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    Geographic distribution and abundance of the Afrotropical subterranean scale insect Stictococcus vayssierei (Hemiptera: Stictococcidae), a pest of root and tuber crops in the Congo basin

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    Date
    2019
    Author
    Doumtsop, A.R.
    Hanna, R.
    Tindo, M.
    Tata-Hangy, W.K.
    Fotso, A.K.
    Fiaboe, K.K.
    Fomena, A.
    Kemga, A.
    Normark, B.B.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
    Show full item record
    Abstract/Description
    Stictococcus vayssierei is a major pest of root and tuber crops in central Africa. However, data on its ecology are lacking. Here we provide an updated estimate of its distribution with the aim of facilitating the sustainable control of its populations. Surveys conducted in nine countries encompassing 13 ecological regions around the Congo basin showed that African root and tuber scale was present in Cameroon, Central African Republic, Congo, Democratic Republic of Congo, Equatorial Guinea, Gabon and Uganda. It was not found on the sites surveyed in Chad and Nigeria. The pest occurred in the forest and the forest-savannah mosaic as well as in the savannah where it was never recorded before. However, prevalence was higher in the forest (43.1%) where cassava was the most infested crop, compared to the savannah (9.2%) where aroids (cocoyam and taro) were the most infested crops. In the forest habitat, the pest was prevalent in all but two ecological regions: the Congolian swamp forests and the Southern Congolian forest-savanna mosaic. In the savannah habitat, it was restricted to the moist savannah highlands and absent from dry savannahs. The scale was not observed below 277 m asl. Where present, the scale was frequently (87.1% of the sites) attended by the ant Anoplolepis tenella. High densities (>1000 scales per plant) were recorded along the Cameroon–Gabon border. Good regulatory measures within and between countries are required to control the exchange of plant materials and limit its spread. The study provides information for niche modeling and risk mapping.
    https://dx.doi.org/10.1017/s0007485319000658
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/6524
    Non-IITA Authors ORCID
    Rachid Hannahttps://orcid.org/0000-0002-5715-0144
    Fotso Kuate, A.https://orcid.org/0000-0002-5247-7519
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1017/s0007485319000658
    Research Themes
    PLANT PRODUCTION & HEALTH
    IITA Subjects
    Pests Of Plants
    Agrovoc Terms
    Taro; Hemiptera; Pests; Pests Of Plants; Subsaharan Africa
    Regions
    Africa; Central Africa; East Africa; West Africa
    Countries
    Cameroon; Central African Republic; Chad; Congo; Congo, Dr; Equatorial Guinea; Gabon; Nigeria; Uganda
    Journals
    Bulletin of Entomological Research
    Collections
    • Journal and Journal Articles4842
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