Publications

Found 59 results

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2019
Kwadha CA, Janet Irungu, George Ongamo, Paul Ndegwa, Suresh Raina AFT. "Decanal as a major component of larval aggregation pheromone of the greater wax moth, Galleria mellonella." Journal of Applied Entomology. 2019;143(4):417-429.
Ru BL, Capdevielle-Dulac C, Njaku M, Assefa Y, Chipabika G, George Ong’Amo, Jérôme Barbut GKJ. "Updated phylogenetic and systematics of the Acrapex albivena Hampson, 1910 and A. stygiata (Hampson, 1910) species groups (Lepidoptera, Noctuidae, Noctuinae, Apameini, Sesamiina), with the description of nine new species from the Afrotropics." Annales de la Société entomologique de France (NS). 2019;55(3):219-248.
2018
Ong’amo GO, Pallangyo B, Ali A, Njaku M, LeRu BP. "Diversity and abundance of lepidopteran stem borers and their respective native hosts in different vegetation mosaics in Tanzania." African Entomology. 2018;26(1):50-62.
Ondiba IM, Oyieke FA, Ong’amo GO, Olumula MM, Nyamongo IK, Estambale BBA. "Malaria vector abundance is associated with house structures in Baringo County, Kenya." PloS one. 2018;13(6):e0198970.
Amadi JA, Ong'amo GO, Olago DO, Oriaso SO, Nyamongo IK, Estambale BBA. "Mapping potential Anopheles gambiae s.l. larval distribution using remotely sensed climatic and environmental variables in Baringo, Kenya." Medical and veterinary entomology. 2018.
Stephen F Omondi, Odee DW, Ongamo GO, Kanya JI, Khasa DP. "Mating patterns of the gum arabic tree (Acacia senegal synonym Senegalia senegal) in two different habitats." New Forests. 2018;49(1):53-65.
Amadi JA, Olago DO, Ong’amo GO, Oriaso SO, Nanyingi M, Nyamongo IK, Estambale BBA. "Sensitivity of vegetation to climate variability and its implications for malaria risk in Baringo, Kenya." PloS one. 2018;13(7):e0199357.
2017
Kwadha CA, Ong’amo GO, Ndegwa PN, Raina SK, Fombong AT. "The biology and control of the greater wax moth, Galleria mellonella." Insects. 2017;8(2):61.
Ru BL, Capdevielle-Dulac C, Musyoka BK, Goftishu M, Assefa Y, Ndemah R, Molo R, Chipab G. "Molecular phylogenetics and definition of the Acrapex minima Janse group (Lepidoptera, Noctuidae, Apameini, Sesamiina) with the description of four new species from the Afrotropics." Annales de la Société entomologique de France (NS). 2017;53(4):219-235.
Omondi CJ, Onguru D, Kamau L, Nanyingi M, Ong’amo G, Estambale B. "Perennial transmission of malaria in the low altitude areas of Baringo County, Kenya." Malaria journal. 2017;16(1):257.
LeRu BP, Capdevielle-Dulac C, Musyoka BK, Pallangyo B, Njaku M, Mubenga O, Chipabika G, Ndemah R, Bani G, Molo R, Ong’amo GO, Kergoat GJ. "Phylogenetic analysis and systematics of the Acrapex unicolora Hampson species complex (Lepidoptera, Noctuidae, Noctuinae, Apameini), with the description of five new species from the Afrotropics ." EUROPEAN JOURNAL OF TAXONOMY . 2017;270:1-36.
Ru BL, Capdevielle-Dulac C, Musyoka BK, Pallangyo B, Njaku M, Goftishu M, Assefa Y, Sezonlin M, Ong’amo G, Kergoat GJ. "Phylogeny and systematics of the Acrapex apicestriata (Bethune-Baker, 1911) species complex (Lepidoptera, Noctuidae, Noctuinae, Apameini, Sesamiina) with the description of eight new species from the Afrotropics." Annales de la Société entomologique de France (NS). 2017;53(2):106-130.
Ndlela S, Ekesi S, Ndegwa PN, Ong'amo GO, Mohamed SA. "Post‐harvest disinfestation of Bactrocera dorsalis (Hendel) (Diptera: Tephritidae) in mango using hot‐water treatments." Journal of Applied Entomology. 2017;141(10):848-859.
Abdel-Rahman EM, Landmann T, Richard Kyalo, Ong’amo G, Mwalusepo S, Sulieman S, Ru BL. "Predicting stem borer density in maize using RapidEye data and generalized linear models." International journal of applied earth observation and geoinformation. 2017;57:61-74.
2016
Ong’amo G, Khadioli N, LeRu B, Mujica N, Carhuapoma P. "African Pink stemborer, Sesamia calamistis (Hampson 1910).". In: Pest distribution and risk atlas for Africa. Potential global and regional distribution and abundance of agricultural and horticultural pests and associated biocontrol agents under current and future climates. Lima (Peru).: International Potato Center (CIP).; 2016.
Midingoyi SG, Affognon HD, Macharia I, Ong’amo G, Abonyo E, Ogola G, H. DG, LeRu BP. "Assessing the long-term welfare effects of the biological control of cereal stemborer pests in East and Southern Africa: Evidence from Kenya, Mozambique and Zambia Agriculture." ECOSYSTEMS AND ENVIRONMENT . 2016;230:10-23.
Calatayud P-A, Njuguna E, Mwalusepo S, Gathara M, Okuku G, Kibe A, B M, Williamson D, Ong’amo G, Juma G, Johansson T, Subramanian S, Gatebe E, BP LR. "Can climate-driven change influence silicon assimilation by cereals and hence the distribution of lepidopteran stem borers in East Africa? ." AGRICULTURE, ECOSYSTEMS AND ENVIRONMENT. 2016;224:95-103.
Omondi SF, Odee DW, Ongamo GO, Kanya JI, Khasa DP. "Effects of Anthropogenic Disturbances on Natural Regeneration and Population Structure of Gum Arabic Tree (Acacia senegal) in the Woodland of Lake Baringo Ecosystem, Kenya." JOURNAL OF FORESTRY RESEARCH. 2016:DOI: 10.1007/s11676-016-0349-4.
Omondi SF, Odee DW, Ongamo GO, Kanya JI, Khasa DP. "Genetic consequences of anthropogenic disturbances and population fragmentation in Acacia senegal." CONSERVATION GENETICS . 2016;17(6):1235-1244.
Ong’amo G, Khadioli N, LeRu B, Mujica N, Carhuapoma P. "Maize stalk borer, Busseola fusca (Fuller 1901).". In: Pest distribution and risk atlas for Africa. Potential global and Regional distribution and abundance of agricultural and horticultural pests and associated biocontrol agents under current and future climates. Lima (Peru): International Potato Center (CIP).; 2016.
