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The influence of overhead shade and fertilizers on the Homoptera of mature Upper-Amazon cocoa trees in Ghana

Published online by Cambridge University Press:  10 July 2009

C. A. M. Campbell
C. A. M. Campbell
Affiliation:
Cocoa Research Institute, P.O. Box 8, New Tafo, Ghana
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Abstract

Homoptera were assessed by examining branches from mature cocoa trees in an Upper-Amazon 3 × 33 shade × nitrogen, phosphate and potash fertilizer experiment at Tafo, Ghana. Trees in territories of the ants Crematogaster clariventris Mayr and Acantholepis capensis Mayr were sampled. Planococcoides njalensis (Laing), Planococcus citri (Risso), Phenacoccus hargreavesi (Laing), Pseudococcus concavocerarii James, Maconellicoccus ugandae (Laing) and Mesohomotoma tessmanni (Aulm.) were more abundant on unshaded trees than on shaded ones. Steatococcus sp. and Stictococcus sjostedti Ckll. also occurred most frequently on unshaded trees. The abundance of five other infrequently recorded species was unaffected by overhead shade. A species of Gascardia near G. zonata (Newst.) was more common as shade increased. Planococcus citri increased with increasing nitrogen where A. capensis was dominant, and decreased with increasing potassium on heavily shaded trees where C. clariventris was dominant. M. tessmanni decreased with increasing potassium both on unshaded trees where A. capensis was dominant and on trees which had received most phosphate where C. clariventris was dominant. No responses to fertilizers were detected among other species. An estimated 100, 99 and 83%, respectively, of unshaded, lightly and heavily shaded trees were infested with mealybugs, vectors of cocoa swollen shoot virus. These estimates presage little change in the rate of spread of virus due to the continued shade thinning over cocoa in Ghana.

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Type
Original Articles
Information
Bulletin of Entomological Research , Volume 74 , Issue 1 , March 1984 , pp. 163 - 174
Copyright
Copyright © Cambridge University Press 1984

