Genetic diversity of whitefly (Bemisia spp.) on crop and uncultivated plants in Uganda: implications for the control of this devastating pest species complex in Africa

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dc.contributor.authorMugerwa, Habibu
dc.contributor.authorColvin, John
dc.contributor.authorAlicai, Titus
dc.contributor.authorOmongo, Christopher A.
dc.contributor.authorKabaalu, Richard
dc.contributor.authorVisendi, Paul
dc.contributor.authorSseruwagi, Peter
dc.contributor.authorSeal, Susan E.
dc.date.accessioned2022-06-24T10:03:42Z
dc.date.available2022-06-24T10:03:42Z
dc.date.issued2021
dc.description.abstractOver the past three decades, highly increased whitefly (Bemisia tabaci) populations have been observed on the staple food crop cassava in eastern Africa and associated with ensuing viral disease pandemics and food insecurity. Increased whitefly numbers have also been observed in other key agricultural crops and weeds. Factors behind the population surges on different crops and their interrelationships are unclear, although in cassava they have been associated with specific populations within the Bemisia tabaci species complex known to infest cassava crops in Africa. This study carried out an in-depth survey to understand the distribution of B. tabaci populations infesting crops and uncultivated plant hosts in Uganda, a centre of origin for this pest complex. Whitefly samples were collected from 59 identified plant species and 25 unidentified weeds in a countrywide survey. Identities of 870 individual adult whiteflies were determined through mitochondrial cytochrome oxidase 1 sequences (651 bp) in the 3′ barcode region used for B. tabaci systematics. Sixteen B. tabaci and five related whitefly putative species were identified based on > 4.0% nucleotide divergence, of which three are proposed as novel B. tabaci putative species and four as novel closely related whitefly species. The most prevalent whiteflies were classified as B. tabaci MED-ASL (30.5% of samples), sub-Saharan Africa 1 (SSA1, 22.7%) and Bemisia Uganda1 (12.1%). These species were also indicated to be the most polyphagous occurring on 33, 40 and 25 identified plant species, respectively. Multiple (≥ 3) whitefly species occurred on specific crops (bean, eggplant, pumpkin and tomato) and weeds (Sida acuta and Ocimum gratissimum). These plants may have increased potential to act as reservoirs for mixed infections of whitefly-vectored viruses. Management of whitefly pest populations in eastern Africa will require an integration of approaches that consider their degree of polyphagy and a climate that enables the continuous presence of crop and uncultivated plant hosts.en_US
dc.identifier.citationMugerwa, H., Colvin, J., Alicai, T., Omongo, C. A., Kabaalu, R., Visendi, P., ... & Seal, S. E. (2021). Genetic diversity of whitefly (Bemisia spp.) on crop and uncultivated plants in Uganda: Implications for the control of this devastating pest species complex in Africa. Journal of pest science, 94(4), 1307-1330. https://doi.org/10.1007/s10340-021-01355-6en_US
dc.identifier.urihttps://doi.org/10.1007/s10340-021-01355-6
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/4074
dc.language.isoenen_US
dc.publisherJournal of pest scienceen_US
dc.subjectWhiteflyen_US
dc.subjectBemisia tabacien_US
dc.subjectMtCO1en_US
dc.subjectGenetic diversityen_US
dc.subjectHost rangeen_US
dc.subjectEast Africaen_US
dc.titleGenetic diversity of whitefly (Bemisia spp.) on crop and uncultivated plants in Uganda: implications for the control of this devastating pest species complex in Africaen_US
dc.typeArticleen_US
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