Prof. Ruth Kahuthia Gathu

Title: Prof. Position: Associate Professor  Department: Agricultural Science and Technology(AST) Area of Specialization: Agriculture Entomology Contact Address: P.O. Box 43844, Nairobi 00100 Email: This email address is being protected from spambots. You need JavaScript enabled to view it. Area of Specialisation: Agricultural Entomology  Google Scholar | Orcid ID | Researchgate | Publons View Full CV

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, biological control, pest control.  Sustain biodiversity, address food security and food safety.

Important web links  

• Google Scholar: https://scholar.google.com/citations?user=8nG5b0QAAAAJ&hl=en
• Open Researcher and Contributor ID (Orcid ID):   https://orcid.org/0000-0001-9621-5310
• Research gate: https://researchgate.net/profile/ruth_kahuthia
• Publons: Web of Research ID AAZ-6285-2021: https://publons.com/researcher/4691530/ruth-kahuthia/
• https://loop.frontiersin.org/people/2325145/overview

PUBLICATIONS

Peer-Reviewed Journals

• Fuchaka Waswa, Duncan Gichabe and Ruth Kahuthia-Gathu (2025): Landuse Changes and Implications for food production in peri-urbaan Ruiru Sub-County, Kenya: Journal of Kenya National Commission For UNESCO. https://doi.org/10.62049/jkncu.v512.300
• Oliver Cramswel Genga, Namikoye Everlyne Samita, Ruth Kahuthia-Gathu, and Esther Ndaisi Kioko (2023). Biology of the Endemic Endangered Swallowtail Butterfly, Papilio desmondi teita (Lepidoptera: Papilionidae), on Wild Citrus Species in Taita Hills, Kenya, A Journal of Entomology, 11-14 DOI: 1155/2023/5538627
• Oliver Cramswel Genga, Namikoye Everlyne Samita, Ruth Kahuthia-Gathu, and Esther Ndaisi Kioko (2023). Larval ecology and development of swallowtail butterfly, Papilio nireus (Lepidoptera: Papilionidae) on wild citrus species (Rutaceae) in Kenya. Biologia, 1-18 https://doi.org/10.1007/s11756-023-01491-7
• Kavutu, A.M., Mwangi, M., Kahuthia-Gathu, R. and Wanjohi, W. (2023). Application of antagonistic bacteria in management of crown gall disease (Agrobacterium tumefaciens) on roses in Kenya. Acta Hortic. 1378, 57-62 DOI: https://www.ishs.org/ishs-article/1378_8
  