Ong’amo G, Khadioli N, LeRu B, Mujica N, Carhuapoma P. "Spotted stemborer, Chilo partellus (Swinhoe 1885).". In: Pest distribution and risk atlas for Africa. Potential global and regional distribution and abundance of agricultural and horticultural pests and associated biocontrol agents under current and future climates. Lima (Peru). : International Potato Center (CIP). ; 2016.
Omondi SF, Odee DW, Ongamo GO, Kanya JI, Khasa DP. "Synchrony in leafing, flowering and fruiting phenology of Senegalia senegal within Lake Baringo woodland, Kenya: Implication for conservation and tree improvement." INTERNATIONAL JOURNAL OF FORESTRY RESEARCH. 2016:ID 6904834.
2015
Elijah Njuguna, Gathara M, Nadir S, Mwalusepo S, Williamson D, Mathé P-E, Kimani J, Landmann T, Juma G, Ong’amo G, Gatebe E, Ru BL, Calatayud P-A, Calatayud P-A. "Characteristics of soils in selected maize growing sites along altitudinal gradients in East African highlands." Data in brief. 2015:138-144.
Oyieke F, Ondiba I, Ong’amo G, Njaanake K, Nyamongo I, Estambale B. "Diversity and Distribution of Mosquitoes Transmitting Malaria and Rift Valley Fever in Baringo County, Kenya.". 2015.
Juma G, Ahuya PO, Ong’amo G, LeRu BP, Magoma G, Silvain J-F, Calatayud P-A. "Influence of plant silicon in Busseola fusca (Lepidoptera: Noctuidae) larvae – Poaceae interactions." BULLETIN OF ENTOMOLOGICAL RESEARCH. 2015:DOI: 101017/S000748531500005X.
Kergoat GJ, Toussaint EFA, Capdevielle-Dulac C, Clamens A-L, Ong’amo GO, Conlong D, Van Den Berg J, Cugala D, Pallangyo B, Mubenga O, Chipabika G, Ndemah R, Sezonlin M, Bani G, Molo R, Ali A, Calatayud P-A, Kaiser L, Silvain J-F, LeRu BP. "Integrative taxonomy reveals six new species related to the Mediterranean corn stalk borer Sesamia nonagrioides (Lefèbvre) (Lepidoptera, Noctuidae, Sesamiina)." ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY . 2015;175:244-270.
LeRu BP, Capdevielle-Dulac C, Conlong D, Pallangyo B, den Berg JOHNNIEV, Ong’amo G, Kergoat GJ. "A revision of the genus Conicofrontia Hampson (Lepidoptera, Noctuidae, Apameini, Sesamiina), with description of a new species: new insights from morphological, ecological and molecular data." Zootaxa. 2015;3925(1):056-074.
Mwalusepo S, Massawe ES, Affognon HD, Okuku GO, Kingori S, Mburu DM, Ong’amo GO, Muchugu E, Calatayud P-A, Landmann T, Muli E, Raina SK, Johansson T, Ru BPL. "Smallholder farmers’ perspectives on climatic variability and adaptation strategies in East Africa: The case of Mount Kilimanjaro in Tanzania, Taita and Machakos Hills in Kenya." Earth Science & Climatic Change. 2015;6(10):01-09.
Sambai K, Ru BLP, Gathara M, Ong’amo G, Elijah Njuguna, Juma G, Mwalusepo S, Okuku G, Calatayud PA, Gatebe E, Johansson T. "Variation of soil nutrients in maize growing areas along the altitudinal gradient of Taita hills transect in Kenya.". 2015.
2014
Calatayud PA, Okuku G, Musyoka B, Khadioli N, Ong’amo G. "Busseola segeta, a Potential New Pest of Maize in Western Kenya." ENTOMOLOGY, ORNITHOLOGY & HERPETOLOGY. 2014;3:132.
Ong'amo GO, LeGall P, Ndemah R, LeRu BP. "Diversity and host range of lepidopteran stemborer species in Cameroon ." African Entomology. 2014;22:625-635.
Khadioli N, Tonnang ZEH, Muchugu E, Ong’amo G, Achia T, Kipchirchir I, Kroschel J, LeRu B. "Effect of temperature of the phenology of Chilo partellus (Swinhoe) (Lepidopteran); simulation and visualization of the potential future distribution of C. partellus in Africa." Bulletin of Entomological Research. 2014;(104):823-832.
Khadioli N, Tonnang ZEH, Muchugu E, Ong’amo G, Achia T, Kipchirchir I, Kroschel J, LeRu B. "Effect of temperature of the phenology of Chilo partellus (Swinhoe)(Lepidopteran); simulation and visualization of the potential future distribution of C. partellus in Africa." Bulletin of Entomological Research. 2014;(104).
Khadioli N, Tonnang ZEH, Ong’amo G, Kroschel J, LeRu B. "Effect of temperature on the life history parameters of noctuid lepidopteran stem borers, Busseola fusca (Fuller) and Sesamia calamistis Hampson." Annals of Applied Biology. 2014;(165):373-386.
Kergoat GJ, Cuda JP, Overholt WA, Molo R, Chipabika G, Ong’amo G, Pallangyo B, Berg JV, Conlong D, Toussaint EFA, Capdevielle-Dulac C, Ru BLP. "Integrative taxonomy of Acrapex stem borers (Lepidoptera: Noctuidae: Apameini): combining morphology and Poisson Tree Process analyses.". 2014.
LeRu B, Capdevielle-Dulac C, Toussaint EFA, Conlong D, Van-den-Berg J, Pallangyo B, Ong’amo G, Chipabika G, Molo R, Overholt WA, Cuda JP, Kergoat GJ. "Molecular phylogenetics and systematics of Acrapex stem borers (Lepidoptera, Noctuidae, Apameini). ." Invertebrate Systematics. 2014.
Calatayud PA, Silvain JF, Branca A, Dupas S, Gigot G, Ong'amo G, LeRu B, Campagne P, Sezonlin M, Faure N. "Phylogeography in continuous space: coupling species distribution models and circuit theory to assess the effect of contiguous migration at different climatic periods on ….". 2014.
Kankonda OM, Dudu A, Walangululu M, Ong’amo GO, Ru B-PL. "Stem borer species composition on maize and two non-cereal hosts in the forest zone of Kisangani, DRC." Journal of Agricultural Science and Technology A. 2014;(4):822-829.
2013
Ong’amo GO, LeRu BP, Calatayud P-A, Silvain J-F. "Composition of stem borer communities in selected vegetation mosaics in Kenya." Arthropod-Plant Interactions. 2013;7(3):267-275. Abstract

