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Maximising yield benefits from dual-purpose cowpea

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Abstract

Cowpea (Vigna unguiculata [L.] Walp.) is consumed by many subsistence farmers across the African continent as a cheap source of quality protein. Harvest of cowpea leaves as a vegetable as well as grain from the same plant (dual-purpose) is a primary goal for farmers, which allows them to exploit the nutritional benefits of both. The leaves are consumed in a variety of traditional dishes, or dried for use in the dry season. However, leaf harvest practices by farmers are among the leading causes of poor grain yield and quality. These negative effects can extend to reduction in other benefits of cowpeas such as nitrogen fixation and soil organic matter improvement. This paper critically reviews the effects of leaf harvesting practices on cowpea crops and options available to subsistence farmers to mitigate the negative effects. Recommendations on appropriate timing, duration and intensity of leaf harvesting are then provided, together with agronomic strategies for maximising benefits. Information gaps are also highlighted with the aim of guiding future research programmes for the improvement of the food productivity of cowpea.

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References

  • Adeyemi, S. A., Lewu, F. B., Adebola, P. O., Bradley, G., & Okoh, A. I. (2012). Protein content variation in cowpea genotypes (Vigna unguiculata L. Walp.) grown in the Eastern Cape province of South Africa as affected by mineralised goat manure. African Journal of Agricultural Research, 7(35), 4943–4947.

    Google Scholar 

  • Adipala, E., Nampala, P., Karugi, J., & Isubikalu, P. (2000). A review on options for management of cowpea pests: experiences from Uganda. Integrated Pest Management Review, 5(3), 185–196.

    Article  Google Scholar 

  • Agbogidi, O. M., & Egho, E. O. (2012). Evaluation of eight varieties of cowpea (Vigna unguiculata (L.) Walp) in Asaba agro-ecological environment, Delta State, Nigeria. Basic Research Journal of Agricultural Science and Review, 1(3), 63–68.

    Google Scholar 

  • Ahenkora, K., Dapaah, H. A., & Agyemang, A. (1998). Selected nutritional components and sensory attributes of cowpea (Vigna unguiculata [L.] Walp.) leaves. Plant Foods for Human Nutrition, 52(3), 221–229.

    Article  PubMed  CAS  Google Scholar 

  • Akyeampong, E. (1986). Some responses of cowpea to drought stress. In Potentials of forage legumes in farming systems of sub-Saharan Africa: Proceedings of a workshop held at ILCA, Addis Ababa, Ethiopia, 16–19 September 1985 (p. 141). ILRI (aka ILCA and ILRAD).

  • Argall, J. F., & Stewart, K. A. (1984). Effects of decapitation and benzyladenine on growth and yield of cowpea (Vigna unguiculata [L.] Walp.). Annals of Botany, 54(3), 439–444.

    CAS  Google Scholar 

  • Asante, S., Tamo, M., & Jackai, L. (2001). Integrated management of cowpea insect pests using elite cultivars, date of planting and minimum insecticide application. African Crop Science Journal, 9(4), 655–665.

    Article  Google Scholar 

  • Attah, E. S., Kalu, B. A., & Adeyemo, M. O. (2004). Effect of cultivar and plant population on the yield of cowpea (Vigna unguiculata [L.] Walp.) in Southern Guinea Savanna Zone of Nigeria. Journal of Sustainable Agriculture and the Environment, 6, 112–119.

    Google Scholar 

  • Barret, R. P. (1987). Integrating leaf and seed production strategies for cowpea (Vigna unguiculata [L.] Walp.). MS Thesis. Michigan State University, East Lansing, MI, USA.

  • Bittenbender, H. C., Barrett, R. P., & Indire-Lavusa, B. M. (1984). Beans and cowpeas as leaf vegetables and grain legumes. Bean/Cowpea CRSP, Michigan State University.

