Kenya. LAP LAMBERT Academic Publishing GmbH & Co. Number:  42351 ISBN: 978-3-8465-8231-2


  • ·     NACADA Authority, Gachutha, C., Baya J., Gakunju, R., Gathu, R., Gachika, W., Njoka, C., Njani, E., Murimi, G. (2011). Peer educators training manual on alcohol and drug abuse; response to peer needs. Pg 95.

Last Updated on Tuesday, 05 March 2019 09:52

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