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Facilitating the use of alternative capsid control methods towards sustainable production of organic cocoa in Ghana

Published online by Cambridge University Press:  01 June 2007

G.K. Ayenor ,
A. Van Huis ,
D. Obeng-Ofori ,
B. Padi  and
N.G. Röling
G.K. Ayenor*
Affiliation:
USAID's Trade and Investment Program for Competitive Export Economy, Ground Floor, Codemm House, 1st Dzorwulu Crescent, West Airport, Accra PMB CT 330, Accra, Ghana
A. Van Huis
Affiliation:
Laboratory of Entomology, Wageningen University, PO Box 8031, 6700 EH, Wageningen, The Netherlands
D. Obeng-Ofori
Affiliation:
Crop Science Department, University of Ghana, Legon Accra, Ghana
B. Padi
Affiliation:
Cocoa Research Institute of Ghana, PO Box 8, New Tafo, Eastern RegionGhana
N.G. Röling
Affiliation:
Communication and Innovation Studies Group, Wageningen University, PO Box 8130, 6700 EW, Wageningen, The Netherlands
*
*E-mail: gdwinkay33@yahoo.com
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Abstract

Cocoa (Theobroma cacao L.) is an important foreign exchange earner for Ghana. However, production is constrained by a high incidence of pests and diseases. Based on farmers' needs, this study focused on the control of capsids, mainly Sahlbergella singularis Haglund and Distantiella theobroma (Distant) (both Hemiptera: Miridae). Annual crop loss caused by capsids is estimated at 25–30%. To control capsids, formal research recommends application of synthetic insecticides four times between August and December. However, farmers hardly adopt this recommendation, which they consider unsuitable for their conditions and context. Three alternative control methods were tested with farmers: mass trapping, using sex pheromones; applying crude aqueous neem Azadirachta indica A. Juss. (Meliaceae) seed extract (ANSE) and using the predatory ant Oecophylla longinoda Latreille (Hymenoptera: Formicidae) as a biological control agent. Contrary to most previous reports, studies on temporal distribution of cocoa capsids indicated that the population peaked in March. ANSE was effective against capsids and other cocoa insect pests and did not affect the predatory ant. When O. longinoda occurred in high numbers, capsid incidence was low. Shade did not influence ant or capsid abundance significantly. ANSE caused 100% mortality of capsids in cage and 79–88% in field experiments. The sex pheromone was as effective as ANSE or ants in suppressing capsids. All the three methods were effective and compatible; hence, they can be used in an integrated pest management strategy for cocoa, including organic production in Ghana.

Keywords

Distantiella theobromaintegrated pest managementneemOecophylla longinodaSahlbergella singularissex pheromone trapsTheobroma cacao
Type
Research Paper
Information
International Journal of Tropical Insect Science , Volume 27 , Issue 2 , June 2007 , pp. 85 - 94
Copyright
Copyright © ICIPE 2007