  • Bubenheim, D. L., Mitchell, C. A., & Nielsen, S. S. (1990). Utility of cowpea foliage in a crop production system for space. In J. Janick & J. E. Simon (Eds.), Advances in new crops. Portland: Timber Press.

    Google Scholar 

  • Chikowo, R., Mapfumo, P., Nyamugafata, P., & Giller, K. E. (2004). Woody legume fallow productivity, biological N2-fixation and residual benefits to two successive maize crops in Zimbabwe. Plant and Soil, 262(1–2), 303–315.

    Article  CAS  Google Scholar 

  • Cisse, N., & Hall, A. E. (2002). Traditional cowpea in Senegal, a case study. A Report for the Food and Agriculture Organization (FAO), Rome, Italy.

  • Conroy, A. C., Blackie, M. J., Whiteside, A., Malewezi, J. C., & Sachs, J. D. (2006). Poverty, AIDS and hunger: Breaking the poverty trap in Malawi. Basingstoke and New York: Palgrave Macmillan. 251 pp.

    Book  Google Scholar 

  • Dadson, R. B., Hashem, F. M., Javaid, I., Joshi, J., Allen, A. L., & Devine, T. E. (2005). Effect of water stress on the yield of cowpea (Vigna unguiculata [L.] Walp.) genotypes in the delmarva region of the United States. Journal of Agronomy and Crop Science, 191(3), 210–217.

    Article  Google Scholar 

  • Department of Agriculture, Forestry and Fisheries. (2011). Production guideline for cowpeas. Directorate of Agricultural Information Services, Private Bag X144, Pretoria, South Africa. http://www.nda.agric.za/docs/Brochures/ProdguideCowpea.pdf. Accessed 16 September 2013.

  • Dixon, J. A., Gibbon, D. P., & Gulliver, A. (2001). Farming systems and poverty: Improving farmers’ livelihoods in a changing world. FAO.

  • Dovlo, F. E., Williams, C. E., & Zoaka, L. (1976). Cowpea: Home preparation and use in West Africa. Publication IDRC-055e. International Development Research Centre, Ottawa, Canada.

  • Dube, E. (2007). Studies on options to mitigate the negative impacts of leaf harvesting on cowpea. MSc Thesis. University of Zimbabwe, Harare.

  • Duncan, R. R., & Gardner, W. A. (1984). The influence of ratoon cropping on sweet sorghum yield, sugar production, and insect damage. Canadian Journal of Plant Science, 64, 261–273.

    Article  Google Scholar 

  • Ezedinma, F. O. C. (1973). Effects of defoliation and topping on semi-upright cowpeas [Vigna Unguiculata (L.) Walp.] in a humid tropical environment. Experimental Agriculture, 9, 203–207.

    Article  Google Scholar 

  • FAO (Food and Agriculture organization). (1984). Legume inoculants and their use. Rome: FAO.

    Google Scholar 

  • Graham, P. H., & Vance, C. P. (2003). Legumes: importance and constraints to greater use. Plant Physiology, 131, 872–877.

    Article  PubMed  CAS  PubMed Central  Google Scholar 

  • Hallensleben, M., Polreich, S., Heller, J., & Maass, B. L. (2009). Assessment of the importance and utilization of cowpea (Vigna unguiculata L. Walp.) as leafy vegetable in small-scale farm households in Tanzania–East Africa. In Conference on International Research on Food Security, Natural Resource Management and Rural Development, University of Hamburg. Tropentag, 6–8 October 2009.

  • Ibrahim, U., Auwalu, B. M., & Udom, G. N. (2010). Effect of stage and intensity of defoliation on the performance of vegetable cowpea (Vigna unguiculata L. Walp). African Journal of Agricultural Research, 5(18), 2446–2451.

    Google Scholar 

  • Ingram, J. A., & Swift, M. J. (1990). Sustainability of cereal-legume intercrops in relation to management of soil organic matter and nutrient cycling. In S. R. Waddington, A. F. E. Palmer, O. T. Edje (Eds.), Research methods for cereal legume intercropping: Proceedings of a workshop on research methods on cereal legume intercropping in Eastern and Southern Africa. CIMMYT. pp 201–209.