Busseola fusca (Fuller), Sesamia calamistis Hampson, Chilo partellus (Swinhoe) and Chilo orichalcociliellus (Strand) are important stem borer pests of maize and sorghum in East Africa. Persistence of these pests in crop fields is blamed on the influx of diaspore populations from the neighbouring natural habitats. In addition to pest species, natural habitats support numerous non-economic stem borer species, some not known to science. However, due to growing human populations and accompanying global change, some of the natural habitats are undergoing rapid changes, a process that may result in the evolution of ‘‘new’’ pest species. In this study, we investigated stem borer species diversity in four different vegetation mosaics in Kenya, with an aim of establishing the differences in species composition and distributions in both wild and cultivated habitats. We identified 33 stem borer species belonging to 14 different genera in the four families; Noctuidae, Crambidae, Pyralidae and Tortricidae from 37 plant species. In addition to the above stem borer pest species, we found three more species, Busseola segeta Bowden, Pirateolea piscator Fletcher and Eldana saccharina Walker, in the cultivated fields. Together, stem borer pests varied in distribution among vegetation mosaics, suggesting differences in ecological requirement. Despite the variations in distribution patterns, stem borer pests co-existed with non-economic species in the natural habitats, communities that are facing threats due to ongo ing habitat changes. This paper discusses the likely impacts of habitat changes on both pest and non-economic species.

