Hostname: page-component-586b7cd67f-2plfb Total loading time: 0 Render date: 2024-11-22T19:09:17.289Z Has data issue: false hasContentIssue false
  • English
  • Français

Aspects of varietal resistance in cowpea to the black cowpea moth, Cydia ptychora (Meyrick) (Lepidoptera: Tortricidae)

Published online by Cambridge University Press:  19 September 2011

T. I. Ofuya  and
A. E. Akingbohungbe
T. I. Ofuya
Affiliation:
Department of Plant Science, University of Ife, Ile-Ife, Nigeria
A. E. Akingbohungbe
Affiliation:
Department of Plant Science, University of Ife, Ile-Ife, Nigeria
Get access

Abstract

Cohort tests in screened cages confirmed that the cowpea varieties TVu 2994, TVu 3709, EW/1, BPL-3–1, ER-7 and Vita 5 have promising levels of resistance to Cydia ptychora (Meyrick). The resistance was found to be mainly explained by antixenosis with respect to oviposition.

In no-choice tests in the laboratory, high larval mortality was recorded in TVu 3709 and BPL-3–1. Additionally, comparatively lighter-weight final instar larvae and adult females with reduced fecundity, fertility and longevity were reared from TVu 3709 and TVu 2994. Larvae reared on Vita 5 were slower in developing to adults than on other varieties; they were also relatively lighter in weight, while adults emerging from them showed reduction in size and fecundity. It is therefore concluded that resistance in TVu 3709, TVu 2994, BPL-3–1 and Vita 5 is partly due to larval antibiosis.

Résumé

Des tests de groupe en cages voilées ont confirmé que les variétés de cowpea TVu 2994, TVu 3709, EW/1, BPL-3–1, ER7 et Vita 5 out des niveaux prometteurs de résistance a la Cydia ptychora (Meyrick). La résistance a été confirmée par la principale explication du fait dela mauvais hôte pour l'oviposition.

Dans des tests sans choix en laboratoire, une haute mortalité en larves a été enregistrée en TVu 3709 et BPL-3–1. En outre chez des larves en stade final compatativement de poids plus léger et les femelles adultes de fécondité réduite, la fertilité et la longévité étaient rares de TVu 3709 à 2994. Les larves rares en Vita 5 étaient plus lents dans leur développement adulte qu'en d'autres variétés; elles étaient également relativement plus légères en poids alors gue les adultes dérivées d'elles montrent une réduction en taille et fécondité. On peut donc conclure que la résistance en TVu 3709, TVu 2994, BPL-3–1 et Vita 5 est en partie dûe à larvie des larves.

Keywords

ResistancecowpeavarietyCydia ptychoraantixenosisantibiosiscohortno-choice
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 7 , Issue 6 , December 1986 , pp. 777 - 780
Copyright
Copyright © ICIPE 1986

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Akingbohungbe, A. E., Agbede, T. and Olaifa, J. I. (1980) Oviposition preference by the black cowpea moth, Cydia ptychora (Meyrick) (Lepidoptera: Tortricidae) for different varieties of cowpea. Bull. ent. Res. 70, 439–443.CrossRefGoogle Scholar
Dina, S. O. (1976) Effect of insecticidal application at different phases on insect damage and yield of cowpea. J. econ. Ent. 69, 186–188.CrossRefGoogle Scholar
Dina, S. O. (1977) Effects of monocrotophos on insect damage and yield of cowpea (Vigna unguiculata) in southern Nigeria. Expl Agric. 13, 155–159.CrossRefGoogle Scholar
Ezueh, M. I. (1981) The biological bases of resistance in cowpea to the cowpea moth, Cydia ptychora (Lepidoptera: O1ethreutidae). Ann. appl. Biol. 99, 313–321.CrossRefGoogle Scholar
Ezueh, M. I. and Taylor, T. A. (1981) Field resistance in cowpea, Vigna unguiculata to the cowpea moth, Cydia ptychora. Ann. appl. Biol. 99, 307–312.CrossRefGoogle Scholar
Ofuya, T. I. (1984) Studies on cowpea varietal resistance to the black cowpea moth, Cydia ptychora (Meyrick) (Lepidoptera: Tortricidae). Ph.D. thesis, University of Ife, Nigeria.Google Scholar
Olaifa, J. I. and Akingbohungbe, A. E. (1981a) Studies on the life history and life stages of the black cowpea moth, Cydia ptychora. Insect Sci. Applic. 1, 151–160.Google Scholar
Olaifa, J. I. and Akingbohungbe, A. E. (1981b) Aspects of the biology of the black cowpea moth, Cydia ptychora (Lepidoptera: Tortricidae) related to host plant phenology. Ann. appl. Biol. 97, 129–134.CrossRefGoogle Scholar
Olaifa, J. I. and Akingbohungbe, A. E. (1982) Seasonal population fluctuations in the black cowpea moth, Cydia ptychora (Meyrick) (Lepidoptera: Tortricidae). Insect Sci. Applic. 3, 73–77.Google Scholar
Perrin, R. M. (1978a) Varietal differences in the susceptibility of cowpea to larvae of the seed moth, Cydia ptychora (Meyrick) (Lepidoptera: Tortricidae). Bull. ent. Res. 68, 47–56.CrossRefGoogle Scholar
Perrin, R. M. (1978b) The effect of some cowpea varieties on the development and survival of larvae of the seed moth, Cydia ptychora (Meyrick) (Lepidoptera: Tortricidae). Bull. ent. Res. 68, 57–63.CrossRefGoogle Scholar
Singh, S. R. and Emden, H. F. van (1979) Insect pests of grain legumes. A. Rev. Ent. 24, 255–278.CrossRefGoogle Scholar
Taylor, T. A. (1965) Observations on the bionomics of Laspeyresia ptychora Meyr. (Lepidoptera: Eucosmidae) infesting cowpea in Nigeria. Bull. ent. Res. 55, 761–773.CrossRefGoogle Scholar