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Studies on the biology of the palm aphid, Cerataphis variabilis (Homoptera: Pemphigidae), on Raphia hookeri–1: Developmental period of the immatures, fecundity and longevity of the apterous adults

Published online by Cambridge University Press:  08 April 2017

D. A. Enobakhare
D. A. Enobakhare
Affiliation:
Department of Agricultural Biology, University of Ibadan, Nigeria
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Abstract

The biology of the aphid, Cerataphis variabilis H.R.L., on Raphia hookeri Mann & Wendl., was studied in the laboratory and the field using a ‘clip-on’ cage and a sleeve cage. The first instar lasted 5.1 days. The second and third instars each lasted 2.45 days, while the fourth instar lasted 2.4 days. The total developmental period of the nymphs was 11.3 days at 26.4 ± 1.43°C and r.h. 83 ± 1.46%; 11.6 days at 26.4 ± 1.63°C and r.h. 85 ± 1.19%; 12.9 days at 27.9 ± 1.04°C and r.h. 75.5 ± 1.64%; 12.95 days at 27.8 ± 0.33°C and r.h. 69 ± 1.23%; 15 days at 21.4 ± 0.58°C and r.h. 45 ± 1.77%. These periods were significantly different at 5% level (LSD = 0.59 days). The higher the temperature and relative humidity the shorter the developmental period (with temperature: r = −0.69, 20.8–28.9°C; r.h.: r = −0.97, 43.2–86.2%). The number of progeny per adult ranged from 54 to 60 in a period of 28–31 days. The longevity ranged from 31 to 34 days.

Résumé

La biologie de l'aphis, Cerataphis variabilis (H.R.L.) sur Raphia hookeri (Mann & Wendl.) a été étudiée au laboratoire et aux champs en se servant de la cage ‘clip-on’ et d'une cage à manchon. Le premier ‘instar’ a duré 5,1 jours. Le deuxième et le troisième instars ont duré 2,45 jours respectivement tandis que le quatrième instar a duré 2,4 jours. La période totale de développement des nymphes était de 11,3 jours à 26,4 ± 1,43°C et r.h. 83 ± 1,46%; 11,6 jours à 26,4 ± 1,63°C et r.h. 85 ± 1,19%; 12,9 jours à 27,9±1,04°C et r.h. 75,5±1,64%; 12,95 jours à 27,8±0.33°C et r.h. 69±1,23%; 15 jours à 21,4±0.58°C et r.h. 45±1,77%. Ces périodes étaient différentes d'une manière significative au niveau de 5% (LSD = 0,59 jours). Plus la temperature et l'humidité relative montent, plus courte la période de développement (avec température: r = −0,69, 20,8–28,9°C; humidité relative: r = −0,97,43,2–86,2%). Le nombre de progéniture par adulte allait de 54–60 dans une période de 28–31 jours. La longévité allait de 31–34 jours.

Keywords

Cerataphis variabilisRaphia hookeriapterous adultslongevityfecundityCerataphis variabilisRaphia hookeriaptèrelongévitéfécondité
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 6 , Issue 2 , April 1985 , pp. 177 - 181
Copyright
Copyright © ICIPE 1985

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References

REFERENCES

Barlow, C. A. (1962) The influence of temperature on the growth of experimental populations of Myzus persicae (Sulzer) and Macrosiphum euphorbiae (Thomas) Aphididae. Can. J. Zool. 40, 145–156.CrossRefGoogle Scholar
Dean, G. J. W. (1973) Bionomics of aphids reared on cereals and some Gramineae. Ann. appl. Biol. 73, 127–135.CrossRefGoogle Scholar
Dean, G. J. W. (1974) The overwintering and abundance of cereal aphids. Ann. appl. Biol. 76, 1–7.CrossRefGoogle Scholar
Eastop, V. F. (1961) A Study of the Aphididae (Homoptera) of West Africa. Clowes, London.Google Scholar
Hughes, R. D. (1963) Population dynamics of the cabbage aphid, Brevicoryne brassicae (L.). J. Anim. Ecol. 32, 293–424.CrossRefGoogle Scholar
Jones, M. G. (1967) Observations on two races of the groundnut aphid, Aphis craccivora. Entomologia exp. appl. 10, 31–38.CrossRefGoogle Scholar
Kennedy, J. S. and Stroyan, H. L. G. (1959) Biology of aphids. A. Rev. Ent. 4, 131–160.Google Scholar
Lambers, H. R. (1953) Cerataphis variabilis sp. n. Africa. Agric. J. Fiji 24, 95.Google Scholar
Singh, S. R. and Emden, H. F. van (1978) Insect pests of grain legumes. A. Rev. Ent. 24, 255–278.CrossRefGoogle Scholar
Tsitsipis, J. A. and Mittler, T. E. (1976) Development, growth, reproduction and survival of apterous virginoparae of A. fabae at different temperatures. Entomologia exp. appl. 19, 1–10.Google Scholar