Félix A-E, Calatayud P-A, LeRu B, Capdevielle-Dulac C, Ong’amo G, Silvain J-F, Frérot B. "To be or not to be a species: use of reproductive isolation experiments and genetic analysis to clarify the taxonomic status of two Busseola (Lepidoptera: Noctuidae) species in Kenya." Annales de la Société entomologique de France . 2013;49(3):345-354. Abstract

Phylogenetic analysis combined with chemical ecology can contribute to the delimitation of closely related insect species, particularly in Lepidoptera. In this study, the taxonomic status of a species in the genus Busseola (Lepidoptera: Noctuidae) was discussed using morphological data, cross-mating experiments, sex pheromone chemistry, field-trapping, and molecular classification. The results of the chemical ecology experiments corroborated those from the phylogeny studies. It was concluded that several reproductive isolation components, namely host plants, geography, pheromone emission time, pheromone blend, and post-zygotic isolation factors, led to the separation of Busseola n. sp. from its closely related species B. segeta. Molecular data showed a strong difference between these two species, regardless of the marker used. The new species named Busseola nairobica was morphologically described and a hypothesis about the evolutionary history of the studied species was put forward.

2012
Ong'amo G, LeRu BP, Campagne P, Branca A, Calatayud P-A, Capdevielle-Dulac C, Silvain J-F. "Genetic Diversity and Population Structure of Busseola segeta Bowden (Lepidoptera; Noctuidae): A case study of host use diversification in Guineo-Congolian rainforest relic area, Kenya." Science. 2012;3:1156-1170. Abstract