• Imbayi, B., Kahuthia-Gathu, R. and Mwangi, M. (2023). Effectiveness of pheromone traps in managing fruit flies (Diptera: Tephritidae) on mango (Mangifera indica) and cucurbits in Kenya. Acta Hortic. 1378, 267-274 DOI: 10.17660/ActaHortic.2023.1378.35 https://www.actahort.org/books/1378/1378_35.htm
• Anyanda GN, Bruce AY, Makumbi D, Ahonsi M, Kahuthia-Gathu R, Namikoye ES, Beyene Y and Prasanna BM (2022) Reproductive potential of fall armyworm Spodoptera frugiperda (J.E. Smith) and effects of feeding on diverse maize genotypes under artificial infestation. Front. Insect Sci. 2:950815. https://doi:10.3389/finsc.2022.950815
• Joseph Mulema, Roger Day, Winnie Nunda, Komivi Senyo Akutse, Anani Y. Bruce, Sospeter Gachamba, Solveig Haukeland, Ruth Kahuthia‑Gathu, Staline Kibet, Asenath Koech, Thomas Kosiom, Douglas Watuku Miano, George Momanyi, Lucy Kananu Murungi, James Wanjohi Muthomi, Julianna Mwangi, Maina Mwangi,  Nicholas Mwendo · John Huria Nderitu, Johnson Nyasani, Miriam Otipa, Sarah Wambugu,  Eric Were, Fernadis Makale, Laura Doughty, Steve Edgington, Ivan Rwomushana,  Marc Kenis (2022). Prioritization of invasive alien species with the potential to threaten agriculture and biodiversity in Kenya through horizon scanning. Biol Invasions (2022) 24:2933–2949 https://doi.org/10.1007/s10530-022-02824-4
• Muthoni, Ruth Kahuthia-Gathu, M. Mwangi and J.W. Waceke (2021). Mechanisms of Action of Pseudomonas fluorescens Against Fusarium oxysporum f. sp phaseoli in vitro. Research journali’s Journal of Agriculture 8 (3): 1-13.
• Barasa, M.W., Kahuthia-Gathu, R., Mwangi, M. and Wanjohi, W. (2021). In Vitro Efficacy of Native Entomopathogenic Fungi Against Western Flower Thrips Frankliniella Occidentalis (Pergande) of Tomato in Kenya. International Journal of Innovative Approaches in Agricultural Research, 5(2): 194-202. DOI: 29329/ijiaar.2021.358.4
• Musango, J.K., Kahuthia-Gathu, R. and Waceke, J.W. (2021). Indigenous fungi with antagonistic potential against potato cyst nematodes in Kenya RUFORUM Working Document Series (ISSN 1607-9345), 17 (2): 498-502. Available from http://repository.ruforum.org
• Mulwa J., Kahuthia- Gathu R. and Kasina M. (2020). High Pollinator Diversity and Species Evenness Increases Avocado (Persea Americana) African Journal of Horticultural Science. 17:43-52.
• Sammy Kiprotich Cheruiyot, Ruth Kahuthia-Gathu, Jenard Patrick Mbugi, Elliud Muli, H. Michael and G. Lattorff. (2020). Population abundance of Varroa destructor and its effects on Apis mellifera scutellata colonies in Kenya, Experimental and Applied Acarology, 82(2): 71-184. DOI: 1007/s10493-020-00548-5
• Ofgaa Djirata, Emana Getu and Ruth Kahuthia-Gathu. (2019). A survey of geographical distribution and host range of white mango scale, Aulacaspis tubercularis Newstead (Hemiptera: Diaspididae) in Western Ethiopia Journal of entomology and nematology, 11 (5):59-65. org/10.5897/JEN2019.0228
• Kahuthia-Gathu, R. and Othim, S. T. O. (2019). Effects of two cultivated Brassica sp. on the development and performance of Diadegma semiclausum (Hymenoptera: Ichneumonidae) and Cotesia vestalis (Hymenoptera: Braconidae) parasitizing Plutella xylostella (Lepidoptera: Plutellidae) in Kenya. Journal of Economic Entomology. 112, 2094-2102. https://doi.org/10.1093/jee/toz144
• Joseph Mutunga Mulwa, Ruth Kahuthia Gathu, Nyamai Matolo, Mary Mwari Guantai and John Muo Kasina (2019). Avocado (Persea americana) floral calendar and diurnal visitation rates of its pollinators in Murang’a, Kenya. Journal of Agricultural Research Advances. 01 (1): 23-27.
• W. Barasa, R. Kahuthia-Gathu, M. Mwangi and J. W. Waceke (2019). Tomato Production Characteristics, Biotic Constraints and their Management Practices by Farmers in Bungoma County, Kenya. Journal of Natural Sciences Research. 9 (12); 46-55. DOI: 10.7176/JNSR
• Othim, S.T.O., R. Srinivasan, 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. 1-11 DOI:10.1093/jee/toz165.
• Kahuthia R., Abonyo A. and Imbayi B. (2019). Composition and diversity of xylophagous and predatory beetles in Vachellia xanthophloea (Benth.) P.J.H.Hurter (Fabales: Fabaceae) at Kenyatta University and Mitaboni, Kenya, Journal of Asia-Pacific Biodiversity, https://doi.org/10.1016/j.japb.2019.03.006 .
• Agong, S.O., Kahuthia-Gathu, R., Mwangi, M. & Waceke, J.W. (2018). Evaluation of suppressive potential of selected plant species against Phytophthora infestans in vitro. RUFORUM Working Document Series (ISSN 1607-9345), 17 (2): 447-452. Available from  http://repository.ruforum.org
• Musango, J.K., Kahuthia-Gathu, R. & Waceke, J.W. (2018). Indigenous fungi with antagonistic potential against potato cyst nematodes in Kenya RUFORUM Working Document Series (ISSN 1607-9345), 17 (2): 498-502. Available from http://repository.ruforum.org.
• Stephen T. O. Othim, Srinivasan Ramasamy, Ruth Kahuthia-Gathu, Thomas Dubois, Sunday Ekesi, and Komi K. M. Fiaboe. (2018). 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, 48(1), 163–172. https://doi.org/10.1093/eenvy183
• Stephen T. O. Othim, Srinivasan Ramasamy, Ruth Kahuthia-Gathu, Thomas Dubois, Sunday Ekesi, and Komi K. M. Fiaboe. (2018). Screening for resistance against major lepidopteran and stem weevil pests of amaranth in Tanzania. Euphytica 214:182 https://doi.org/10.1007/s10681-018-2269-1
• Stephen, T.O. Othim, Srinivasan Ramasamy, Ruth Kahuthia-Gathu, Thomas Dubois, Sunday Ekesi and Komi K.M.Fiaboe (2018). Expression of Resistance in Amaranthus (Caryophyllales: Amaranthaceae): Effects of Selected Accessions on the Behaviour and Biology of the Amaranth Leaf-Webber, Spoladea recurvalis (Lepidoptera: Crambidae). Insects, 9(2), 62; https://doi.org/10.3390/insects9020062
• 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. https://doi.org/10.1016/j.japb.2018.03.003.
• 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. https://doi.org/10.1111/jen.12513
• Kahuthia-Gathu, R., Kirubi, D. T., Wangu, L. and Kimani, R. (2018). Bostrichidae Beetles associated with Acacia xanthoploea in Nairobi and Machakos Counties, Kenya.  PloS ONE 13(3): e0188773. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0188773
• Kahuthia-Gathu, R., Kirubi, D. T. and Nangalama D. (2018). Abundance and Distribution of Heterostigmatic Mites Tarsonemus, on Wood-Boring Beetles Recovered from Acacia Xanthophloea in Kenya. Journal of Biodiversity Management & Forestry. 7.1. DOI: 10.4172/2327-4417.1000192
• Sammy Kiprotich Cheruiyot, H. Michael G. Lattorff, Ruth Kahuthia-Gathu, Jenard Patrick Mbugi, and Elliud Muli (2018). Varroa- specific hygienic behaviour of Apis mellifera scutellata in Kenya. Apidologie: 49:439-449. DOI: 1007/s13592-018-0570-6
• T. O. Othim, K. M. Agbodzavu, R. Kahuthia-Gathu, K. S. Akutse, S. Muchemi, S. Ekesi, and K. K. M. Fiaboe (2017). Performance of Apanteles hemara (Hymenoptera: Braconidae) on two Amaranth Leaf-webbers: Spoladea recurvalis and Udea ferrugalis (Lepidoptera: Crambidae). Environmental Entomology, 46(6), 1284–1291. https://doi.org/10.1093/ee/nvx156
• 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. http://www.agropub.com/
• Ofgaa Djirata, Emana Getu and Ruth Kahuthia-Gathu. (2017). Association of a native predator Chilocorus (Coleoptera: Coccinelidae) with a new exotic mango pest, Aulacaspis tubercularis Newstead (Hemiptera: Diaspididae) in Ethiopia. Israel Journal of Entomology, 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: https://doi.org/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 18 (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 6 (7), 87-94.
• K. Muriuki, George Muhia Kariuki, Z. M. Kinyua, R.K. Gathu, D.L. Coyne (2014). Management of Root Knot nematodes-Bacterial wilt Compex using resistant tomato varieties in Coastal Kenya. Journal of Nematology 46(2): 209.
• Njau, N., M. Mwangi, 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 3^rd 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 ) in Kenya. Annual Research & Review in Biology. 4(9): 1397-1405.
• Kahuthia-Gathu R. (2013). Seasonal incidence of Plutella xylostella (Lepidoptera: Plutellidae) and its associated natural enemies in major crucifer growing areas of Kenya. Journal of Plant Breeding and Crop Science. Journal of Plant Breeding and Crop Science; 5 (5), 73-79. https://doi.org/10.5897/JPBCS10.004
• 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, 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.
• Luchidio M.T., Kahuthia-Gathu R. and Gatebe E.1 (2013). Impact of training boda boda operators and safety status in Kakamega County, Kenya. International Journal of Advance Research, IJOAR .org Volume 1, Issue 9, September 2013, Online: ISSN 2320-9151
• Kahuthia-Gathu R. (2011). Seasonal incidence of Plutella xylostella (Lepidoptera: Plutellidae) and its associated natural enemies in major crucifer growing areas of Kenya; Journal of Applied Biosciences 46: 3103– 3112
• 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 Volume 12 (1), 1537-1542. [ISSN 2071-7024]
• 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 DOI: https://doi.org/10.1017/S0007485308006305
• 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. https://doi.org/10.1016/j.cropro.2008.06.003
• Gichini, G., Löhr, B., Rossbach, A., Nyambo B. and Gathu, R. (2008). Can low release numbers of parasitoids lead to establishment? Case of Diadegma semiclausum in East Africa. Crop Protection. 27, 906-914. https://doi.org/10.1016/j.cropro.2007.11.001
• Kahuthia-gathu R., Löhr, B. and Poehling H-M (2008). Development and reproductive potential of diamondback moth, Plutella xylostella (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. doi:10.1016/j.biocontrol.2010.05.019.
• 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. DOI: https://doi.org/10.1017/S0007485307005068
• Löhr, B. and Gathu, R., (2002). Evidence of adaptation of Diamondback moth, Plutella xylostella (L.), to pea Pisum sativum Insect Science and its Application. 22, 161-173. DOI: 10.1017/S1742758400012017

Scholarly books chapters and books Published 

• 2012: Kahuthia-Gathu Ruth: Importance of wild crucifers for diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae) and its parasitoids in Kenya. LAP LAMBERT Academic Publishing GmbH & Co. Number:  42351 ISBN: 978-3-8465-8231-2
• 2011: NACADA Authority, Gachutha, C., Baya J., Gakunju, , 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.

Scholarly Book Chapter

• 2025: Gladys Cheruto, Emmanuely Z. Nungula, Lukelysia Nyawira, Luciana R. Chappa, Ruth Kahuthia-Gathu, Riziki Mwadalu, Jerry C. Dlamini, Shivani Ranjan, Sumit Sow, Sagar Maitra, Jamal Nasar, and Harun I. Gitari (2025). Agroforestry Tree Species: Acacia tortilis, Biology, Importance, Agroforestry Production, and Biotechnology Application. Springer Nature Singapore Pte 145 Ltd. 2025 R. K. Kalia, R. Pathak (eds.), Tree Biology and Biotechnology, https://doi.org/10.1007/978-981-96-0002-1_10

Conference Proceedings

• Malaki p., Lusweti A., Muthama E., Wasonga V., Bwong B., Gathu R., Kirika P., Kioko G., Macharia J., Ngoka B., Namikoye S., Musila S., Nafula L., Kioko E. and Rucina S. eds. (2024)  1^st Joint International Scientific Conference: Utilization Resources for Sustainable, Development, Nature Conservation, and Climate resilience. National Museums of Kenya. ISBN: 9966-955-27-5.

