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The Biological Control of Cassava Mealybug in Africa

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  • Richard B. Norgaard

Abstract

Cassava, brought from South America 300 years ago free of its pests, became a major subsistence crop in Africa. A mealybug was mistakenly introduced in the early 1970s. By the 1980s the mealybug was a major pest. The International Institute of Tropical Agriculture found a parasitic wasp in South America and reared and released it in Africa. Conservatively estimated, the benefit-cost ratio for this program is 149 to 1. This success indicates that biological control can play an important role in pest management.

Suggested Citation

  • Richard B. Norgaard, 1988. "The Biological Control of Cassava Mealybug in Africa," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 70(2), pages 366-371.
    • Handle: RePEc:oup:ajagec:v:70:y:1988:i:2:p:366-371.
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    File URL: http://hdl.handle.net/10.2307/1242077
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    1. Asa Giertz & George Gray & Mohinder S. Mudahar & Rhoda Rubaiza & Diana Galperin & Kilara Suit, 2015. "Rwanda Agricultural Sector Risk Assessment," World Bank Publications - Reports 22936, The World Bank Group.
    2. Boughton, Duncan & Frahan, Bruno Henry de, 1994. "Agricultural Research Impact Assessment: The Case of Maize Technology Adoption in Southern Mali," Food Security International Development Working Papers 54729, Michigan State University, Department of Agricultural, Food, and Resource Economics.
    3. Mywish K. Maredia & David Anthony Raitzer, 2010. "Estimating overall returns to international agricultural research in Africa through benefit‐cost analysis: a “best‐evidence” approach," Agricultural Economics, International Association of Agricultural Economists, vol. 41(1), pages 81-100, January.
    4. Midingoyi, Soul-kifouly & Hippolyte, Affognon & Georges, Ong'amo & Bruno, LeRu, 2015. "Economic Welfare Change Attributable to Biological Control of Lepidopteran Cereal Stemborer Pests in East and Southern Africa: Cases of Maize and Sorghum in Kenya, Mozambique and Zambia," 2015 Conference, August 9-14, 2015, Milan, Italy 212461, International Association of Agricultural Economists.
    5. Davis, Rex, 1997. "A Review of Economic Evaluations of Government Policies for the Control of Cattle Tick," Animal Health Economics 164583, University of Queensland, School of Economics.
    6. Tonnang, Henri E.Z. & Hervé, Bisseleua D.B. & Biber-Freudenberger, Lisa & Salifu, Daisy & Subramanian, Sevgan & Ngowi, Valentine B. & Guimapi, Ritter Y.A. & Anani, Bruce & Kakmeni, Francois M.M. & Aff, 2017. "Advances in crop insect modelling methods—Towards a whole system approach," Ecological Modelling, Elsevier, vol. 354(C), pages 88-103.
    7. Haggblade, Steven & Staaz, John & Boughton, Duncan & Diallo, Boubacar & Meyer, Ferdinand & Minde, Issac Joseph & Traub, Lulama Ndibongo & Tschirley, David, 2015. "Regional Dimensions of South Africa's CAADP Process: Lessons from West Africa," African Journal of Agricultural and Resource Economics, African Association of Agricultural Economists, vol. 10(1), pages 1-19, March.
    8. Nweke, Felix, 2004. "New challenges in the cassava transformation in Nigeria and Ghana:," EPTD discussion papers 118, International Food Policy Research Institute (IFPRI).
    9. Nweke, Felix, 2009. "Controlling cassava mosaic virus and cassava mealybug in Sub-Saharan Africa:," IFPRI discussion papers 912, International Food Policy Research Institute (IFPRI).
    10. De Groote, H. & Ajuonu, O. & Attignon, S. & Djessou, R. & Neuenschwander, P., 2003. "Economic impact of biological control of water hyacinth in Southern Benin," Ecological Economics, Elsevier, vol. 45(1), pages 105-117, April.
    11. Doeleman, Jacobus A., 1989. "Biological Control of Salvinia molesta in Sri Lanka: An Assessment of Costs and Benefits," Technical Reports 113874, Australian Centre for International Agricultural Research.
    12. Zeddies, J. & Schaab, R. P. & Neuenschwander, P. & Herren, H. R., 2000. "Economics of biological control of cassava mealybug in Africa," Agricultural Economics, Blackwell, vol. 24(2), pages 209-219, January.
    13. Spencer, Dunstan S.C. & Badiane, Ousmane, 1995. "Agriculture and Economic Recovery in African Countries," 1994 Conference, August 22-29, 1994, Harare, Zimbabwe 183375, International Association of Agricultural Economists.

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