  • Kolawole, G. O., Tinan, G., & Singh, B. B. (2002). Differential response of cowpea lines to application of P fertilizer. In C. A. Fatokun, S. A. Tarawali, B. B. Singh, P. M. Kormawa, & M. Tamo (Eds.), Challenges and opportunities for enhancing sustainable cowpea production (pp. 319–328). Ibadan: International Institute of Tropical Agriculture (IITA).

    Google Scholar 

  • Kwapata, M. B., & Hall, A. E. (1990). Response of contrasting vegetable-cowpea cultivars to plant density and harvesting of green pods. Field Crops Research, 24(1–2), 1–10.

    Article  Google Scholar 

  • Li, X., An, P., Inanaga, S., Egrinya Eneji, A., & Ali, A. M. (2005). Mechanisms promoting recovery from defoliation in determinate and indeterminate soybean cultivars. International Journal of Food, Agriculture and Environment, 3(3–4), 178–183.

    Google Scholar 

  • Madamba, R. (2000). Evaluating leaf, grain yield and nutritive value of leaves of different cowpea varieties. Department of Research and Specialist Services. Crop Breeding Institute. Box CY550. Causeway, Harare, Zimbabwe.

  • Madodé, Y. E., Houssou, P. A., Linnemann, A. R., Hounhouigan, D. J., Nout, M. J. R., & Van Boekel, M. A. J. S. (2011). Preparation, consumption, and nutritional composition of West African cowpea dishes. Ecology of food and nutrition, 50(2), 115–136.

    Article  PubMed  Google Scholar 

  • Makoi, J. H. J. R., Belane, A. K., Chimphango, S. B. M., & Dakora, F. D. (2010). Seed flavonoids and anthocyanins as markers of enhanced plant defence in nodulated cowpea (Vigna unguiculata L. Walp.). Field Crops Research, 118, 21–27.

    Article  Google Scholar 

  • Malone, S. M. (2001). Assessment of soybean leaf area for redefining management strategies for leaf-feeding insects. Doctoral dissertation, Virginia Tech.

  • Mamiro, P. S., Mbwaga, A. M., Mamiro, D. P., Mwanri, A. W., & Kinabo, J. L. (2011). Nutritional quality and utilization of local and improved cowpea varieties in some regions in Tanzania. African Journal of Food Agriculture Nutrition and Development, 11(1), 4490–4506.

    Article  CAS  Google Scholar 

  • Matikiti, A., Chikwambi, Z., Nyakanda, C., & Mashingaidze, A. B. (2012). Nodulation, leaf harvesting intensity and interval of the black-eyed bean (BEB) (Vigna unguiculata L. Walpers) cowpea type at the University of Zimbabwe, Harare, Zimbabwe. African Journal of Agricultural Research, 7(39), 5421–5429.

    Google Scholar 

  • Mehta, P. N. (1971). The effect of defoliation on seed yield of cowpeas and analysis of the leaf harvest for dry matter and nitrogen content. Acta Horticulturae, 21, 167–172.

    Google Scholar 

  • Muleba, N., & Coulibaly, M. (1999). Effects of phosphorus fertilizer sources on cowpea and subsequent cereal crop productivity in semi-arid West Africa. The Journal of Agricultural Science, 132(1), 45–60.

    Article  CAS  Google Scholar 

  • National Research Council. (2006). Lost crops of Africa. Vegetables, volume II. Washington, D.C.: The National Academies Press.

    Google Scholar 

  • Nawiri, M. P., Nyambaka, H., & Murungi, J. I. (2013). Sun-dried cowpeas and amaranth leaves recipe improves β-carotene and retinol levels in serum and haemoglobin concentration among preschool children. European journal of nutrition, 52(2), 583–589.

