When Climate Fuels Pests: How Climate Change-Induced Pest Invasion is Reshaping Ecosystems and Livelihoods in East Africa
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Abstract
Pest damage continues to undermine food security and farmers’ livelihoods across East Africa, yet a comprehensive synthesis of its cascading ecological and socioeconomic consequences is lacking in the literature. Climate change, through rising temperatures, erratic rainfall, and recurring droughts, is fundamentally altering pest behaviour and distribution across the region, driving a phenomenon here described as pest invasion: the climate-driven process by which previously contained pests break out of their historical boundaries, colonise new elevations and seasons, and destabilise the ecological relationships that once kept their populations in check. This review therefore aimed to: (i) analyse the impact of climate change on pest dynamics in East Africa, including shifts in distribution and phenology; (ii) examine the ecological consequences of pest proliferation on ecosystem structure and function; (iii) assess the socioeconomic implications for livelihoods and food security; and (iv) evaluate adaptive and area-wide pest management strategies. A qualitative narrative review synthesised peer-reviewed literature (2015-2025) from Google Scholar, ScienceDirect, and JSTOR, screened for empirical rigour, geographic focus, and thematic relevance. Evidence shows that invasive pests, including fall armyworm, desert locusts, false codling moth, and Prosopis juliflora, are generating compound burdens of biodiversity loss, yield reduction, and pesticide dependence, disproportionately borne by smallholder farmers, particularly women. Area-wide integrated pest management emerges as an essential response, yet adoption remains constrained by weak policy frameworks, limited extension capacity, and insufficient regional coordination. The review concludes that climate-resilient, gender-responsive, and regionally coordinated pest management systems are essential for long-term food security and ecological sustainability in East Africa.
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Copyright (c) 2026 Asuman Adala, Dr. Gerald Lubega, Ms Susan Natsite, Mr Benon Kisomose (Author)
This work is licensed under a Creative Commons Attribution 4.0 International License.
Dr. Gerald Lubega, Uganda Martyrs University, Kampala, Uganda.
Dr Gerald Lubega is the Dean, Faculty of Agriculture at Uganda Martyrs University, Kampala, Uganda. He is also a senior lecturer in pest management
Abbasi, E. (2025). Climate Change and Vector-Borne Disease Transmission: The Role of Insect Behavioral and Physiological Adaptations. In Integrative Organismal Biology (Vol. 7, Number 1). Oxford University Press. https://doi.org/10.1093/iob/obaf011
Abdulahi, M. M., Ute, J. A., & Regasa, T. (2017). Prosopis Juliflora l: Distribution, impacts and available control methods in Ethiopia. In Tropical and Subtropical Agroecosystems (Vol. 20, Number 1, pp. 75–89). Universidad Autonoma de Yucatan. https://doi.org/10.56369/tsaes.2260
Abdullahi, A. M., Kalengyo, R. B., & Warsame, A. A. (2024). The unmet demand of food security in East Africa: review of the triple challenges of climate change, economic crises, and conflicts. Discover Sustainability, 5(1). https://doi.org/10.1007/s43621-024-00381-5
AbuElEla, S. A., Hori, M., Michio, K., Agathokleous, E., Nagasawa, A., & ElSayed, W. M. (2025). How can elevated CO2 influence plant-herbivore insect interactions? In Chemoecology (Vol. 35, Numbers 3–4, pp. 205–215). Springer Nature. https://doi.org/10.1007/s00049-025-00428-7
Ainsworth, E. A., Sanz-Saez, A., & Leisner, C. P. (2025). Crops and rising atmospheric CO2: Friends or foes? In Philosophical Transactions of the Royal Society B: Biological Sciences (Vol. 380, Number 1927). Royal Society Publishing. https://doi.org/10.1098/rstb.2024.0230