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References

Adu-Acheampong, R. (1997) Laboratory and field evaluation of neem (Azadirachta indica, A. Juss) for the management of cocoa mirids (Heteroptera: Miridae), M. Phil. thesis submitted to the University of Ghana,76 pp.Google Scholar
Anon. (1951) Capsid research: Chemical control. Annual Report, West African Cocoa Research Institute, April 1949–March 1950, pp. 42–44..Google Scholar
Anon. (2000) Ghana Cocoa Board Handbook 8th ed. Ghana Cocoa Board, Accra. 62 pp.Google Scholar
Anon. (2005) The State of the Ghanaian Economy in 2004. Institute of Statistical, Social and Economic Research (ISSER), University of Ghana, Legon. 213 pp.Google Scholar
Asante, E. G. and Ampofo, S. T. (1999) Formation of village level farmers' services companies as a means of improving farmers' productivity and cocoa production in short term. Document submitted to Ministry of Food and Agriculture, Ghana. 25 pp.Google Scholar
Ayenor, G. K., Röling, N. G., Padi, B., Van Huis, A., Obeng-Ofori, D. and Atengdem, P. B. (2004) Converging farmers' and scientists' perspectives on researchable constraints on organic cocoa production in Ghana: Results of a diagnostic study. NJAS-Wageningen Journal of Life Sciences 52, 261–284.CrossRefGoogle Scholar
Brew, A. H. and Koranteng, S. (1984) Biological control of capsids. Cocoa Research Institute of Ghana. Annual Report, 1976/77–1978/7995. 95 pp..Google Scholar
Entwistle, P. F. (1972) Pests of Cocoa. Longmans, London. 779 pp.Google Scholar
Henderson, C. P., Owusu, G. K., Jones, A. P. and Padi, B. (1994) The importance to cocoa research of understanding farmers' rationale towards pest and disease control with reference to capsid and black pod disease control in Ghana, pp. 299–304. In Proceedings of the 11th International Cocoa Research Conference, 18–24 July 1993, Yamoussoukro, Côte d'Ivoire (Edited by J. de Lafforest). Stephen Austin and Sons Ltd, Hertford, England.Google Scholar
Johnson, C. G. and Burge, G. A. (1971) Field trials of anti-capsids insecticides on farmers' cocoa in Ghana 1956–60: Effects of different insecticides compared by counting capsids, and capsid-counting compared with counting the percentage of newly damaged trees. Ghana Journal of Agricultural Science 4, 33–38.Google Scholar
Leston, D. (1971) Ants, capsids and swollen shoot in Ghana: Interactions and the implications for pest control, pp. 205–221. In Proceedings of the 3rd International Cocoa Research Conference, Accra, Ghana, 1969. Cocoa Research Institute of Ghana.Google Scholar
Marchart, H. (1971) Reply to Denis Leston: Ants, capsids and swollen shoot, pp. 235–236. In Proceedings of the 3rd Cocoa International Research Conference, Accra, Ghana, 1969. Cocoa Research Institute of Ghana.Google Scholar
Opoku, I. Y., Appiah, A. A. and Akrofi, A. Y. (2000) Pytophtora megajkarya: A potential threat to the cocoa industry in Ghana. Ghana Journal of Agricultural Science 33, 23–248.CrossRefGoogle Scholar
Padi, B. and Adu-Acheampong, R. (2003) Population dynamics and damage of cocoa capsids (and other insects) on hybrid cocoa in Ghana. 2002/2003 Cocoa Research Institute of Ghana Progress Report, pp. 178–189..Google Scholar
Padi, B., Ackonor, J. B., Abitey, M. A., Owusu, E. B., Fofie, A. and Asante, E. (2000) Report on the Insecticide Use and Residues in Cocoa Beans in Ghana. Internal Report submitted to the Ghana Cocoa Board, 26 pp.Google Scholar
Padi, B., Ackonor, J. B. and Opoku, I. Y. (2002) Cocoa IPM research and implementation in Ghana, pp. 54–62. In West African Regional Cocoa IPM Workshop—Proceedings (Edited by Vos, J. G. M. and Neuenschwander, P.). (In English and French) ISBN 1872691625. CPL Press, Newbury, UK.Google Scholar
Padi, B., Downham, M., Farman, D. I. and Sarfo, J. E. (2001) Evidence of sex attractants in the cocoa mirids Distantiella theobroma (Dist) and Sahlbergella singularis Hagl. (Heteroptera: Miridae) in field-trapping experiments, pp. 395–402. In Proceedings of the 13th International Cocoa Conference, Kota Kinabalu, Saba, Malaysia, 9–14 October. Cocoa Producers' Alliance.Google Scholar
Padi, B., Adu-Acheampong, R., Asamoah, M., Aneani, F., Baah, F. and Tamakloe, M. K. (2004) Screening of neem extracts for the control of cocoa capsids, pp. 395–402. In Proceedings of 4th International Cocoa Pests and Diseases (INCOPED) Seminar, Accra, Ghana, 19–21 October 2003. Ghana Cocoa Board.Google Scholar
Peng, R. K., Christian, K. and Gibbs, K. (1999) The effect of colony isolation of the predacious ant, Oecophylla smaragdina, (F.) (Hymenoptera: Formicidae), on protection of cashew plantations from insect pests. International Journal of Pest Management 45, 189–194.CrossRefGoogle Scholar
Van Mele, P. and Cuc, N. T. T. (2003) Ants as Friends: Improving Your Tree Crops With Weaver Ants. CABI Bioscience, Cali (Colombia). 67 pp.Google Scholar
Wood, G. A. R. and Lass, R. A. (1985) Cocoa. 4th edn. Longman Scientific and Technical, London. 620 pp.Google Scholar