Habitat modification and fragmentation are considered as some of the factors that drive organism distribution and host use diversification. Indigenous African stem borer pests are thought to have diversified their host ranges to include maize [Zea mays L.] and sorghum [Sorghum bicolor (L.) Moench] in response to their increased availability through extensive cultivation. However, management efforts have been geared towards reducing pest populations in the cultivated fields with few attempts to understand possible evolution of "new" pest species. Recovery and growing persistence of Busseola segeta Bowden on maize (Zea mays L.) in Kakamega called for studies on the role of wild host plants on the invasion of crops by wild borer species. A two-year survey was carried out in a small agricultural landscape along the edge of Kakamega forest (Kenya) to assess host range and population genetic structure of B. segeta. The larvae of B. segeta were found on nine different plant species with the majority occurring on maize and sorghum. Of forty cytochrome b haplotypes identified, twenty-three occurred in both wild and cultivated habitats. The moths appear to fly long distances across the habitats with genetic analyses revealing weak differentiation between hosts in different habitats (FST = 0.016; p = 0.015). However, there was strong evidence of variation in genetic composition between growing seasons in the wild habitat (FST = 0.060; p < 0.001) with emergence or disappearance of haplotypes between habitats. Busseola segeta is an example of a phytophagous insect that utilizes plants with a human induced distribution range, maize, but does not show evidence of host race formation or reduction of gene flow among populations using different hosts. However, B. segeta is capable of becoming an important pest in the area and the current low densities may be attributed to the general low infestation levels and presence of a wide range of alternative hosts in the area.

2009
Mithöfer K, Ong'amo G, LeRu BP. "Development of species distribution models for lepidopteran stem borers and associated parasitoids in Kenya.". In: Conference on International Research on Food Security, Natural Resource Management and Rural Development. University of Hamburg, Germany; 2009.
2008
Ong'amo G, LeRu BP, Calatayud P-A, Capdevielle-Dulac C, Silvain J-F. "Microsatellite analyses reveal fine scale genetic structure of Busseola fusca (Fuller) (Lepidoptera: Noctuidae).". In: XXIII International Congress of Entomology. International convention Centre, Durban, South Africa; 2008.
Otieno NA, LeRu BP, Ong'amo G, Moyal P, Dupas S, Calatayud P-A, Silvain J-F. "Diversity and abundance of wild host plants of lepidopteran stem borers in two agro-ecological zones of Kenya." International journal of Biodiversity Science and Management. 2008;4:1-12.
Ong'amo G, LeRu BP, Moyal P, Calatayud P-A, LeGall P, Ogol CKPO, Kokwaro ED, Claire, Silvain J-F. "Hostplant diversity of Sesamia calamistis: cytochrome b gene sequences reveal local genetic differentiation." Entomologia Experimentalis et Applicata. 2008;128:154-161.
2006
Ong'amo G, LeRu BP, Dupas S, Moyal P, Calatyud P-A, Silvain J-F. "Distribution, pest status and agroclimatic preferences of lepidopteran stemborers of maize and sorghum in Kenya." Annales de la Société entomologique de France. 2006;42(2):171-177.
Otieno NA, LeRu BP, Ong'amo G, Dupas S, Calatayud P-A, Makobe M, Ochora J, Silvain J-F. "Diversity and abundance of wild host plants of lepidopteran stem borers in two different agro-ecological zones of Kenya." Annales de la Société entomologique de France. 2006;42(3-4):371-380.
LeRu BP, Ong'amo G, Moyal P, Ngala L, Musyoka B, Abdullah Z, Cugala D, Defabachew B, Hailei TA, Kauma TM, Lada VY, Negassi B, Ravolonandrianina KJ, Sidumo A, Omwega C, Schulthess F, Calatayud P-A, Silvain J-F. "Diversity of lepidopteran stem borers in eastern Africa revisited." Bulletin of Entomological Research. 2006;96:555-563.
LeRu BP, Ong'amo G, Moyal P, Muchungu E, Ngala L, Musyoka B, Abdullahi Z, Matama KT, Lada VY, Pallangyo B, Omwega C, Schulthess F, Calatayud P-A, Silvain J-F. "Major ecological characteristics of East African noctuid stem borers." Annales de la Société entomologique de France. 2006;42(3-4):353-361.
Ong'amo G, LeRu BP, Dupas S, Moyal P, Muchugu E, Calatayud P-A, Silvain J-F. "The role of wild host plants in the abundance of lepidopteran stem borers along altitudinal gradient in Kenya." Annales de la Société entomologique de France. 2006;42(3-4):363-370.

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