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Issue: Vol. 5793 No. 1: 15 Apr. 2026
Type: Article
Published: 2026-04-15
DOI: 10.11646/zootaxa.5793.1.8
Page range: 184-192
Abstract views: 73
PDF downloaded: 3

First record of Pagiocerus frontalis (Fabricius) (Coleoptera: Curculionidae: Scolytinae) in stored maize in Africa

The Nelson Mandela African Institution of Science and Technology (NM-AIST); P. O. Box 447; Arusha; Tanzania; Tanzania Plant Health and Pesticides Authority (TPHPA); P.O. Box. 3024; Arusha; Tanzania
The Nelson Mandela African Institution of Science and Technology (NM-AIST); P. O. Box 447; Arusha; Tanzania
The Nelson Mandela African Institution of Science and Technology (NM-AIST); P. O. Box 447; Arusha; Tanzania
Coleoptera seed grains avocado provitamin invasive bark beetle storage Tanzania

Abstract

Tanzanian smallholder farmers typically sell maize soon after harvest to avoid storage losses, but emerging pests threaten post-harvest systems and food security. The bark beetle Pagiocerus frontalis (Fabricius) (Coleoptera: Curculionidae: Scolytinae), a pest of maize and avocado seeds, is reported here for the first time in Africa. First detected in December 2018 on stored provitamin-A maize (CP201) in Arusha, Tanzania, its identity was confirmed through morphological characteristics, feeding behavior, and COI sequence analysis, which revealed close similarity to populations from Mexico and Panama. Pagiocerus frontalis caused severe damage to stored maize grain and to avocado seeds in our preliminary rearing trials. The species also demonstrated the ability to infest multiple maize varieties. Its impacts resemble those of the Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae), which caused severe grain losses following its introduction to Africa. Early detection and identification of P. frontalis are therefore critical to mitigate this emerging threat to African food security.

 

