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Seasonal variation in cowpea crop performance at Ile-Ife, Nigeria and the relationship to insect damage

Published online by Cambridge University Press:  19 September 2011

A. E. Akingbohungbe
Affiliation:
Department of Plant Science, University of Ife, Ile-Ife, Nigeria
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Abstract

The trends in flowering, podding and seed yield of four cowpea varieties planted at different times of the growing season in 1975 and 1976, were studied along with the associated pest activity. Flowering, podding and seed yield were found to decrease over the season from April to September irrespective of whether the crop was protected against insect pests or not. However, there seemed to be two peak periods of pest activity—April to July and October to December—when severe damage to the crop occurred in unprotected plots. Planting in June or July usually led to an escape from several major pests even though the cool night temperatures and incidence of overcasts at that period seem to preclude optimal reproductive performance of the crop.

The pattern of insect pest succession on the crop over the season is discussed and it is suggested that for small farm holders in Southern Nigeria, who are unlikely to apply insecticides, planting in June is advisable.

Type
Research Article
Copyright
Copyright © ICIPE 1982

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References

REFERENCES

A'Brook, J. (1965) The effect of planting date and spacing on the incidence of groundnut rosette disease and of the vector, Aphis craccivora Koch, at Mokwa, Northern Nigeria. Ann. appl. Biol. 54, 199208.CrossRefGoogle Scholar
Akingbohungbe, A. E. (1977) Notes on the identity and biology of the Riptortus spp. (Heteroptera: Alydidae) associated with cowpeas in Nigeria. J. nat. Hist. 11, 477483.CrossRefGoogle Scholar
Akinola, J. O. and Davies, J. H. (1978) Effects of sowing date on forage and seed production of 14 varieties of cowpea (Vigna unguiculata). Expl. Agric. 14, 197203.CrossRefGoogle Scholar
Booker, R. H. (1964) The effect of sowing date and spacing on rosette disease of groundnut in Northern Nigeria, with observations on the vector, Aphis craccivora. Ann. appl. Biol. 52, 125131.CrossRefGoogle Scholar
Booker, R. H. (1965a) Pests of cowpea and their control in Northern Nigeria. Bull. ent. Res. 55, 663672.CrossRefGoogle Scholar
Booker, R. H. (1965b) List of insect species found in association with cowpeas at Samara, I. A. R. Ahmadu Bello Univ., Zaria, Nigeria. Samaru Misc. Paper No. 9, 4pp.Google Scholar
Egwuatu, R. I. and Taylor, T. A. (1980) Studies on the seasonal changes in the population of Clavigralla tomentosicollis Stal (Hemiptera, Coreidae) on Cajanus cajan (L.) Druce (pigeon pea) in Ibadan, Nigerian J. Ent. 3 (In press).Google Scholar
Enyi, B. A. C. (1974) Effects of time of sowing and phosphamidon (Dimecron) on cowpea (Vigna unguiculata). Expl. Agric. 10, 8795.CrossRefGoogle Scholar
Ezedinma, F. O. C. (1966) Some observations on the effect of time of planting on cowpea [Vigna unguiculata (L.) Walp] in Southern Nigeria. J. W. Afr. Sci. Ass. 12, 4549.Google Scholar
Ezedinma, F. O. C. (1973) Seasonal variations in vegetative growth of cowpeas (Vigna unguiculata (L.) Walp) in relation to insolation and ambient temperatures in Southern Nigeria. Proc. 1st Int. Inst. Trop. Agric. Grain Legume Improvement Workshop, pp. 138152.Google Scholar
Faulkner, O. T. and Mackie, W. (1933) West African Agriculture. London: Cambridge University Press.Google Scholar
Kamara, C. S. and Godfrey-Sam-Aggrey, W. (1979) Time of planting, rainfall and soil moisture effects on cowpea in Sierra Leone. Expl. Agric. 15, 315320.CrossRefGoogle Scholar
Libby, J. L. (1968) Insect pests of Nigerian crops Univ. Wis. Coll. Agric. & Life Sci. Res. Bull. 269, 169.Google Scholar
Littleton, E. J., Dennett, M. D., Elston, J. and Monteith, J. L. (1979a) The growth and development of cowpeas under tropicalfield conditions. I. Leaf area. J. agric. Sci., Camb. 93, 291307.CrossRefGoogle Scholar
Littleton, E. J., Dennett, M. D., Monteith, J. L. and Elston, J. (1979b) The growth and development of cowpeas (Viyna unguiculata) under tropical field conditions. 2. Accumulation and partition of dry weight. J. agric. Sci., Camb., 93, 309320.CrossRefGoogle Scholar
Nangju, D., Nwanze, K. F. and Singh, S. R. (1979) Planting date, insect damage and yield of cowpea in Western Nigeria. Expl. Agric. 15, 289298.CrossRefGoogle Scholar
Njoku, E. (1958) The photoperiodic response of some Nigerian plants. Jl W. Afr. Sci. Assoc. 4, 99112.Google Scholar
Olaifa, J. I. (1979) Studies on the biology and dynamics of the black cowpea moth, Cydia ptychora (Meyrick) Lepidoptera: Olethreutidae) at Ile-Ife, Nigeria. M. Phil, thesis, University of Ife, Nigeria. 163 pp.Google Scholar
Raheja, A. K. (1976) Assessment of losses caused by insect pests of cowpeas in Northern Nigeria. Pans. 22, 229233.CrossRefGoogle Scholar
Summerfield, R. J., Huxley, P. A., Dart, P. J. and Late Hughes, A. P. (1976) Some effects of environmental stress on seed yield of cowpea (Vigna unguiculata (L.) Walp.) CV. Prima. Plant and Soil. 44, 527546.CrossRefGoogle Scholar
Taylor, T. A. (1964) Field pests of cowpeas. Federal Dept. of Agric. Res. Memo. No. 52, 6 pp.Google Scholar
Taylor, T. A. (1965) Observations on the bionomics of Lasppyresia ptychora Meyr. (Lepidoptera, Eucosmidae) infesting cowpea in Nigeria. Bull. ent. Res. 55, 761773.CrossRefGoogle Scholar
Taylor, T. A. (1967) The bionomics of Maruca testulalis (Gey.) (Lepidoptera, Pyralidae), a major pest of cowpeas inNigeria. Jl W. Afr. Sci. Assoc. 12, 111129.Google Scholar
Taylor, T. A. (1974) On the population dynamics of Taeniothrips sjostedti (Tryb) (Thysanoptera, Thripidae) on cowpea and an alternative host, Centrosema pubescens Benth., in Nigeria. Rev. Zool. afr. 88, 689702.Google Scholar
Taylor, T. A. and Ezedinma, F. O. C. (1964) Preliminary investigations on field pests of cowpeas and methods of control. Niger. Agric. J. 1, 811.Google Scholar