Reviewed Conference Papers

• 2022 ISHS IHC Congress Angers France. A.M. Kavutu, M. Mwangi, R. Kahuthia Gathu and W. Wanjohi, 2022. Application of antagonistic bacteria in management of crown gall disease (Agrobacterium tumefaciens) on roses in Kenya. 
• 2022 ISHS IHC Congress Angers France. B. Imbayi, R. Kahuthia-Gathu and M. Mwangi, 2022. Effectiveness of pheromone traps in managing fruit flies (Diptera: Tephritidae) on mango Mangifera indica and cucurbits in Kenya.
• Genga, O.C, Samita E.N., Kahuthia-Gathu, R. and Kioko E. (2022). Biology of swallowtail butterfly, Papilio nireus (Lepidoptera: Papilionidae) on Wild citrus in Kenya. In book of abstracts for 24th Meeting and Scientific conference of the African Association of Insect Scientists 21st to 25th March 2022, University of Addis Ababa, Addis Ababa, Ethiopia. 47.
• Musango, J. K., Waceke, J. W., Kahuthia-Gathu, R. (2019). Occurrence and Abundance of Plant Parasitic Nematodes on Tree Tomato (So¬lanum Betaceum Cav.) in Kiambu and Embu Coun¬ties. Biennial research and innovation conference, Kenyatta University, Kenya from 23-25th October 2019.
• M.W. Barasa, R. Kahuthia-Gathu, M. Mwangi and J. W. Waceke (2019). Management of insect pests of tomato using indigenous antagonistic fungi in Kenya. Biennial research and innovation conference, Kenyatta University, Kenya from 23-25th October 2019
• Agong, S. O., Mwangi, M., Kahuthia-Gathu, R. and Waceke J. W. (2019). Influence of Potato Production Practices of the Oc­currence of Potato Late Blight. Kenyatta University Biennial research and innovation conference 23-25^th October 2019, Kenyatta University, Kenya
• Kavutu, A. M., Mwangi, M., Ka­huthia-Gathu, R. and Waceke J. W. (2019). Biocontrol Potential of An­tagonistic Bacteria Against Agrobacte­rium Tumefaciens on Roses in Kiambu County, Kenya. Kenyatta University Biennial research and innovation conference 23-25^th October 2019, Kenyatta University, Kenya
• Imbayi B., Kahuth­ia-Gathu, R., and Mwangi M. (2019). Use of Pher­omone Traps in the Management of Fruit Flies (Diptera: Tephritidae) on Mangoes Mangifera Indica in Central Kenya. Kenyatta University Biennial research and innovation conference 23-25^th October 2019, Kenyatta University, Kenya
• Imbayi B., Ignatius Stella, Kahuth­ia-Gathu, R., and Mwangi M. (2019). Pesticide Use Practices In Horti­cultural Crops Pro­duction In Central Kenya. Kenyatta University Biennial research and innovation conference 23-25^th October 2019, Kenyatta University, Kenya
• W. Barasa, R. Kahuthia-Gathu, M. Mwangi and J. W. Waceke. (2019). Management of insect pests of tomato using indigenous antagonistic fungi in Kenya. Kenyatta University Biennial research and innovation conference 23-25^th October 2019, Kenyatta University, Kenya
• Barasa, W. M., Kahuthia-Gathu, Maina, M. and J.W.Waceke. (2019). Efficacy of indigeneous antagonistic fungi in management of Frankliniella occidentalis on tomato in Kenya. Contributed presentation during the 1st International Conference on Agroecology Transforming Agriculture and Food Systems in Africa. 18th-20th June, 2019. Safari Park Hotel & Casino, Nairobi, Kenya.
• Barasa, W. M., Kahuthia-Gathu, Maina, M. and J.W.Waceke. (2018). Occurrence of arthropod pests and their management by tomato farmers in Bungoma County, Kenya. Contributed presentation during the 18th Workshop on Sustainable horticultural production in the tropics. 26th-30th November, 2018. Taita Taveta University, Voi, Kenya.
• Barasa, W. M., Kahuthia-Gathu, Maina, M. and J.W.Waceke. (2018). Efficacy of entomopathogenic fungi in the control of Western flower thrips Frankliniella occidentalis in Kenya. Contributed presentation during the RUFORUM Biennial Conference. 22nd-26^th October, 2018. Kenyatta International and Convention Centre (KICC), Nairobi, Kenya.
• Barasa, W. M., Kahuthia-Gathu, Maina, M. and J.W.Waceke. (2018). Assessment of pests’ incidence, pesticide use and application practices on tomato production in Bungoma County, Kenya. Contributed presentation during the 2nd International Phytosanitary Conference. 4th-8th June, 2018. KEPHIS Headquarters, Nairobi, Kenya.
• Okwarah, P., R. Gakunju, R. Kahuthia, and J. Thungu (2017). Emerging drugs of abuse: Current perspective on substituted opiates, nicotine, cannabinoids and cathinone among the urban populations in Kenya. At the NIDA International Forum at Montreal Canada, in June 2017
• Kahuthia-Gathu R., Thungu, K.D., Kimani, R. and Wangu, L. (2016). Bostrichidae beetles associated with Acacia xanthophloea at Kenyatta University and Mitaboni in Nairobi and Machakos Counties, Kenya: 2^nd biennial international conference held on 29^th Nov- 2^nd December 2016 at the Business and Student’s Services Centre (BSC) Kenyatta University
• Kahuthia-Gathu, R. and Thungu, K.D. (2016): Families of powderpost beetles and their associated natural enemies on Acacia xanthophloea in Machakos and Nairobi Counties, Kenya – 16^th Workshop on Sustainable Horticultural Production In The Tropics, Held on 28^th November – 2nd December 2016 at Chuka University, Chuka – Kenya.
• Tarmogin, S. O., Komi, F. and Kahuthia-Gathu, R. (2016). Seasonal Abundance of Amaranth Lepidopteran Defoliators and the Role of Indigenous Parasitoids and Phenylacetaldehyde in their Control in Nairobi County, Kenya 2^nd biennial international conference held on 29^th Nov- 2^nd December 2016 at the Business and Student’s Services Centre (BSC) Kenyatta University
• Mwangi, G.I., Solveigh, and Kahuthia-Gathu R. (2016). Evaluating the potential of entomopathogenic nematode isolates in the management of fruit fly species in Nairobi County: 2^nd biennial international conference held on 29^th Nov- 2^nd December 2016 at the Business and Student’s Services Centre (BSC) Kenyatta University
• Kariuki, A.N. and Kahuthia-Gathu, R. (2015). Evaluation of tomato leaf extract in management of cabbage aphid Brevicoryne brassica on kale in Nairobi County. 15^th Workshop on Sustainable Horticultural Production in the Tropics. held on 1-4th Dec 2015 at Kenya Agricultural Research and Livestock Organization (KARLO), Kandara Center & Horticultural Research Institute (HRI), Murang’a County- Kenya
• Omburo Stephen Tarmogin, Kahuthia-Gathu R and Fiaboe Komi (2015). "Performance of Apanteles hemara Nixon (Hymenoptera: Braconidae) on Spoladea recurvalis F and Udea ferrugalis Hubner (Lepidoptera: Pyralidae). 31^st Conference of the Association of African Insect Scientist (AAIS) held in Cotonou, Benin from 19th-23rd October, 2015
• Kahuthia-Gathu R., Nyambo B. and Subramanian (2013). Impact of introduced parasitoid Cotesia plutellae on Plutella xylostella and its parasitoid guild on kale in semi-arid areas in Kenya. 11^th African Crop science society conference in Entebbe, Uganda; from14-17 October 2013.
• K. Ndungu, I Macharia, R. Kahuthis-Gathu and R. Githaiga Wahome. (2013). Impact of organic vegetable production system in Kiambu and Kajiado Counties of Kenya. 11^th African Crop science society conference in Entebbe, Uganda; from14-17 October 2013.
• Kahuthia-Gathu R., Nyambo B. and Subramanian (2013). Spread and establishment of exotic parasitoid Cotesia plutellae on diamondback moth and parasitoid guild on kale in Semi-arid areas of Kenya Mount Kenya University, 1^st International Research & Innovation Conference at Safari Park Hotel From 28^th -30^th Aug 2013.
• Luchidio M. T., Kahuthia-Gathu R. and Gatebe (2013). Impact of training boda boda operators and safety status in Kakamega County, Kenya Mount Kenya University 1^st International Research & Innovation Conference at Safari Park Hotel from 28^th -30^th Aug 2013
• Kahuthia-Gathu R., Gakunju R., Okwarah P., and Thungu J. (2013). The Trends and patterns of Emerging in Kenya. 2^nd National Conference on Alcohol and Drug Abuse. Theme: The Youth and Drugs: A Call for action: at Moi International Sports Centre Kasarani Gymnasium on 10^th -13^th June 2013.
• Ndungu, SK., Macharia, I. and Kahuthia-Gathu R. (2013). Analysis of profitability of organic vegetable production system in Kiambu Counties of Kenya. African Crop Science Conference Proceedings 11, 605-611
• Wangungu, C.W., Mwangi, M., Gathu, R. K. Muasya, R. and Mbaka, J. (2012). Diversity of pathogens and symptoms associated with dieback on passion fruit in Kenya. Third RUFORUM Biennial Meeting 24 – 28^th September 2012, Entebbe, Uganda. 1673-1677
• Kahuthia-Gathu R and Maina Mwangi (2011). Studies on insect pests and diseases of chayote, Sechium edule (swartz.) In Kenya aGRO 2011 Biennial Conference ‘Optimization Of Agricultural Value Chains For Sustainable Development’26^th  – 28th September 2011
• Kahuthia-Gathu Ruth. (2011). Seasonal incidence of Plutella xylostella Lepidoptera: Plutellidae) and its associated natural enemies in major crucifer growing areas of Kenya. 4th International e-Conference on Agricultural Biosciences.
• W. Wangungu, M. Mwangi, R. Gathu, R. Muasya, J. Mbaka, & N. Kori. (2011). Reducing dieback disease incidence of passion fruit in Kenya through management practices; African Crop Science Conference Proceedings, Vol. 10. pp. 1  - 4
• Carolyne W. Wangungu, Ruth Kahuthia-Gathu and Maina Mwangi, (2010). Studies on the die back disease of passion fruit in major production areas in Kenya Proceedings of the 3rd International e-Conference on Agricultural BioSciences Page: 68 – 69.
• Njeri Njau, Maina Mwangi and Ruth Kahuthia-Gathu (2010). Evaluating health of macropropagated banana seedlings. Proceedings of the 3^rd International e-Conference on Agricultural BioSciences. Page: 64 – 65.
• Wangungu C.W., Maina. M, Gathu R. K., Mbaka, J., and Kori J. N., (2010). Passion fruit production in Kenya: Opportunities and constraints. Contributions of Agricultural Sciences towards achieving the Millenium Development Goals pg. 55- 63.
• Wangungu, C.W., Mwangi, M., Mbaka, J., Kori, N. and Gathu, R., (2010). Studies on the etiology, epidemiology and management of dieback disease of passion fruit in Kenya. Second RUFORUM Biennial Meeting 20 - 24 September 2010, Entebbe, Uganda
• Wangungu, C.W., Mwangi, M., Mbaka, J., Kori, N. and Gathu, R., (2010). Biotic constraints to passion fruit production in central and eastern provinces of Kenya. Second RUFORUM Biennial Meeting 20 - 24 September 2010, Entebbe, Uganda. Pg 239-241
• Njau N. Maina M., Gathu R. K., Mbaka J. and Muasya R. (2010). Propagation of healthy banana seedlings in relation to pest and disease management. Contribution of Agricultural Sciences towards achieving the Millennium Development Goals Pg. 75 -86.
• Kahuthia-Gathu Ruth (2006): Diversity, distribution and role of wild crucifers in major cabbage and kale growing areas of Kenya at the 5^th International DBM Workshop in 24-28^th October 2006: in Beijing, China

