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Cassava whitefly species in eastern Nigeria and the threat of vector-borne pandemics from East and Central Africa. | LitMetric

AI Article Synopsis

  • Bemisia tabaci is a group of over 40 whitefly species that are significant agricultural pests and virus carriers, with one species (SSA1) linked to serious cassava diseases in East and Central Africa.
  • A survey conducted in eastern Nigeria revealed the presence of SSA1 and several haplotypes of other B. tabaci species, but SSA1 was not found in high numbers typical of the regions where cassava diseases are rampant.
  • No severe symptoms of cassava mosaic disease (CMD) or cassava brown streak disease (CBSD) were observed in eastern Nigeria, suggesting a lower current risk compared to the affected areas in East and Central Africa.

Article Abstract

Bemisia tabaci (sensu latu) is a group of >40 highly cryptic whitefly species that are of global agricultural importance, both as crop pests and plant-virus vectors. Two devastating cassava diseases in East and Central Africa are spread by abundant populations of one of these species termed Sub-Saharan Africa 1 (SSA1). There is a substantive risk that these whitefly-borne pandemics will continue to spread westwards and disrupt cassava production for millions of smallholder farmers in West Africa. We report here, therefore, the first comprehensive survey of cassava B. tabaci in eastern Nigeria, a West African region likely to be the first affected by the arrival of these whitefly-borne pandemics. We found one haplotype comprising 32 individuals with 100% identical mtCO1 sequence to the East African SSA1 populations (previously termed SSA1-SG1) and 19 mtCO1 haplotypes of Sub-Saharan Africa 3 (SSA3), the latter being the most prevalent and widely distributed B. tabaci species in eastern Nigeria. A more divergent SSA1 mtCO1 sequence (previously termed SSA1-SG5) was also identified in the region, as were mtCO1 sequences identifying the presence of the MED ASL B. tabaci species and Bemisia afer. Although B. tabaci SSA1 was found in eastern Nigeria, they were not present in the high abundances associated with the cassava mosaic (CMD) and cassava brown streak disease (CBSD) pandemics of East and Central Africa. Also, no severe CMD or any CBSD symptoms were found in the region.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7205266PMC
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0232616PLOS

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