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Relationships of intercropped maize, stem borer damage to maize yield and land-use efficiency in the humid forest of Cameroon

  • A. Chabi-Olaye (a1) (a2), C. Nolte (a2), F. Schulthess (a3) and C. Borgemeister (a1) (a3)


Stem borers are the most important maize pests in the humid forest zone of Cameroon. Field trials were conducted in the long and short rainy seasons of 2002 and 2003 to assess the level of damage and yield reductions caused by stem borers in monocropped maize and in maize intercropped with non-host plants such as cassava, cowpea and soybean. The intercrops were planted in two spatial arrangements, i.e. alternating hills or alternating rows. All intercrops and the maize monocrop were grown with and without insecticide treatment for assessment of maize yield loss due to borer attacks. The land-use efficiency of each mixed cropping system was evaluated by comparing it with the monocrop. The temporal fluctuation of larval infestations followed the same pattern in all cropping systems, but at the early stage of plant growth, larval densities were 21.3–48.1% higher in the monocrops than in intercrops, and they tended to be higher in alternating rows than alternating hills arrangements. At harvest, however, pest densities did not significantly vary between treatments. Maize monocrops had 3.0–8.8 times more stems tunnelled and 1.3–3.1 times more cob damage than intercrops. Each percentage increase in stem tunnelling lowered maize grain yield by 1.10 and 1.84 g per plant, respectively, during the long and short rainy season in 2002, and by 5.39 and 1.41 g per plant, respectively, in 2003. Maize yield losses due to stem borer were 1.8–3.0 times higher in monocrops than in intercrops. Intercrops had generally a higher land-use efficiency than monocrops, as indicated by land-equivalent-ratios and area-time-equivalent-ratios of >1.0. Land-use efficiency was similar in both spatial arrangements. At current price levels, the net production of mixed cropping systems was economically superior to controlling stem borers with insecticide in monocropped maize. The maize–cassava intercrop yielded the highest land equivalent ratios and the highest replacement value of the intercrop. At medium intensity cropping this system is thus recommended for land-constrained poor farmers who do not use external inputs such as fertilizer and insecticides.