References

  1. Abass, A.B., Fischler, M., Schneider, K., Daudi, S., Gaspar, A., Rüst, J. & Msola, D. (2018) On-farm comparison of different postharvest storage technologies in a maize farming system of Tanzania Central Corridor. Journal of Stored Products Research, 77, 55–65. https://doi.org/10.1016/j.jspr.2018.03.004
  2. Al-Dhafer, H.M., Balaji, R., Abdel-Dayem, M.S., Rasool, I., Mohamed, A. & Palanisamy, S. (2025) Simple DNA extraction for museum beetle specimens to unlock genetic data from historical collections. MethodsX, 14, 103236. https://doi.org/10.1016/j.mex.2025.103236
  3. Aljanabi, S.M. & Martinez, I. (1997) Universal and rapid salt-extraction of high quality genomic DNA for PCR-based techniques. Nucleic Acids Research, 25, 4692–4693. https://doi.org/10.1093/nar/25.22.4692
  4. Altschul, S.F., Gish, W., Miller, W., Myers, E.W. & Lipman, D.J. (1990) Basic local alignment search tool. Journal of Molecular Biology, 215, 403–410. https://doi.org/10.1016/S0022-2836(05)80360-2
  5. Arthur, F.H., Morrison, W.R. & Morey, A.C. (2019) Modelling the potential range expansion of larger grain borer, Prostephanus truncatus (Coleoptera: Bostrichidae). Scientific Reports, 9, 6862. https://doi.org/10.1038/s41598-019-42974-5
  6. Asghar, U., Malik, M.F., Anwar, F., Javed, A. & Raza, A. (2015) DNA extraction from insects by using different techniques: a review. Advances in Entomology, 3, 132–138. https://doi.org/10.4236/ae.2015.34016
  7. Cairns, J.E. & Prasanna, B.M. (2018) Developing and deploying climate-resilient maize varieties in the developing world. Current Opinion in Plant Biology, 45, 226–230. https://doi.org/10.1016/j.pbi.2018.05.004
  8. Córdoba, S.P. & Atkinson, T.H. (2018) New records of Scolytinae (Coleoptera: Curculionidae) from Argentina. The Coleopterists Bulletin, 72, 376–379. https://doi.org/10.1649/0010-065X-72.2.376
  9. De Dios Avila, N., Velasco, C.R., Campos, J.C., Solorio, A.B., Miranda, J.L.D. & Virgen, M.O.E. (2021) Pagiocerus frontalis (Fabricius) (Coleoptera: Curculionidae: Scolytinae) associated with avocado (Persea americana Miller) fruit in Nayarit, Mexico. The Florida Entomologist, 104, 320–321. https://doi.org/10.1653/024.104.0409
  10. De Groote, H., Gunaratna, N.S., Fisher, M., Kebebe, E., Mmbando, F. & Friesen, D. (2016) The effectiveness of extension strategies for increasing the adoption of biofortified crops: The case of quality protein maize in East Africa. Food Security, 8, 1101–1121. https://doi.org/10.1007/s12571-016-0621-7
  11. Edgar, R.C. (2004) MUSCLE: multiple sequence alignment with high accuracy and high throughput. Nucleic Acids Research, 32, 1792–1797. https://doi.org/10.1093/nar/gkh340
  12. Eidt Wendt, J. & Schulz, F.A. (1990) Studies on the biology and ecology of Pagiocerus frontalis (Fabricius) (Coleoptera: Scolytidae) infesting stored maize in Ecuador. Journal of Applied Entomology, 109 (1–5), 365–373.
  13. Erenstein, O., Jaleta, M., Sonder, K., Mottaleb, K. & Prasanna, B.M. (2022) Global maize production, consumption and trade: Trends and R&D implications. Food Security, 14, 1295–1319. https://doi.org/10.1007/s12571-022-01288-7
  14. Folmer, O., Black, M., Hoeh, W., Lutz, R. & Vrijenhoek, R. (1994) DNA primers for amplification of mitochondrial cytochrome c oxidase subunit I from diverse metazoan invertebrates. Molecular Marine Biology and Biotechnology, 3, 294–299.
  15. Gilbert, M.T.P., Moore, W., Melchior, L. & Worobey, M. (2007) DNA extraction from dry museum beetles without conferring external morphological damage. PLoS ONE, 2, e272. https://doi.org/10.1371/journal.pone.0000272
  16. Hall, T.A. (1999) BioEdit: a user-friendly biological sequence alignment editor and analysis program for Windows 95/98/NT. Nucleic Acids Symposium Series, 41, 95–98.
  17. Hasegawa, M., Kishino, H. & Yano, T.-A. (1985) Dating of the human–ape splitting by a molecular clock of mitochondrial DNA. Journal of Molecular Evolution, 22, 160–174. https://doi.org/10.1007/BF02101694
  18. Hodges, R.J., Dunstan, W.R., Magazini, I. & Golob, P. (1983) An outbreak of Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae) in East Africa. Protection Ecology, 5, 183–194.
  19. Kirkendall, L.R. (2018) Invasive bark beetles (Coleoptera, Curculionidae, Scolytinae) in Chile and Argentina, including two species new for South America, and the correct identity of the Orthotomicus species in Chile and Argentina. Diversity, 10, 40. https://doi.org/10.3390/d10020040
  20. Kirkendall, L.R. & Faccoli, M. (2010) Bark beetles and pinhole borers (Curculionidae, Scolytinae, Platypodinae) alien to Europe. ZooKeys, 56, 227–251. https://doi.org/10.3897/zookeys.56.529
  21. Kumar, D. & Kalita, P. (2017) Reducing postharvest losses during storage of grain crops to strengthen food security in developing countries. Foods, 6, 8. https://doi.org/10.3390/foods6010008
  22. López-Castillo, L.M., Silva-Fernández, S.E., Winkler, R., Bergvinson, D.J., Arnason, J.T. & García-Lara, S. (2018) Postharvest insect resistance in maize. Journal of Stored Products Research, 77, 66–76. https://doi.org/10.1016/j.jspr.2018.03.004
  23. Marchioro, M., Besana, L., Rossini, M., Vallotto, D., Ruzzier, E. & Faccoli, M. (2024) The first host plant dataset of Curculionidae Scolytinae of the world: miscellaneous tribes (Part 2). Scientific Data, 11, 1217. https://doi.org/10.1038/s41597-024-02977-y
  24. Mercado, J.E. (2010) Bark beetle genera of the United States. Colorado State University, USDA-APHIS-PPQ Center for Plant Health Science and Technology, and USDA-FS Rocky Mountain Research Station. Available from: https://idtools.org/bbgus/ (accessed 30 January 2026)
  25. Miller, S.A., Dykes, D.D. & Polesky, H.F. (1988) A simple salting-out procedure for extracting DNA from human nucleated cells. Nucleic Acids Research, 16, 1215. https://doi.org/10.1093/nar/16.3.1215
  26. Mutambuki, K. & Likhayo, P. (2021) Efficacy of different hermetic bag storage technologies against insect pests and aflatoxin incidence in stored maize grain. Bulletin of Entomological Research, 111, 499–510. https://doi.org/10.1017/S0007485321000213
  27. Mutambuki, K., Affognon, H., Likhayo, P. & Baributsa, D. (2019) Evaluation of Purdue Improved Crop Storage triple layer hermetic storage bag against Prostephanus truncatus (Horn) and Sitophilus zeamais (Motschulsky). Insects, 10, 204. https://doi.org/10.3390/insects10070204
  28. Neupane, D., Adhikari, P., Bhattarai, D., Rana, B., Ahmed, Z., Sharma, U. & Adhikari, D. (2022) Does climate change affect the yield of the top three cereals and food security in the world? Earth, 3, 45–71. https://doi.org/10.3390/earth3010004
  29. Smith, S.M. & Cognato, A.I. (2021) A revision of the Neotropical genus Coptoborus Hopkins (Coleoptera, Curculionidae, Scolytinae, Xyleborini). ZooKeys, 1044, 609–720. https://doi.org/10.3897/zookeys.144.62246
  30. Sori, W. (2014) Effect of selected botanicals and local seed storage practices on maize insect pests and health of maize seeds in Jimma Zone. Singapore Journal of Scientific Research, 4, 19–28. https://doi.org/10.3923/sjsres.2014.19.28
  31. Stathers, T.E., Arnold, S.E., Rumney, C.J. & Hopson, C. (2020) Measuring the nutritional cost of insect infestation of stored maize and cowpea. Food Security, 12, 285–308. https://doi.org/10.1007/s12571-019-00997-w
  32. Tamura, K., Stecher, G. & Kumar, S. (2021) MEGA11: Molecular evolutionary genetics analysis version 11. Molecular Biology and Evolution, 38, 3022–3027. https://doi.org/10.1093/molbev/msab120

How to Cite

Chidege, M.Y., Ndakidemi, P.A. & Venkataramana, P.B. (2026) First record of Pagiocerus frontalis (Fabricius) (Coleoptera: Curculionidae: Scolytinae) in stored maize in Africa. Zootaxa, 5793 (1), 184–192. https://doi.org/10.11646/zootaxa.5793.1.8