Ajam, A. L., Karungi, J., Ogwal, G., Adumo, S. A., Paparu, P., & Otim, M. H. (2024). Population Dynamics of Fall Armyworm (Lepidoptera: Noctuidae) in Maize Fields in Uganda. Insects, 15(5). https://doi.org/10.3390/insects15050301
Akhter, S., Krishna Naik, V., Jyothi Naladi, B., Rathore, A., Yadav, P., Lal, D., & Jammu Jammu, G. (2024). The Ecological Impact of Pesticides on Non-Target Organisms in Agricultural Ecosystems. Author Advances in Bioresearch Adv. Biores, 15(4), 322–334. https://doi.org/10.15515/abr.0976-4585.15.4.322334
Alotaibi, M. (2023). Climate change, its impact on crop production, challenges, and possible solutions. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 51(1). https://doi.org/10.15835/nbha51113020
Assèdé, E. S. P., Othoo, C. O., Ly, A., Bayisa, G., Tarkegn, T. G., Zohoun, M., & N’goran, A. J. (2025). Research progress on climate change adaptation strategies to control invasive crop pest in sub-Saharan Africa: a bibliometric and systematic review. In Frontiers in Climate (Vol. 7). Frontiers Media SA. https://doi.org/10.3389/fclim.2025.1478721
Ayompe, L. M., & Epie, W. N. (2025). Building Africa’s climate resilience: understanding the impacts and future strategies in the face of climate change. In Frontiers in Climate (Vol. 7). Frontiers Media SA. https://doi.org/10.3389/fclim.2025.1619799
Barasa, B., Watsusi, C. W., Gudoyi, P. M., Lutaaya, N., Gumisiriza, L. T., & Magaya, J. P. (2023). Desert Locust Invasion in Uganda: Effects on Household Food Consumption and Effective Control Interventions. Sustainability (Switzerland), 15(19). https://doi.org/10.3390/su151914496
Bekele, K., Adoyo, B., Kilawe, C. J., & Schaffner, U. (2024). Impacts of invasions by Prosopis species on rural livelihoods: The human dimension. In The Ecology and Management of Invasive Prosopis Trees in Eastern Africa (pp. 121–138). CABI International. https://doi.org/10.1079/9781800623644.0008
Cahon, T., Caillon, R., & Pincebourde, S. (2018). Do aphids alter leaf surface temperature patterns during early infestation? Insects, 9(1). https://doi.org/10.3390/insects9010034
Choruma, D. J., Dirwai, T. L., Mutenje, M. J., Mustafa, M., Chimonyo, V. G. P., Jacobs-Mata, I., & Mabhaudhi, T. (2024). Digitalisation in agriculture: A scoping review of technologies in practice, challenges, and opportunities for smallholder farmers in sub-saharan africa. In Journal of Agriculture and Food Research (Vol. 18). Elsevier B.V. https://doi.org/10.1016/j.jafr.2024.101286
Dakhil, M. A., El-Keblawy, A., El-Sheikh, M. A., Halmy, M. W. A., Ksiksi, T., & Hassan, W. A. (2021). Global invasion risk assessment of prosopis juliflora at biome level: Does soil matter? Biology, 10(3). https://doi.org/10.3390/biology10030203
Day, R., Haggblade, S., Moephuli, S., Mwang’ombe, A., & Nouala, S. (2022). Institutional and policy bottlenecks to IPM. In Current Opinion in Insect Science (Vol. 52). Elsevier Inc. https://doi.org/10.1016/j.cois.2022.100946
Early, R., González-Moreno, P., Murphy, S. T., & Day, R. (2018). Forecasting the global extent of invasion of the cereal pest Spodoptera frugiperda, the fall armyworm. NeoBiota, (40), 25–50. https://doi.org/10.3897/neobiota.40.28165
Erbaugh, J. M., Donnermeyer, J., Amujal, M. M., & Kyamanywa, S. (2003). The Role of Women in Pest Management Decision Making in Eastern Uganda 1 (Vol. 10, Number 3).
FAO. (2020). Desert locust crisis.
Hussain, M. I., Shackleton, R. T., El-Keblawy, A., Del Mar Trigo Pérez, M., & González, L. (2020). Invasive mesquite (Prosopis juliflora), an allergy and health challenge. In Plants (Vol. 9, Number 2). MDPI AG. https://doi.org/10.3390/plants9020141
Kalyebi, A., Otim, M. H., Walsh, T., & Tay, W. T. (2023). Farmer perception of impacts of fall armyworm (Spodoptera frugiperda J.E. Smith) and transferability of its management practices in Uganda. CABI Agriculture and Bioscience, 4(1). https://doi.org/10.1186/s43170-023-00150-w
Kamiri, H. W., Choge, S. K., & Becker, M. (2024). Management Strategies of Prosopis juliflora in Eastern Africa: What Works Where? In Diversity (Vol. 16, Number 4). Multidisciplinary Digital Publishing Institute (MDPI). https://doi.org/10.3390/d16040251