Non-reviewed Conference Papers

• Murema et al., (2021). Prioritization of Invasive Alien Species With Potential to Threaten Agriculture And Biodiversity in Kenya Through Horizon Scanning,
• Agong, S. O., Mwangi, M., Kahuthia-Gathu, R. and Waceke J. W. (2019). Influence of Potato Production Practices of the Oc­currence of Potato Late Blight. Kenyatta University Biennial research and innovation conference 23-25^th October 2019, Kenyatta University, Kenya
• Kavutu, A. M., Mwangi, M., Ka­huthia-Gathu, R. and Waceke J. W. (2019). Biocontrol Potential of An­tagonistic Bacteria Against Agrobacte­rium Tumefaciens on Roses in Kiambu County, Kenya. Kenyatta University Biennial research and innovation conference 23-25^th October 2019, Kenyatta University, Kenya
• Imbayi B., Kahuth­ia-Gathu, R., and Mwangi M. (2019). Use of Pher­omone Traps in the Management of Fruit Flies (Diptera: Tephritidae) on Mangoes Mangifera Indica in Central Kenya. Kenyatta University Biennial research and innovation conference 23-25^th October 2019, Kenyatta University, Kenya
• Imbayi B., Ignatius Stella, Kahuth­ia-Gathu, R., and Mwangi M. (2019). Pesticide Use Practices In Horti­cultural Crops Pro­duction In Central Kenya. Kenyatta University Biennial research and innovation conference 23-25^th October 2019, Kenyatta University, Kenya
• W. Barasa, R. Kahuthia-Gathu, M. Mwangi and J. W. Waceke. (2019). Management of insect pests of tomato using indigenous antagonistic fungi in Kenya. Kenyatta University Biennial research and innovation conference 23-25^th October 2019, Kenyatta University, Kenya
•  Kahuthia-Gathu, R., Kirubi, D. T., Wangu, L. and Kimani R (2016) Bostrichidae beetles associated with Acacia xanthoploea at Kenyatta University and Mitaboni in Nairobi and Machakos Counties, Kenya. Proceedngs Of The 2nd Biennial International Conference On Enhancing Sustainabale Agricultural Production And Marketing Systems Through Science, Technology And Innovations. Pg 133-151
• Mulwa J, R Gathu and M Kasina (2016). Avocado (Persea americana) yield as influenced by pollinators in Kandara, Murang’a County, Kenya. Proceedngs Of The 2nd Biennial International Conference On Enhancing Sustainabale Agricultural Production And Marketing Systems Through Science, Technology And Innovations, Pg. 336-339. 