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References

Ahenkorah, Y. & Akrofi, G. S. (1968). Amazon cacao (Theobroma cacao L.) shade and manurial experiment (K2–01) at the Cocoa Research Institute of Ghana. I. First five years.—Agron. J. 60, 591–594.CrossRefGoogle Scholar
Ahenkorah, Y. & Akrofi, G. S. (1977). Amazon cocoa (Theobroma cacao L.) shade and manurial experiment (K2–01) at Cocoa Research Institute of Ghana. III: cumulative yield analysis.—pp. 291–301in Atanda, O. A., Olaniran, Y. A. O., Omotosho, T. I., Youdeowei, A., Adelusi, I. O. & Daramola, A. M. (Eds.). Proceedings of the 5th International Cocoa Research Conference. Cocoa Research Institute of Nigeria, Ibadan, Nigeria 1–9th September, 1975.—642 pp. Ibadan, Nigeria.Google Scholar
Ahenkorah, Y., Halm, B. J. & Akrofi, G. S. (1977). Some agronomic factors affecting cocoa rehabilitation in Ghana.—pp. 199–203in Atanda, O. A., Olaniran, Y. A. O., Omotosho, T. I., Youdeowei, A., Adelusi, I. O. & Daramola, A. M. (Eds.). Proceedings of the 5th International Cocoa Research Conference, Cocoa Research Institute of Nigeria, Ibadan, Nigeria 1–9th September, 1975.—642 pp. Ibadan, Nigeria.Google Scholar
Alvim, P., De, T. (1977). Ecological and physiological determinants of cacao yield.—pp. 25–38in Atanda, O. A., Olaniran, Y. A. O., Omotosho, T. I., Youdeowei, A., Adelusi, I.O. & Daramola, A. M. (Eds.). Proceedings of the 5th International Cocoa Research Conference,Cocoa Research Institute of Nigeria,Ibadan, Nigeria1–9th September. 1975.—642 pp. Ibadan, Nigeria.Google Scholar
Bigger, M. (1973). Association analysis.—Rep. Cocoa Res. Inst., Ghana 1971–72, 120–125.Google Scholar
Bigger, M. (1976). Virus outbreak survey.—Rep. Cocoa Res. Inst., Ghana 1973–74, 101–107.Google Scholar
Bigger, M. (1981 a). Observations on the insect fauna of shaded and unshaded Amelonado cocoa.—Bull. ent. Res. 71. 107–119.CrossRefGoogle Scholar
Bigger, M. (1981 b). The relative abundance of the mealybug vectors (Hemiptera: Coccidae and Pseudococcidae) of cocoa swollen shoot disease in Ghana.—Bull. ent. Res. 71, 435–448.CrossRefGoogle Scholar
Campbell, C. A. M. (1983). The assessment of mealybugs (Pseudococcidae) and other Homoptera on mature cocoa trees in Ghana.—Bull. ent. Res. 73, 137–151.CrossRefGoogle Scholar
De Fluiter, H. J. (1937). Waarnemingen omtrent de witte luisbestrijding.—Bergcultures 11, 995–999.Google Scholar
De Mire, P. B. (1975). Comportement de cultivars de cacaoyers a l'égard des attaques d'homoptères.—pp. 176–180in Kumar, R. (Ed.). Proceedings of the 4th Conference of West African Cocoa Entomologists,Zoology Department, University of Ghana,Legon, Ghana,9–13th December, 1974.—202 pp. Legon, Ghana, Zool. Dep., Univ. Ghana.Google Scholar
Entwistle, P. F. (1972). Pests of cocoa.—779 pp. London, Longman.Google Scholar
Fennah, R. G. (1954). Nitrogen partition in the normal cacao leaf.—Rep. Cacao Res. 1953, 45–52.Google Scholar
Fennah, R. G. (1959). Nutritional factors associated with the development of mealybugs on cacao.—Rep. Cacao Res. 1957–1958, 18–28.Google Scholar
Firempong, S. (1982). The performance of Planococcoides njalensis (Homoptera: Pseudococcidae) on some cocoa cultivars.—Ann. appl. Biol. 100 (Supplement: Tests of agrochemicals and cultivars, 3), 100–101.Google Scholar
Gibbs, D. G. & Leston, D. (1970). Insect phenology in a forest cocoa-farm locality in West Africa.—J. appl. Ecol. 7, 519–548.CrossRefGoogle Scholar
Hutcheon, W. V. (1977). Physiological aspects of cocoa agronomy.—pp. 39–48 in Atanda, O. A., Olaniran, Y. A. O., Omotosho, T. I., Youdeowei, A., Adelusi, I.O. & Daramola, A. M. (Eds.). Proceedings of the 5th International Cocoa Research Conference,Cocoa Research Institute of Nigeria,lbadan, Nigeria1–9th September, 1975.—642 pp. Ibadan, Nigeria.Google Scholar
Johnson, C. G. (1962). The ecological approach to cocoa disease and health.—pp. 348–352in Wills, J. B. (Ed.). Agriculture and land use in Ghana. —504 pp. Oxford, Univ. Press.Google Scholar
Legg, J. T. (1979). The campaign to control the spread of cocoa swollen shoot virus in Ghana.—pp. 285–293in Ebbels, D. L. & King, J. E. (Eds.). Plant health. The scientific basis for administrative control of plant diseases and pests.—322 pp. Oxford, Blackwell.Google Scholar
Mattson, W. J. (1980). Herbivory in relation to plant nitrogen content.—Ann. Rev. Ecol. & Syst. 11, 119–161.CrossRefGoogle Scholar
McNeill, S. & Southwood, T. R. E. (1978). The role of nitrogen in the development of insect/plant relationships.—pp. 77–98in Harborne, J. B. (Ed.).Biochemical aspects of plant and animal coevolution.—435 pp. London, Academic Press.Google Scholar
Murray, D. B. (1953). A shade and fertiliser experiment with cacao—progress report—continued.—Rep. Cacao Res. 1952, 11–21.Google Scholar
Murray, D. B. (1955). A shade and fertiliser experiment with cacao. IV.—Rep. Cacao Res. 1954, 32–36.Google Scholar
Prestidge, R. A. (1982). The influence of nitrogenous fertilizer on the grassland Auchenorrhyncha (Homoptera).—J. appl. Ecol. 19, 735–749.CrossRefGoogle Scholar
Roivainen, O. (1976). Transmission of cocoa viruses by mealybugs (Homoptera: Pseudococcidae).—J. scient. agric. Soc. Finland 48, 203–304.Google Scholar
Schoene, W. J. (1941), Plant food and mealybug injury.—J. econ. Ent. 34, 271–274.CrossRefGoogle Scholar
Van Emden, H. F., Eastop, V. F., Hughes, R. D. & Way, M. J. (1969). The ecology of Myzus persicae.—A. Rev. Ent. 14, 197–270.CrossRefGoogle Scholar