    Article  PubMed  CAS  Google Scholar 

  • Nielsen, S. S., Ohler, T. A., & Mitchell, C. A. (1997). Cowpea leaves for human consumption: production, utilization, and nutrient composition. In B. B. Singh, D. R. Mohan Raj, K. E. Dashiell, & L. E. N. Jackai (Eds.), Advances in cowpea research (pp. 326–332). Ibadan: Co-publication of International Institute of Tropical Agriculture (IITA) and Japan International Research Centre for Agriculture Sciences (JIRCAS).

    Google Scholar 

  • Nowak, R. S., & Caldwell, M. M. (1984). A test of compensatory photosynthesis in the field. Implications for herbivory tolerance. Oecologia, 61, 311–315.

    Article  Google Scholar 

  • Nyakanda, C., Mashingaidze, A. B., Matikiti, A., & Nehanda, G. (2004). Studies on the effects of picking leaves for use as vegetable on black eye bean yield and product quality. Harare: VECO, ACFD and University of Zimbabwe.

    Google Scholar 

  • Ohler, T. A., Nielsen, S. S., & Mitchell, C. A. (1996). Varying plant density and harvest time to optimise cowpea leaf yield and nutrient content. HortScience, 31(2), 193–197.

    PubMed  CAS  Google Scholar 

  • Olayinka, A., Adetunji, A., & Adebayo, A. (1998). Effect of organic amendments on nodulation and nitrogen fixation by cowpea. Journal of Plant Nutrition, 21(11), 2455–2464.

    Article  CAS  Google Scholar 

  • Paré, P. W., & Tumlinson, J. H. (1999). Plant volatiles as a defense against insect herbivores. Plant Physiology, 121(2), 325–332.

    Article  PubMed  PubMed Central  Google Scholar 

  • Power, A. G. (1987). Plant community diversity, herbivore movement, and an insect-transmitted disease of maize. Ecology, 68(6), 1658–1669.

    Article  Google Scholar 

  • Saidi, M., Itulya, F. M., & Aguyoh, J. N. (2010). Effects of cowpea leaf harvesting initiation time and frequency on tissue nitrogen content and productivity of a dual-purpose cowpea–maize intercrop. HortScience, 45(3), 369–375.

    Google Scholar 

  • Saria, J. E. (2010). Enhancing cowpea (Vigna unguiculata [L.] Walp.) production through insect pest resistant line in East Africa. PhD Thesis, University of Copenhagen, Denmark, 99 pp. http://curis.ku.dk/ws/files/32439416/John_E._Sariah_PhD_Thesis_LC_2728.pdf. Accessed 16 September 2013.

  • Scheuring, D. C., Miller, J. C., & Walker, D. W. (1990). Evaluation of cowpea ratooning potential. HortScience, 25(8), 860.

    Google Scholar 

  • Singh, B. B, & Emechebe, A. M. (1998). Increasing productivity of millet-cowpea intercropping systems, p. 88–95. In A. M. Emechebe, M. C. Ikwelle, O. Ajayi, M. Amino Kano, A. B. Anosa (Eds.), Pearl millet in Nigeria agriculture: Production, utilization and research priorities. Proc. of the Pre-season Planning Meeting for the Nationally Coordinated Research Programme for Pearl Millet, Maidiguri, 21–24 April 1997. Lake Chad Research Institute, Maiduguri, Nigeria.

  • Singh, B. B., Chambliss, O. L., & Sharma, B. (1997). Recent advances in cowpea breeding. In B. B. Singh, D. R. Mohan Raj, K. E. Dashiell, & L. E. N. Jackai (Eds.), Advances in cowpea research (pp. 30–49). Ibadan: Co-publication of International Institute of Tropical Agriculture (IITA) and Japan International Research Center for Agriculture Sciences (JIRCAS).