Scholarly Presentations as Conference/Workshops/Seminars

• June 2024: Ruth Kahuthia-Gathu. Presented Country report on Challenges facing Crop production in Kenya. Theme: “Driving Financial Inclusion Through a Policy Framework for Healthy and Sustainable Food Systems in Kenya”. Organized by Korea International Cooperation Agency (KOICA) in South Korea from 5^th -18^th June 2024
• O.I. Omboye, M. Mwangi, R. Kahuthia- Gathu and V. Wekesa. (2024). Root rot remain a severe constraint of bean production in soilless culture. 1^st Joint International Scientific Conference: Utilization Resources for Sustainable, Development, Nature Conservation, and Climate resilience from 3^rd to 5^th June 2024 at the National Museums of Kenya. Page 181.  
• Mulwa J., Samita E.N., Gathu R.K., Wasilwa L., Wesonga G., Guantai M., Muchemi S., Matolo N., Jeong I., Lee G. and Kasina M. (2024) Effectiveness of mating disruption technology in the management of Fall armyworm (S. frugiperda) infesting small holder farms in Masii, Machakos County. 1^st Joint International Scientific Conference: Utilization Resources for Sustainable, Development, Nature Conservation, and Climate resilience from 3^rd to 5^th June 2024 at the National Museums of Kenya. Page 184.  
• Anyanda G.N., Anani, Y. Bruce, Dan Makumbi, Kahuthia-Gathu R., Namikoye E.S., and Prasanna B.M. (2024) Breeding for native genetic resistance to fall armyworm Spodoptera frugiperda (J.E. Smith) in late maturing tropical maize germplasm. 1^st Joint International Scientific Conference: Utilization Resources for Sustainable, Development, Nature Conservation, and Climate resilience from 3^rd to 5^th June 2024 at the National Museums of Kenya. Page 186.  
• Oliver C. Genga, E. Namikoye Samita, Ruth Kahuthia-Gathu and Esther N. Kioko (2024). Oviposition preference of endangered swallowtail butterfly, Papilio desmondi teita (Lepidoptera: Papilionidae) endemic to Taita hills on wild citrus species in Kenya. 1^st Joint International Scientific Conference: Utilization Resources for Sustainable, Development, Nature Conservation, and Climate resilience from 3^rd to 5^th June 2024 at the National Museums of Kenya. Page 190.  
• Oct 2023- Ruth Kahuthia-Gathu Presented “Country report on Mitigation of Post-Harvest Losses of Maize in Kenya. Theme: “Driving Financial Inclusion Through a Policy Framework for Healthy and Sustainable Food Systems in Kenya”. Organised by Korea International Cooperation Agency (KOICA) in South Korea from 12^th -24^th Oct 2023
• Ruth Kahuthia-Gathu and Maina Mwangi (2018. Impact of Cotesia Plutellae in the Management of Plutella Xylostella on Kale in Kenya. Global food security and food safety: The role of universities” Tropentag, September 17-19, 2018, Ghent, Germany – abstract.
• Othim, S.T.O., R. Kahuthia-Gathu, S. Ramasamy, T. Dubois, S. Ekesi, K.K.M. Fiaboe (2018). Screening for resistance in amaranths against Spoladea recurvalis and amaranth stem weevils in Arusha, Tanzania. University seminar, Kenyatta University 16th January 2018.
• Othim, S.T.O., R. Kahuthia-Gathu, S. Ekesi, K.K.M. Fiaboe (2017). Effect of Phenylactaldehyde (PAA) attractant and selected amaranth lines on the populations and damage caused by amaranth lepidopteran defoliators in Central, Kenya. AIV-IPM end of project Workshop 12–14th December, Arusha, Tanzania.
• Othim, S.T.O., R. Kahuthia-Gathu, S. Ramasamy, T. Dubois, S. Ekesi, K.K.M. Fiaboe (2017). Performance of Apanteles hemara on Spoladea recurvalis in Kenya and on selected resistant amaranth accessions in Tanzania. AIV-IPM end of project Workshop 12–14th December, Arusha, Tanzania.
• Othim, S.T.O., R. Kahuthia-Gathu, K.K.M. Fiaboe (2016). Population dynamics of amaranth lepidopteran leaf webbers and the role of local parasitoids in their control in Nairobi County, Kenya. Kenyatta University seminar, 8^th April 2016. Kenyatta University, Kenya.
• Othim, S.T.O., R. Kahuthia-Gathu, K.K.M. Fiaboe (2016). Seasonal abundance of amaranth lepidopteran defoliators and the role of indigenous parasitoids and Phenylacetaldehyde in their control in Nairobi County, Kenya. Kenyatta University School of Agriculture Second Biennial International Conference, 29th November -2nd December 2016.
• Kahuthia-Gathu R. (2016). Families of Powderpost beetles and their associated natural enemies on Acacia xanthoploea in machakos and Nairobi Counties, Kenya. 16^th Workshop on Sustainable Horticultural Production in the Tropics at Chuka University, Chuka, Kenya. 28^th Nov- 2^nd December 2016.
• Kahuthia-Gathu R. (2016). Assessing and enhancing impact of Cotesia vestalis in the management of diamond back moth Plutella xylostella on kales in semi-arid areas of Kenya. 5^th National Science Week at KICC Nairobi Kenya. 16^th 20^th   May, 2016.
•  Othim, S.T.O., R. Kahuthia-Gathu, K.S. Akutse, K.K.M. Fiaboe (2015). Performance of Apanteles hemara Nixon (Hymenoptera: Braconidae) on Spoladea recurvalis F. and Udea ferrugalis Hubner (Lepidoptera: Pyralidae). Presented at the 21 st Meeting and Conference of the Association of African Insect Scientists (AAIS), 19-23 October 2015 in Cotonou, Benin.
• Nyambura, A. and Kahuthia-Gathu, R. (2015). Evaluation of tomato leaf extract in management of cabbage aphid Brevicoryne brassica on kale in Nairobi County. 15^th Workshop on Sustainable Horticultural Production in the Tropics at Kenya Agricultural Research and Livestock Organization (KARLO), Kandara Center & Horticultural Research Institute (HRI), Murang’a County- Kenya from 1^st -4^th Dec 2015.
• Kahuthia-Gathu R. (2015). Current research work on tomato leaf miner Tuta absoluta. Inception of the Tomato ARF Project at the at Jacaranda Hotel, Westlands, Nairobi County, Kenya. 11^th September 2015.
• Kahuthia-Gathu R., Nyambo B, Subramanian S. (2014). Impact of introduced parasitoid Cotesia vestalis on Plutella xylostella and its parasitoid guild on kale in semi-arid areas in Kenya. International Conference on Building a New Generation of Agricultural Scientists. Kenyatta University, Nairobi, Kenya. 1 – 5, Dec 2014.
• Ndalo, V.O., Kahuthia-Gathu, R., Maina, M (2015). Chemical Management of Tuta absoluta (Meyreck) in Loitokitok, Kajiado County, Kenya. Page 41 - Horticultural Association of Kenya annual symposium 2015. 15th workshop on sustainable horticultural production in the tropics. Held at KALRO, Thika, Dec 2015. In Book of Abstracts-
• Muriuki L.M., G.M. Kariuki, Z.M. Kinyua, R. Gathu, D.L. Coyne (2014). Evaluation of Tomato Cultivars for Resistance to Bacterial Wilt-root Knot Nematode Disease Complex in Kenya. International Conference on Building a New Generation of Agricultural Scientists. Kenyatta University, Nairobi, Kenya. 1 – 5, Dec 2014.
• Ndalo Victor, Gathu-Kahuthia, R and Mwangi Maina, (2014). Population Dynamics and Indigenous Parasitoid Guild of Tomato Leaf Miner (Tuta Absoluta) in Loitoktok, Kajiado County Kenya. AGRSC Book of Abstracts Page 131. International Conference on Building a New Generation of Agricultural Scientists. Kenyatta University, Nairobi, Kenya. 1 – 5, Dec 2014.
• Namikoye     E. S., M. Kasina, M.W. Githendu, G. kariuki, R.K. Gathu, Z.M. Kinyua (2014). Population Dynamics and Management of Frankliniella williamsi (Thysanoptera: Thripidae) vector of maize chlorotic mottle virus. International Conference on Building a New Generation of Agricultural Scientists. Kenyatta University, Nairobi, Kenya. 1 – 5, Dec 2014.
• J.R. M. Nyange, Z. Ng`anga` and R. Kahuthia-Gathu (2014). Latex Glove Allergy Amongst Health Care Workers in Thika District Level V Hospital, Kenya. 8th Egerton University International Conference Theme: Innovative Research and Technology for Global Development, 6^th - 28^th March, 2014
• Ruth Kahuthia-Gathu (2013). Impact of introduced parasitoid Cotesia plutellae on Plutella xylostella and its parasitoid guild on kale in semi-arid areas in Kenya. 11^th African Crop science society conference in Entebbe, Uganda from 14-17 October 2013.
• S.K. Ndungu, I Macharia, R. Kahuthia-Gathu, R. Githaiga Wahome (2013). Impact of organic vegetable production system in Kiambu and Kajiado Counties of Kenya. 11^th African Crop science society conference in Entebbe, Uganda from 14-17 October 2013.
• Ruth Kahuthia-Gathu (2013). Spread and establishment of exotic parasitoid Cotesia plutellae on diamondback moth and parasitoid guild on kale in Semi-arid areas of Kenya. Mount Kenya University1^st International Research & Innovation Conference at Safari park Hotel, Nairobi 28^th -30^th Aug 2013
• Luchidio M. T. and R. Kahuthia-Gathu (2013). Impact of training boda boda operators and safety status in Kakamega County, Kenya. Mount Kenya University 1^st International Research & Innovation Conference at Safari park Hotel, Nairobi 28^th -30^th Aug 2013
• Ruth Kahuthia-Gathu, (2013). Trends and patterns of Emerging drugs in Kenya. A case study in Nairobi and Mombasa County. 2^nd National Conference on Alcohol and Drug Abuse. Nairobi, Kenya from 10^th -13^th June 2013.
• Ruth Kahuthia-Gathu (2011). Insect pests and Diseases of Sechium edule in Kenya. Agro 2011 Biennial conference “Optimisation of agricultural value chains for sustainable development. UON Kenya. 26^th -28^th Sept 2011 Poster Presentation
• Carol Wangari Wangungu Maina Mwangi, Mbaka, J., Kori, N. & Gathu, R.. (2011). Studies on complexity of the dieback disease of passion fruit in Kenya. 4th Int. e-Conference on Agricultural Biosciences. Held online Aug 2011.  http://www.m.elewa.org/IeCAB-Abstracts-2011/IeCAB011-413.pdf
• Njeri Njau, Maina Mwangi, Ruth Gathu, Reuben Muasya, Jesca Mbaka, (2011). Assessing macropropagation technique for production of healthy banana seedlings. Proceedings of the 10th African Crop Science Conference 10th – 13th October 2011, Maputo, Moz. Pg. 248 – 249. www.acss2011moz.uem.mz/.../Volume%20of%20Abstracts%20&...
• Njeri Njau, Maina Mwangi, Mbaka, J., Gathu, R, & Muasya, R. (2010). Biotic constraints to banana production in Eastern and Central Provinces of Kenya. Proceedings of the Second RUFORUM Biennial Meeting 20 - 24 September 2010, Entebbe, Uganda. Pp 267 – 269. http://mak.ac.ug/documents/RUFORUM/NjeriBiotic.pdf
• Wangungu, C.W., Maina Mwangi, Mbaka, J., Kori, N. & Gathu, R.. (2010). Biotic constraints to passion fruit production in central and eastern provinces of Kenya. Proceedings of the Second RUFORUM Biennial Meeting 20 - 24 September 2010, Entebbe, Uganda. Pp 239 – 241. www.mak.ac.ug/documents/RUFORUM/WangunguBiotic.pdf
• Wangungu, C.W., Maina Mwangi, Mbaka, J., Kori, N. & Gathu, R.. (2010). Studies on the etiology, epidemiology and management of dieback disease of passion fruit in Kenya. Proceedings of the Second RUFORUM Biennial Meeting 20 - 24 September 2010, Entebbe, Uganda. Pp 303 – 305. http://mak.ac.ug/documents/RUFORUM/WangungaStudies.pdf
•  Njeri Njau, Mwangi, M., Gathu, R., Mbaka, J., Kori, N. & Muasya, R. 2010. Assessing effectiveness of macropropagation technology to produce healthy seedlings Mwangi Maina CV, Page 19 of 25 19 of banana varieties with high market demand in Eastern and Central provinces, Kenya. Proceedings of the Second RUFORUM Biennial Meeting 20 - 24 September 2010, Entebbe, Uganda. Pp 531 – 533. http://mak.ac.ug/documents/RUFORUM/NjeriAssessing.pdf