Katushabe, J., Nnyanzi, J. B., & Muwanga, G. S. (2024). Exploring the role of spending on malaria incidence in Uganda using the auto-regressive distributed lag approach. Malaria Journal, 23(1). https://doi.org/10.1186/s12936-024-04929-8
Manono, B. O., & Mwami, B. (2026). Agroforestry and Soil Health: A Review of Impacts and Potential for Sustainable Agriculture. Earth, 7(1), 31. https://doi.org/10.3390/earth7010031
Mlambo, S., Mubayiwa, M., Tarusikirwa, V. L., Machekano, H., Mvumi, B. M., & Nyamukondiwa, C. (2024). The Fall Armyworm and Larger Grain Borer Pest Invasions in Africa: Drivers, Impacts and Implications for Food Systems. In Biology (Vol. 13, Number 3). Multidisciplinary Digital Publishing Institute (MDPI). https://doi.org/10.3390/biology13030160
Monica, K. K., Fernadis, M., Duncan, C., Winnie, N., Daniel, K., & Léna, D. G. (2024). Area-wide pest management and prospects for fall armyworm control on smallholder farms in Africa: A review. In Sustainable Environment (Vol. 10, Number 1). Taylor and Francis Ltd. https://doi.org/10.1080/27658511.2024.2345464
Mubenga-Tshitaka, J. L., Dikgang, J., Muteba Mwamba, J. W., & Gelo, D. (2023). Climate variability impacts on agricultural output in East Africa. Cogent Economics and Finance, 11(1). https://doi.org/10.1080/23322039.2023.2181281
Mullié, W. C., Prakash, A., Müller, A., & Lazutkaite, E. (2023). Insecticide Use against Desert Locust in the Horn of Africa 2019–2021 Reveals a Pressing Need for Change. Agronomy, 13(3). https://doi.org/10.3390/agronomy13030819
Nabatanzi, M., Ntono, V., Kamulegeya, J., Kwesiga, B., Bulage, L., Lubwama, B., Ario, A. R., & Harris, J. (2022). Malaria outbreak facilitated by increased mosquito breeding sites near houses and cessation of indoor residual spraying, Kole district, Uganda, January-June 2019. BMC Public Health, 22(1). https://doi.org/10.1186/s12889-022-14245-y
Nega, A. (2025). Climate Change Impacts on Agriculture: A Review of Plant Diseases and Insect Pests in Ethiopia and East Africa, With Adaptation and Mitigation Strategies. In Advances in Agriculture (Vol. 2025, Number 1). John Wiley and Sons Ltd. https://doi.org/10.1155/aia/5606701
Ngetich, F. K., Mairura, F. S., Musafiri, C. M., Kiboi, M. N., & Shisanya, C. A. (2022). Smallholders’ coping strategies in response to climate variability in semi-arid agro-ecozones of Upper Eastern Kenya. Social Sciences and Humanities Open, 6(1). https://doi.org/10.1016/j.ssaho.2022.100319
Obame-Nkoghe, J., Agossou, A. E., Mboowa, G., Kamgang, B., Caminade, C., Duke, D. C., Githeko, A. K., Ogega, O. M., Engone Elloué, N., Sarr, F. B., Nkoghe, D., Kengne, P., Ndam, N. T., Paupy, C., Bockarie, M., & Voua Otomo, P. (2024). Climate-influenced vector-borne diseases in Africa: a call to empower the next generation of African researchers for sustainable solutions. Infectious Diseases of Poverty, 13(1). https://doi.org/10.1186/s40249-024-01193-5
Omotoso, A. B., & Omotayo, A. O. (2024). The interplay between agriculture, greenhouse gases, and climate change in Sub-Saharan Africa. In Regional Environmental Change (Vol. 24, Number 1). Springer Science and Business Media Deutschland GmbH. https://doi.org/10.1007/s10113-023-02159-3
Oriangi, G., Mukwaya, P. I., Luwa, J. K., Emmanuel, M., Maxwell, M. G., & Bamutaze, Y. (2024). Variability and Changes in Climate in Northern Uganda. African Journal of Climate Change and Resource Sustainability, 3(1), 81–97. https://doi.org/10.37284/ajccrs.3.1.1830
Osae, M., Gariba, A. A., Wilson, M., Dalaa, M., Obeng Adomaa, F., Kyere, R., Frimpong-Anin, K., Adomako, J., & Tepa-Yotto, G. (2024). Early Warning and Rapid Response System for Pests and Diseases An Operational Guide Handbook [xxx] Report AICCRA Handbook: Early Warning and Rapid Response System for Pests and Diseases. An Operational Guide for Ghana. Accelerating Impacts of CGIAR Climate Research for Africa (AICCRA).
