Geographic distribution of the African root and tuber scale (Stictococcus vayssierei) in Central Africa

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 andtuber scale was present in Cameroon, Central African Republic, Congo, DemocraticRepublic of Congo, Equatorial Guinea, Gabon and Uganda. It was not found on the sites sur-veyed in Chad and Nigeria. The pest occurred in the forest and the forest-savannah mosaic aswell as in the savannah where it was never recorded before. However, prevalence was higher inthe 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 pestwas prevalent in all but two ecological regions: the Congolian swamp forests and the SouthernCongolian forest-savanna mosaic. In the savannah habitat, it was restricted to the moist savan-nah 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 antAnoplolepistenella. High densities (>1000 scales per plant) were recorded along the Cameroon–Gabonborder. Good regulatory measures within and between countries are required to control theexchange of plant materials and limit its spread. The study provides information for nichemodeling and risk mapping.


Data and Resources

Additional Info

Field Value
Creator Doumtsop, Armand
Creator Affiliation International Institute of Tropical Agriculture (IITA)
Creator ID Type ORCID
Creator ID 0000-0001-7070-8440
Subject Vocab (AGROVOC/GACS/CAB) Ant,Insect,Cocoyam,Cassava,Yam,Groundnut,Scale insects,Stictococcus vayssierei,Anoplolepis tenella,Root,Tuber,Taro
Subject(s) Anoplolepis tenella,Niche modelling
Publisher International Institute of Tropical Agriculture (IITA)
Contributor Person Rachid Hanna, Maurice Tindo, Wily K Tata-Hangy, Apollin K. Fotso, Komi K.M. Fiaboe, Abraham Fomena, Adolph Kemga, Benjamin B. Normark
Contributor Role Other
Contributor Project Lead Organisation Center International Institute of Tropical Agriculture (IITA)
Contributor Project Lead Center International Institute of Tropical Agriculture (IITA)
Contributor CRP CGIAR Research Program on Roots, Tubers and Banana(RTB)
Contributor Partner
Contributor Donor IITA/Core, International Fund for Agricultural Development (IFAD), United States Agency for International Development (USAID), Borlaug-LEAP fellowship
Contributor Project Biology and management of the African root and tuber scale
Project ID
Contributor Affiliation International Institute of Tropical Agriculture (IITA)
Open-Access status Open Access
Production Date 2015-12-21
Embargo End Date
Content Type Dataset
File Format csv
Identifier Type DOI
Identifier Citation Doumtsop Fotio A.R. P.; R. Hanna; M. Tindo; W.K. Tata-Hangy; A.K. Fotso; K.K. M. Fiaboe; A. Fomena; B.B. Normark (In Press) 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. Bulletin of Entomological Research
Source Biology and management of the African root and tuber scale
Language English
Relation Not applicable
Agroecological Zone Humid warm tropics
Coverage Region Sub-Saharan Africa
Coverage country Cameroon,Central African Republic,Chad,Congo,Democratic Republic of Congo,Equatorial Guinea,Gabon,Nigeria,Uganda
Coverage Admin Unit Not applicable
Coverage Y (Latitude) 7.36972, 6.61111, 15.45417, -0.22802, -4.03833, 1.65080, -0.80369, 9.08200, 1.37333
Coverage X (Longitude) 12.35472, 20.93944, 18.73221, 15.82766, 21.75866, 10.26790, 11.60944, 8.67528, 32.29028
Coverage Start Date 2004-29-06
Coverage End Date 2015-12-21
Contact Doumtsop, Armand; International Institute of Tropical Agriculture (IITA)
Contact Email;
Restriction CC-BY 4.0
Email Permission None
Rights CC-BY 4.0