Professional Affiliation & Portfolios

• International Journal of Tropical Insect Science – part of the consortium as manuscript reviewer and editorial team
• Ministry of Agriculture and Livestock Development (MOALD)- Jan 2024. Participated in the development of the Mango Value change Development Strategy
• Korea Cooperative Agency (KOICA) 2022- Sept- Oct 2023- Participated in Country and Invitational Program to South Korea on “Driving Financial Inclusion Through a Policy Framework for Healthy and Sustainable Food Systems in Kenya”
• Ministry of Agriculture and Livestock Development (MOALD)- 2023- Participated in the development of contingency plans workshop invitation for migratory pests Quelea quelea birds and fall army worms/African army worms in Kenya
• Ministry of Agriculture and Livestock Development (MOALD)- August 2023 participated on integrated multi-pest monitoring and reporting tool
• CABI- 2018- Participated in Prioritization of Invasive Alien Species with potential to threaten agriculture and biodiversity in Kenya through horizon scanning
• CABI- reviewing of their manuscripts

Recognition, Awards and Honours

• Among top best 100 (Position 87) KU researchers publishing by Elsevier
• 2011-2012: Position two (2) lecturer in performance contract of Kenyatta University
• 2002: Staff of the year at International Centre of Insect Physiology and Ecology (ICIPE) for Outstanding performance in the Diamondback moth Project/Plant Health Division,
• 1996: Exemplary and outstanding performance in Biology, KCSE Exam at Kanunga High School
• May 2004: Awarded a Doctorate Scholarship by BMZ Germany through in International Centre of Insect Physiology and Ecology (ICIPE)
• May 1997: awarded a Masters Scholarship by International Centre of Insect Physiology and Ecology (ICIPE)

OTHERS

Participation in workshops/conferences from 2006 to date

• 21st- 23rd Feb 2023. Participated in the workshop on Universities Promoting Linkages for Impactful Training, Innovation and Technology Transfer in Agriculture (UPLIFT-ag) at Maxland Hotel Juja Kenya.
• 28^th Sept- 6^th Oct 2022: Participated in online training on Driving Financial Inclusion Through a Policy Framework for Healthy and Sustainable Food Systems in Kenya-Country Specific Program by Korea International Cooperation Agency (KOICA)