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Adesiyun, A.A. (1979) Effects of intercrop on frit fly, Oscinella frit, oviposition and larval survival on oats. Entomologia Experimentalis et Applicata 24, 204766.
Altieri, M.A., Letourneau, D.K. (1982) Vegetation management and biological control in agroecosystems. Crop Protection 1, 405430.
Andow, D.A. (1991) Vegetational diversity and arthropod population response. Annual Review of Entomology 36, 561586.
Baliddawa, C.W. (1985) Plant species diversity and crop pest control: an analytical review. Insect Science and Its Application 6, 479487.
Bosque-Pérez, N.A., Mareck, J.H. (1991) Effect of the stem borer Eldana saccharina Walker (Lepidoptera: Pyralidae) on the yield of maize. Bulletin of Entomological Research 81, 243247.
Cardwell, K.F., Schulthess, F., Ndemah, R. & Ngoko, Z. (1997) A systems approach to assess crop health and maize yield losses due to pests and diseases in Cameroon. Agriculture, Ecosystems and Environment 65, 3347.
Chabi-Olaye, A., Nolte, C., Schulthess, F. & Borgemeister, C. (2005a) Abundance, dispersion and parasitism of the noctuid stem borer Busseola fusca (Fuller) in maize in the humid forest zone of southern Cameroon. Bulletin of Entomological Research 95, 169177.
Chabi-Olaye, A., Nolte, C., Schulthess, F. & Borgemeister, C. (2005b) Effects of grain legumes and cover crops on maize yield and plant damage by Busseola fusca (Fuller) (Lepidoptera: Noctuidae) in the humid forest of southern Cameroon. Agriculture, Ecosystems and Environment, (in press)
Fukai, S., Trenbath, B.R. (1993) Processes determining intercrop productivity and yields of component crops. Field Crops Research 34, 247271.
Gounou, S., Schulthess, F., Shanower, T., Hammond, W.N.O., Braima, H., Cudjoe, A.R., Adjakloe, R., Antwi, K.K. & Olaleye, I. (1994) Stem and ear borers of maize in Ghana. Plant Health Management Research Monograph No. 4. International Institute of Tropical Agriculture, Ibadan, Nigeria.
Härdter, R., Horst, W.J., Schmidt, G. & Frey, E. (1991) Yields and land-use efficiency of maize–cowpea crop rotation in comparison to mixed and monocropping on an Alfisol in northern Ghana. Journal of Agronomy and Crop Science 166, 326337.
Hiebsch, C. (1978) Comparing intercrops with monocultures. pp. 187200 in Agronomic economic research on soils of the tropics, 1976–1977. Annual report, North Carolina State University, Raleigh, USA
Hiebsch, C.K., McCollum, R.E. (1987) Area time equivalency ratio: a method for evaluating the productivity of intercrops. Agronomy Journal 79, 1522.
Kaufmann, T. (1983) Behavioural biology, feeding habits and ecology of three species of maize stemborers: Eldana saccharina (Lepidoptera: Pyralidae), Sesamia calamistis and Busseola fusca (Noctuidae) in Ibadan, Nigeria, West Africa. Journal of the Georgia Entomological Society 18, 259272.
Khan, Z.R., Chiliswa, P., Ampong-Nyarko, K., Smart, L.A., Polaszek, A., Wandera, J., Mulaa, M.A. (1997) Utilization of wild gramineous plants for management of cereal stemborers in Africa. Insect Science and Its Application 17, 143150.
Kruess, A. & Tscharntke, T. (2000) Species richness and parasitism in a fragmented landscape: experiments and field studies with insects on Vicia sepium. Oecologia 122, 129137.
Litsinger, J.A. & Moody, K. (1976) Integrated pest management in multiple cropping systems 293317 inPapendick, R.I., Sanchez, P.A. (Eds) Multiple cropping, Triplett Madison, Wisconsin American Society and Agronomy.
Mason, S.C., Leihner, D.E., Vorst, J.J. & Salazar, E. (1986) Cassava–cowpea and cassava–peanut intercropping. II. Leaf area index and dry matter accumulation. Agronomy Journal 78, 4753.
Mead, R., Willey, R.W. (1980) The concept of a 'land equivalent ratio' and advantages in yield from intercropping. Experimental Agriculture 16, 217218.
Mutsaers, H.J.W., Ezumah, H.C. & Osiru, D.S.O. (1993) Cassava-based intercropping: a review. Field Crops Research 34, 431457.
Ndemah, R. (1999) Towards an integrated crop management strategy for the African stalk borer, Busseola fusca (Fuller) (Lepidoptera: Noctuidae) in maize systems in Cameroon. 136 pp. PhD thesis, University of Hannover, Germany (
Ndemah, R. & Schulthess, F. (2002) Yield of maize in relation to natural field infestations and damage by lepidopterous borers in the forest and forest/savannah transition zones of Cameroon. Insect Science and Its Application 22, 183193.
Ndemah, R., Gounou, S. & Schulthess, F. (2002) The role of wild grasses in the management of lepidopterous cereal stemborers on maize in the forest zone of Cameroon and the derived savanna of southern Benin. Bulletin of Entomological Research 92, 507519.
