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Effect of Mixed Cropping Beans, Cowpeas and Maize on Population Densities of Bean Flower Thrips, Megalurothrips sjostedti (Trybom) (Thripidae)

Published online by Cambridge University Press:  19 September 2011

S. Kyamanywa  and
E. M. Tukahirwa
S. Kyamanywa
Affiliation:
Department of Crop Science, Makerere University, P.O. Box 7062, Kampala, Uganda
E. M. Tukahirwa
Affiliation:
Department of Zoology, Makerere University, P.O. Box 7062, Kampala, Uganda
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Abstract

The effect of growing cowpeas mixed with either beans or maize on population densities of Megalurothrips sjostedti (Trybom) was investigated. Also investigated was the effect of varying the cropping densities of the host plants on the pest populations.

There was a significantly lower population of M. sjostedti in cowpea/maize, bean/maize, and cowpea/bean/maize mixed stands as compared with that in either cowpea/bean stands or monoculture stands of cowpeas and beans. Increasing the cropping densities of the host crops increased the abundance of the pest in non-maize based mixed stands, but this effect was not observed in the maize-based mixed stands.

The results indicate that with regard to infestation by M. sjostedti, the practice of mixed cropping beans with cowpeas confers no advantage to either crop with respect to attack by M. sjostedti. On the contrary, combining the two crops attracted infestation levels similar to those attracted by either crop grown in monoculture. But the inclusion of a non-host plant (maize) in the mixture, significantly reduces infestation.

Résumé

Nos recherches ont porté sur l'effet que la culture mixte des petits pois, melés soit aux haricots, soit au maïs peut avoir sur la densité de la population de Megalurothrips sjostedti (Trybom). Egalément, nous avons examiné l'effet de la variation de la quantité des plantes hôtes sur la population des parasites.

Il y a eu une réduction significative des populations des M. sjostedti dans les emplacements mixtes des petits pois/maïs, haricots/maïs, et petits pois/haricots/maïs en comparaison avec la quantité quise constituait les mélanges des petits pois/haricots ou d'une seule culture individuelle. L'augmentation des densités des cultures des plantes hôtes a mené à l'accroissement des parasites dans les mélanges qui n'avaient pas de maïs, maïs cet effet n'a pas été constaté dans les mélanges avec le maïs.

Les résultats ont indiqué qu'en ce qui concerne l'infection M. sjostedti, la pratique de la culture mixte des haricot et des petits pois n'apporte pas d'avantages à aucune de ces deux plantes, cela a plutôt pour effet d'augmenter la densité des plantes hôtes ce qui, par conséquent, conduit les deux plantes à s'exposer à une étrangère dans le mélange réduit, à un degré significatif le danger d'infection.

Keywords

Mixed croppingbean flower thripsMegalurothrips sjostediinfestationbeanscowpeasmaizeplanting densityLa culture mixteles thrips des fleurs de haricotsMegalurothrips sjostedti l'infectionles haricotsles petits poisles maïsla densité des cultures
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 9 , Issue 2 , April 1988 , pp. 255 - 259
Copyright
Copyright © ICIPE 1988

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References

REFERENCES

Altieri, M. A., Francis, C. A., Schoonhoven Van, A. and Doll, J. (1978). A review of insect prevalence in maize (Zea mays) and beans (Phaseolus vulgaris) polycultural systems. Field Crops Res. 1, 33–49.Google Scholar
Altieri, M. A. and Letourneau, D. K. (1982) Vegetation management and biological control in agroecosystems. Crop Prot. 1, 405–530.Google Scholar
Capinera, J. L., Weissling, T. J. and Schweizer, E. E. (1985) Compatibility of intercropping with mechanized agriculture; effect of strip intercropping of Pinto beans with sweet corn on insect abundance in Colorado. J. econ. Ent. 78, 354–357.Google Scholar
de Pury, J. M. S. (1968) Crop Pests of East Africa, pp. 41–43. Oxford University Press, East Africa.Google Scholar
Dunbar, A. R. (1969) The Annual Crops of Uganda, pp. 57–68. East African Literature Bureau.Google Scholar
Francis, C. A. (1978) Multiple cropping potentials of beans and maize. Hort. Sci. 13, 12–17.Google Scholar
Mumford, J. D. and Baliddawa, C. W. (1983) Factors affecting insect pest occurrence in various cropping systems. Insect Sci. Applic. 4, 59–64.Google Scholar
Nicol, H. H. (1935) Mixed cropping in primitive agriculture. J. Exp. Agric. 3, 189–195.Google Scholar
Nyiira, Z. M. (1973) Pest status of thrips and Lepidopterous species on vegetables in Uganda. E. A. Agric. For. J. 39, 131–135.Google Scholar
Risch, J. S. (1980) The population dynamics of several herbivorous beetles in tropical agroecosystems: The effect of intercropping corn, beans and squash in Costa Rica. J. Appl. Ecol. 17, 593–611.Google Scholar
Risch, J. S., Andow, D. and Altieri, A. M. (1983) Agroecosystem diversity and pest control: Data tentative conclusions and new research directions. Environ. Ent. 12, 625–629.CrossRefGoogle Scholar
Taylor, T. A. (1969) On the population dynamics and flight activity of Taeniothrips sjostedti. Tryb. (Thysanoptera: Thripidae) on cowpeas. Bul. Ent. Soc. Nigeria 2, 60–71.Google Scholar
Tukahirwa, E. M. and Coaker, T. H. (1982) Effect of mixed cropping on some insect pests of brassicas: Reduced Brevicoryne brassicae infestations and influences on epigeal predators and the disturbance of oviposition behaviour in Delia brassicae. Ent. Exp. Appl. 32, 129–140.Google Scholar
Willey, R. W. and Osiru, D. S. O. (1972) Studies on mixture of maize and beans (Phaseolus vulgaris) with particular reference to plant population. J. Agric. Sci. 79, 517–529.Google Scholar