Ravi Sharma, K., Kumar Jaiswal, D., Ramesh Babu, S., Kumar Saraoj, A., & Author, C. (n.d.). IMPACT OF INVASIVE INSECT PESTS SPECIES ON AGRO-ECOSYSTEM IN INDIA AND THEIR MANAGEMENT. Retrieved www.ijaas.org.in
Salih, A. A. M., Baraibar, M., Mwangi, K. K., & Artan, G. (2020). Climate change and locust outbreak in East Africa. In Nature Climate Change (Vol. 10, Number 7, pp. 584–585). Nature Research. https://doi.org/10.1038/s41558-020-0835-8
Sekabira, H., Tepa-Yotto, G. T., Djouaka, R., Clottey, V., Gaitu, C., Tamò, M., Kaweesa, Y., & Ddungu, S. P. (2022). Determinants for Deployment of Climate-Smart Integrated Pest Management Practices: A Meta-Analysis Approach. Agriculture (Switzerland), 12(7). https://doi.org/10.3390/agriculture12071052
Sisay, B., Simiyu, J., Mendesil, E., Likhayo, P., Ayalew, G., Mohamed, S., Subramanian, S., & Tefera, T. (2019). Fall armyworm, spodoptera frugiperda infestations in East Africa: Assessment of damage and parasitism. Insects, 10(7). https://doi.org/10.3390/INSECTS10070195
Skendžić, S., Zovko, M., Živković, I. P., Lešić, V., & Lemić, D. (2021). The impact of climate change on agricultural insect pests. In Insects (Vol. 12, Number 5). MDPI AG. https://doi.org/10.3390/insects12050440
Sorahia, D., Lokesh, M., Das, A., Kumari, N., Roy, T., Singh, V., Gawaria, J., & Mehla, S. (2025). Examining the Emergence of Insect Pests under Changing Climate: A Comprehensive Review. Journal of Advances in Biology & Biotechnology, 28(9), 1750–1765. https://doi.org/10.9734/jabb/2025/v28i93020
Subedi, B., Poudel, A., & Aryal, S. (2023). The impact of climate change on insect pest biology and ecology: Implications for pest management strategies, crop production, and food security. Journal of Agriculture and Food Research, 14. https://doi.org/10.1016/j.jafr.2023.100733
Summerhayes, C. P., Zalasiewicz, J., Head, M. J., Syvitski, J., Barnosky, A. D., Cearreta, A., Fiałkiewicz-Kozieł, B., Grinevald, J., Leinfelder, R., McCarthy, F. M. G., McNeill, J. R., Saito, Y., Wagreich, M., Waters, C. N., Williams, M., & Zinke, J. (2024). The future extent of the Anthropocene epoch: A synthesis. Global and Planetary Change, 242. https://doi.org/10.1016/j.gloplacha.2024.104568
Thompson, M., Gamage, D., Hirotsu, N., Martin, A., & Seneweera, S. (2017). Effects of elevated carbon dioxide on photosynthesis and carbon partitioning: A Perspective on root sugar sensing and hormonal crosstalk. In Frontiers in Physiology (Vol. 8, Number AUG). Frontiers Media S.A. https://doi.org/10.3389/fphys.2017.00578
Umesh Vishal, M., Rani, T., Kumar, P., & Yadav, P. (2025). Influence of Climate Change on Pest Populations and Natural Enemy Relationships in Agricultural Systems.
V, A., Kalasariya, R., . S., K, S. S., & R, R. (2024). Impacts of increasing atmospheric carbon dioxide on insect pests and natural enemies. International Journal of Advanced Biochemistry Research, 8(8S), 1244–1250. https://doi.org/10.33545/26174693.2024.v8.i8sp.2060
van Wilgen, B. W., Linders, T. E. W., & Bekele, K. (2024). The impact of invading Prosopis species on biodiversity and ecosystem services. In The Ecology and Management of Invasive Prosopis Trees in Eastern Africa (pp. 75–93). CABI International. https://doi.org/10.1079/9781800623644.0005
Yami, M., Liverpool-Tasie, L. S. O., Maiwad, R., Wossen, T., Falade, T. D. O., Oyinbo, O., Yamauchi, F., Chamberlin, J., Feleke, S., & Abdoulaye, T. (2025). Farmers’ pesticide use, disposal behavior, and pre-harvest interval: a case study from Nigeria. Frontiers in Sustainable Food Systems, 9. https://doi.org/10.3389/fsufs.2025.1520943
Zhou, W., Arcot, Y., Medina, R. F., Bernal, J., Cisneros-Zevallos, L., & Akbulut, M. E. S. (2024). Integrated Pest Management: An Update on the Sustainability Approach to Crop Protection. In ACS Omega (Vol. 9, Number 40, pp. 41130–41147). American Chemical Society. https://doi.org/10.1021/acsomega.4c06628
Zhou, W., Li, M., & Achal, V. (2025). A comprehensive review on environmental and human health impacts of chemical pesticide usage. In Emerging Contaminants (Vol. 11, Number 1). KeAi Communications Co. https://doi.org/10.1016/j.emcon.2024.100410
Zielinski, C. (2023). COP27 Climate Change Conference: Urgent action needed for Africa and the world. In Palliative Medicine (Vol. 37, Number 1, pp. 7–9). SAGE Publications Ltd. https://doi.org/10.1177/02692163221134453
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