Ndemah, R., Schulthess, F., Poehling, H.-M. & Borgemeister, C. (2000) Species composition and seasonal dynamics of lepidopterous stem borers on maize and elephant grass, Pennisetum purpureum (Moench) (Poaceae), at two forest margin sites in Cameroon. African Entomology 8, 265272.
Ndemah, R., Schulthess, F., Korie, S., Borgemeister, C., Cardwell, K.F. (2001) Distribution, relative importance and effect of lepidopterous borers on maize yields in the forest zone and mid-altitude of Cameroon. Journal of Economic Entomology 94, 14341444.
Ofori, F., Stern, W.R. (1986) Maize/cowpea intercrop system: effect of nitrogen fertilizer on productivity and efficiency. Field Crops Research 14, 247261.
Ofori, F., Stern, W.R. (1987) The combined effects of nitrogen fertilizer and density of the legume component on production efficiency in a maize/cowpea intercrop system. Field Crops Research 16, 4352.
Okigbo, B.N., Greenland, G.J. (1976) Integrated pest management in multiple cropping systems, 63101 inPapendick, R.I., Sanchez, P.A., Triplett, G.B. (Eds) Multiple cropping Madison, Wisconsin, American Society for Agronomy.
Polaszek, A. (1998) African cereal stem borers: economic importance, taxonomy, natural enemies and control. pp. 530 CAB International in association with the ACP-EU Technical Centre for Agricultural and Rural Co-operation (CTA).
Risch, S.J., Andow, D., Altieri, M.A. (1983) Agroecosystem diversity and pest control: data, tentative conclusions, and new research directions. Environmental Entomology 12, 625629.
Root, R.B. (1973) Organisation of a plant–arthropod association in simple and diverse habitats: the fauna of collards (Brassica oleracea). Ecological Monographs 43, 95124.
SAS Institute (1997) SAS/STAT Software: Changes and enhancements, through release 6.12 North Carolina, USA, SAS Institute
Schulthess, F., Bosque-Pérez, N.A., Chabi-Olaye, A., Gounou, S., Ndemah, R. & Goergen, G. (1997) Exchanging natural enemies species of lepidopterous cereal stemborers between African regions. Insect Science and its Application 17, 97108.
Schulthess, F., Chabi-Olaye, A. & Gounou, S. (2004) Multi-trophic level interactions in a cassava–maize mixed cropping system in the humid tropics of West Africa. Bulletin of Entomological Research 94, 261272.
Sétamou, M., Schulthess, F., Bosque-Pérez, N.A., Thomas-Odjo, A. (1995) The effect of stem and cob borers on maize subjected to different nitrogen treatments. Entomologia Experimentalis et Applicata 77, 205210.
Sétamou, M., Schulthess, F., Poehling, H.-M. & Borgemeister, C. (2000) Infestations and damage of maize by Mussidia nigrivenella Ragonot (Lepidoptera: Pyralidae) in Benin, West Africa. Journal of Economic Entomology 93, 650657.
Smith, J. (1976) Influence of crop background on natural enemies of aphids on Brussels sprouts. Annals of Applied Biology 83, 1529.
Songa, J.M., Zhou, G., Overholt, W.A. (2001) Relationships of stemborer damage and plant physical conditions to maize yield in a semi-arid zone of eastern Kenya. Insect Science and its Application 21, 243249.
Southwood, T.R.E., Way, M.J. (1970) Ecological background to pest management 629 in Rabb, R.L., Guthrie, F.E (Eds) Concepts of pest management, North CarolinaState University
Thies, C. & Tscharntke, T. (1999) Landscape structure and biological control in agroecosystems. Science 285, 893895.
Van den Berg, J., Nur, A.F., & Polaszek, A. (1998) Cultural control. pp. 333347in Polaszek, A., (Ed.) Cereal stem-borers in Africa: economic importance, taxonomy, natural enemies and control. International Institute of Entomology, CAB International.
van Rensburg, J.B.J., Walters, M.C., Giliomee, J.H. (1988) Plant population and cultivar effects on yield losses caused by the maize stalk borer Busseola fusca (Lepidoptera: Noctuidae). South African Journal of Plant and Soil 5, 215218.
Vandermeer, J. (1989) The ecology of intercropping 237Cambridge, Cambridge University Press.
Way, M.J., Heathcote, G.D. (1966) Interaction of crop density of field beans, abundance of Aphis fabae Scop. virus incidence and aphid control by chemicals. Annals of Applied Biology 57, 409423.


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Relationships of intercropped maize, stem borer damage to maize yield and land-use efficiency in the humid forest of Cameroon

  • A. Chabi-Olaye (a1) (a2), C. Nolte (a2), F. Schulthess (a3) and C. Borgemeister (a1) (a3)


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