• 23^rd-25^th Oct 2019: Participated in the Biennial Research and Innovation Conference, Theme Research and Innovation for the achievable of the sustainable goals and Kenya’s big four Agenda, at Kenyatta University, Kenya
• 3^rd – 4^th Dec 2018: attended a follow up Horizon Scanning Workshop in Nairobi organized by CABI
• 13^th – 14th June 2018: attended Horizon Scanning Workshop in Nairobi organized by CABI
• 28^th Nov- 2^nd Dec 2016: Presented a paper titled “Families of Powderpost beetles and their associated natural enemies on Acacia xanthoploea in machakos and Nairobi Counties, Kenya” in the 16^th Workshop on Sustainable Horticultural Production in the Tropics at Chuka University, Chuka, Kenya
• 29^th Nov- 2^nd Dec 2016: Participated in the 2^nd SAED Biennial International Conference at Business and Student’s Services Centre (BSSC) Kenyatta University
• 16^th – 20^th May 2016: Participated in the 5^th National Science Week organized by The National Commission For Science, Technology And Innovation: THEME; Research, Technology and Innovation for Sustainable Industrial Development, at Kenyatta International Convention Centre (KICC).
• 1-4th Dec 2015 participated on 15^th Workshop on Sustainable Horticultural Production in the Tropics. at Kenya Agricultural Research and Livestock Organization (KARLO), Kandara Center & Horticultural Research Institute (HRI), Murang’a County- Kenya
• 10^th Oct 2015: Training Programme for Curriculum Development and Review- Center For Teaching Excellence and Research Training, Kenyatta University
• 11^th Sept 2015: Facilitated and participated at the Tomato ARF Project inception workshop: Salvaging tomato production in Kenya. Theme: Towards adoption of Integrated Pest management (IPM) Packages for sustainable management of Tomato leafminer Tuta absoluta and Fusarium wilt-nematode complex. Venue: Jakaranda Hotel, Westlands, Nairobi.
• 30^th -31^st July 2015: Participated in the 2^nd Africa Ecosystem Based Adaptation for food security Conference 2015. Theme Re-imagining Africa Food Security through Harnessing Ecosystem based Adaptation (EBA) Approaches Now and Into the Future under Climate Change in United Nations Environmental Program
• 14^th -15^th July 2015: participated in Curriculum review for the Department of Agriculture resource management at Kenyatta University
• 1^st – 5^th Dec 2014: Participated in the International Conference on Building a New Generation Of Agricultural Scientists. Theme: Bridging The Gap Between Society, Science and Industry at Kenyatta University.
• 14^th July 2014: Participated in the National Stakeholders Symposium on Tuta absoluta conducted at KARI Headquarters Nairobi. Theme: Mitigating the challenges of the American Tomato leaf miner.
• 26th - 28th March, 2014 Participated in the 8th Egerton University International Conference Theme: Innovative Research and Technology for Global Development
• 13- 15^th Jan 2014. Participated in Kenyatta University- AGRA- Wagenigen UR Workshop on Competence and Skills training for PhD supervisors and Established Scientists Theme: Rise to the Challenge
• 3-6^th Dec 2013: Participated in the 13^th WORKSHOP on Sustainable horticultural products in the tropics at Meru University of Science and Technology (MUST), Kenya.   
• 14-17^th Oct 2013. Impact of introduced parasitoid Cotesia plutellae on Plutella xylostella and its parasitoid guild on kale in semi-arid areas in Kenya. 11^th African Crop science society conference in Entebbe, Uganda
• 28^th – 30^th Aug 2013: Chaired and facilitated in the 1^st International Research and Innovation Conference “towards achieving a knowledge economy through research and innovation” organised by Mount Kenya University (MKU) at Safari Park Hotel, Nairobi
• 20^th – 21^st Aug 2013: participated in the 1^st African Food Security Conference: harnessing Ecosystem based Approaches for Food security and Adaptation to Climate Change, at UNEP, Nairobi, Kenya
• 10^th -13^th June 2013: Chaired and Facilitated in the 2^nd National Conference on Alcohol and Drug Abuse. Theme: The Youth and Drugs: A Call for action: at Moi International Sports Centre Kasarani Gymnasium
• 25^th – 26^th April 2013: Participated in the Conference on trends and opportunities in the production and processing and consumption of Staple Crops in Kenya organised by KIRDI at Intercontinental Hotel, Nairobi
• 25^th- 27^th Jan 2012: Participated in 1^st National Conference on Alcohol and Drug Abuse organised by NACADA at KIA
• 11^th – 15^th April 2011: Facilitated in a workshop for Agricultural Radio interns organised by Kenyatta University and farmer Voice radio (FVR) Initiative in KU
• 8^th -11^th Aug 2010: Participated in curriculum development workshop at Crayfish Lodge, Naivasha
• 29^th – 30^th June 2009: Participated in training workshop for members of School Curriculum committees on Gender Mainstreaming
• 28^th April- 3^rd May 2008: Attended and Participated the Women Organizing Change in Agriculture and Natural Resource Management (WOCAN) Regional Meeting of Members of Eastern and Southern Africa in Kampala, Uganda.
• 8-10^th Aug 2006: Participated in 2^nd National Biological Postgraduate Scientific Conference, Kenyatta University
• 24-28^th Octr 2006: Participated at the 5^th International DBM Workshop in Beijing, China
• 5-10^th March 2000: Training of Diamondback Moth (DBM) Workshop for East and South Africa participants, on field surveys, use of questionnaire and processing of materials.
• 14-16^th Jan-1999: Attended the 2^nd National Horticulture Workshop on the way forward for horticulture towards Kenya’s industrialization at Jomo Kenyatta University of Agriculture and Technology (JKUAT).

Conferences/ workshop/ convened or organized

• 23-25^th October 2019: Chaired a plenary session in the Biennial Research and Innovation Conference, Theme Research and Innovation for the achievable of the sustainable goals and Kenya’s big four Agenda, at Kenyatta University, Kenya
• May – December 2016: Participated as a sub-committee Chairperson in the organisation, and facilitated in the 2^nd SAED International Conference on Building a New Generation of Agricultural Scientists at Kenyatta University, Nairobi.
• November 2016: participated as a Participated as a sub-committee Chairperson in the organisation, and facilitated in the SAED 1^st Biennial International Conference on. Theme: at Kenyatta University, Nairobi.
• 11^th September 2015: Convened and gave a presentation on ‘Current research work on tomato leaf miner Tuta absoluta’ at the Inception of the Tomato ARF Project at Jacaranda Hotel, Westlands, Nairobi County
• 1^st – 5^th December 2014: Participated as a sub-committee Chairperson in the organisation, and facilitated in the International Conference on Building a New Generation of Agricultural Scientists. Theme: Bridging The Gap Between Society, Science and Industry at Kenyatta University, Nairobi.
• May 2012: Convened and coordinated 5-day workshop on peer educators training workshop for state house staff at Kenya Institute of Education (KIE), Nairobi.
• 24^th to 28^th may 2010: Coordinated five (5) day workshop for the Ministry of Higher Education, Science and Technology (MoHEST) training workshop for trainer of trainers on Government mainstreaming, stress, and alcohol and drug abuse at AICAD, JKUAT.
• 2002-2003: Organised and coordinated training of Trainer of Trainers (TOT) workshop in Kenya, Uganda and Tanzania for the Diamondback Moth (DBM) Bio-control Project for Eastern and Southern Africa.