    Google Scholar 

  • Singh, B. B., Ajeigbe, H. A., Tarawali, S. A., Fernandez-Rivera, S., & Abubakar, M. (2003). Improving the production and utilization of cowpea as food and fodder. Field Crops Research, 84(1), 169–177.

    Article  Google Scholar 

  • Smith, F. I., & Eyzaguirre, P. (2007). African leafy vegetables: their role in the world health organization’s global fruit and vegetables initiative. African Journal of Food Agriculture Nutrition and Development, 7(3), 1–17.

    Google Scholar 

  • Snapp, S. S., Blackie, M. J., Gilbert, R. A., Bezner-Kerrd, R., & Kanyama-Phirie, G. Y. (2010). Biodiversity can support a greener revolution in Africa. PNAS, 107, 20840–20845. doi:10.1073/pnas.1007199107.

    Article  PubMed  CAS  PubMed Central  Google Scholar 

  • Stewart, K. A., Summerfield, R. J., & Ndunguru, B. J. (1978). Effects of source-sink manipulations on seed yield of cowpea. I. Defoliation. Tropical Agriculture, 55, 118–125.

    Google Scholar 

  • Strauss, S. Y., & Agrawal, A. A. (1999). The ecology and evolution of plant tolerance for herbivory. Trends Ecology, 14, 179–185.

    Article  Google Scholar 

  • Thompson, J. P., & Wildermuth, G. B. (1989). Colonization of crop and pasture species with vesicular-arbuscular mycorrhizal fungi and negative correlation with root infection by Bipolaris sorokiniana. Canadian Journal of Botany, 67, 687–693.

    Article  Google Scholar 

  • Thuita, M. N., Okalebo, J. R., Othieno, C. O., Kipsat, M. J., & Nekesa, A. O. (2011). Economic returns of the “MBILI” intercropping compared to conventional systems in western Kenya. In A. Bationo, B. Waswa, J.M. Okeyo, F. Maina, & J.M. Kihara (Eds.), Innovations as key to the green revolution in Africa, doi:10.1007/978-90-481-2543-2_104. Springer Science and Business Media, pp 1023–1033.

  • White, J., & Harper, J. L. (1970). Correlated changes in plant size and number in plant populations. Journal of Ecology, 58(2), 467–485.

    Article  Google Scholar 

  • Whitham, T. G., & Paige, K. N. (1991). Plant responses to herbivory: The continuum from negative to positive and underlying physiological mechanisms. In P. W. Price (Ed.), Plant animal interactions: Evolutionary ecology in tropical and temperate regions (pp. 227–256). New York: Wiley.

    Google Scholar 

  • Woomer, P. L., Bekunda, M. A., Karanja, N. K., Moorehouse, T., & Okalebo, J. R. (1997). Agricultural resource management by smallholder farmers in East Africa. Nature and Resources, 34(4), 22–33.

    Google Scholar 

  • Woomer, P. L., Lan’gat, M., & Tungani, J. O. (2004). Innovative Maize-legume intercropping results in above- and below-ground competitive advantages for understory legumes. West African Journal of Applied Ecology, 6, 85–94.

    Google Scholar 

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Acknowledgments

The authors would like to thank the University of Zimbabwe Crop Science Department staff for providing technical assistance to this study. Dr Chris Nyakanda gave valuable guidance and assistance with initiation of the Cowpea (Black Eye Bean) project from which this study emerged. RUFORUM is highly acknowledged for providing financial support to this work. The authors also thank the anonymous reviewers, whose comments were valuable in improving this paper.

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  1. ARC - Small Grain Institute, Private Bag X29, Bethlehem, South Africa

    E. Dube

  2. Department of Agriculture, Cape Peninsula University of Technology, Private Bag X8, Wellington, 7654, South Africa

    M. Fanadzo

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Dube, E., Fanadzo, M. Maximising yield benefits from dual-purpose cowpea. Food Sec. 5, 769–779 (2013). https://doi.org/10.1007/s12571-013-0307-3

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