Short Communication in Journals

• Ruth Kahuthia, Andrew Abonyo, Vladimir Sakalian and Georgi Georgiev. (2021). New and interesting records of jewel beetles (Coleoptera: Buprestidae) from Kenya Acta Zoologica Bulgarica 73 (2) http://www.acta-zoologica-bulgarica.eu/2021/002431

Consultancy and Project Reports

• July 2025: participated in the review of the Food Systems Resilience Project(FSRP) DAT manual organized my the Ministry of Agriculture
• May 2024: Participated in the Development of an Integrated Pest Management (IPM) Curriculum in collaboration with CABI
• May 2024: Participated in the development of the Contingency plan (CP) for the Desert Locust a transboundary pest.
• March 2024: Participated in the validation of the Multi-Pest Surveillance tool in conjunction with Ministry of Agriculture and Livestock (MOAL) and Regional Centre for Mapping of Resources for Development (RCMRD)
• January 2024: Development of the Mango Value Chain Strategy for Kenya
• May-Dec 2023 Participated in the development of the Contingency plan (CP) for the migratory pests African armyworm and Quelea quelea birds
• June 2019: Consultant in the review of Vice-chancellor’s research grant proposals for Embu University
• June 2013: Team leader- Conducted a follow-up survey on the prevalence of alcohol and drug abuse for Kenya National Examination Council (KNEC)
• 2013: Principal investigator on Study on emerging drugs in Nairobi and Mombasa Counties in Kenya. funded by NACADAA
• 2010: Team leader in fact finding mission on the Extent of alcohol and drug abuse in Kenya funded by GJLOS
• 2010: Conducted a survey on the extent and types of drugs abused by the Kenya National Library staff.

Networks and Collaborations

Editorial board/Referee/ reviewed for Professional Periodicals

• March 2023: Reviewed Manuscript for CABI on Optimization of African Indigenous Vegetables production in Sub Saharan Africa -A review.'
• 2022- to date – Editorial board of Journal of Tropical Insect Science
• Participated in the final Review of the National Research Fund (NRF) proposal on the Desert Locust in 2020
• February 2019: Reviewed manuscript for Agricultural and Forest Entomology; "Crop diversification and pest management: an analysis on fall armyworm (Spodoptera frugiperda Smith) in Quelimane, Mozambique" for Agricultural and Forest Entomology.
• January 2019: Reviewed Manuscript ID JEN-2019-0007.R1, for Journal of Applied Entomology; "Disentangling factors limiting diamondback moth, Plutella xylostella spatio-temporal population abundance: a tool for pest forecasting"
• November 2017: Reviewed manuscript for the BICONTROL Journal: BCON-17-513; Factors influencing the parasitism rates by the larval parasitoid complex of Plutella xylostella (L.) in Southern Brazil and consequences for pest management.
• December 2016: Reviewer for the 1^st call of National Research Fund (NRF) proposals for 2016/2017 Financial year at Nairobi safari Club, Lillian Towers, Nairobi Kenya.
• August 2015: Reviewed a proposal for the 2015 KU Vice-chancellor’s Research Grant; titled “Upgrading value chain for improved milk production and marketing in Machakos County, Kenya
• February 2013: Reviewed dossier on request for permission to import, Phytoseiulus swirskii for the control of thrips and white flies for KEPHIS and KSTCIE
• March 2011: Reviewed dossier on application for Country wide releases of Fopius arisanus (Sonan) (Hymenoptera: Braconidae) for biological control of the invasive fruit fly species Bactrocera invadens (Diptera: Tephiritidae) for KEPHIS and KSTCIE
• February 2011: Reviewed dossier on Post release monitoring report on Phaedrotroma scabriventis (Nixon) (Hymenoptera: Braconidae), a biological control agent of the invasive Liriomyza leaf miner in Central for KEPHIS and KSTCIE
• January 2011: Reviewed dossier on “application for field release permit for Diachasmimorpha longicaudata (Ashmead) (Hymenoptera: Braconidae), a biological control of the invasive fruit fly species Bactrocera invadens Drew, Tsuruta & White (Diptera: Tephiritidae) for KEPHIS and KSTCIE
• June 2009: Reviewer: HortScience on “Impact of western flower thrips (Frankliniella occidentalis) and bean flower thrips (Megalurothrips sjostedti) (Thysanoptera: Thripidae) on growth and yield of French beans (Phaseolus vulgaris) in monocrop and intercrop systems.

 Consulting for International and National Boards

• 2008 to 2016: Consultant for the National Campaign Against Drugs Abuse Authority (NACADAA)

 Consulting for International/ local Organization/Institutions

• CAB International: May 2024: Development of a Curriculum for Integrated Pest Management strategies for extension service providers
• Ministry of Agriculture and Livestock Development (MOALD)- Jan 2024. Participated in the development of the Mango Value Chain Development Strategy
• Korea Cooperative Agency (KOICA) 2022- Oct 2023- Participated in Country and Invitational Program to South Korea on “Driving Financial Inclusion Through a Policy Framework for Healthy and Sustainable Food Systems in Kenya”
• Ministry of Agriculture and Livestock Development (MOALD)- 2023- Participated in the development of contingency plans workshop invitation for migratory pests Quelea quelea birds and fall army worms/African army worms in Kenya
• Ministry of Agriculture and Livestock Development (MOALD)- Aug-Dec 2023 participated on integrated multi-pest monitoring and reporting tool
• Consulting for AATF
• Consulting for Kenya Agricultural Livestock and Research Organization (KALRO)
• Consulting for Kenya Plant Health Inspectorate Services (KEPHIS)
• June 2023- Review of the technical report on the golden apple snails in Kenya for KALRO
• CABI- 2018- Participated in Prioritization of Invasive Alien Species with potential to threaten agriculture and biodiversity in Kenya through horizon scanning
• Feb 2021: Participated in the prioritization and ranking of the National research fund (NRF) Desert locust short term and long term proposals
• May 2020 Reviewed a Dossier for KEPHIS from KARLO and CABI on Application for the importation of Eiphosoma laphygmae Costa Lima (Hymenoptera: Ichneumonidae) Parasitoid of the Fall Armyworm Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae).
• 2008 to 2016: Consultant for the National Campaign Against Drugs Abuse Authority (NACADAA)

Membership of Academic/Professional Bodies

• 2019- to date: Women Educational Researchers of Kenya (WERK)
• 2019 to date; Vice Chairman Entomological Society of Kenya
• 2020 to date: Association of Africa Insect Science (AAIS)
• Life Member : The Kenya Society for Deaf Children (KSDC)
• 2012 to date: Member of Horticultural association of Kenya (HAK)
• 2013 to date: Member of Association of Africa Crop Science Society (ACSS)
• 2008 to date: Member of Women Organizing Change in Agriculture and Natural Resource Management (WOCAN)
• 2006 to date: Member of The International Working Group for the Diamondback Moth

 Any Other Editorship/Peer Reviewer, External Examiner

Reviewer

• 2021-todate: International Journal of Tropical Insect Science – part of the consortium as manuscript reviewer and editorial team
• May 2020 Reviewed a Dossier for KEPHIS from KARLO and CABI on Application for the importation of Eiphosoma laphygmae Costa Lima (Hymenoptera: Ichneumonidae) Parasitoid of the Fall Armyworm Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae).
• July 2019: Reviewed VCs proposals for Embu University
• 2022 Manuscript review for CABI- - Growth and Yield Performance of Carrot (Daucus carota) as Affected by Plant Population Density in Dessie City, North eastern Ethiopia

External Examiner

1. October 2019-to date: External examiner of Department of Plant Sciences and Crop Protection University of Nairobi (UON),
2. 1997: Examiner for the Primary Teacher Education (PTE) in Kenya.
3. December 1993- 1997: Examiner with the Kenya National Examination Council (KNEC) in KCSE Biology and Geography