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Comparative studies on the developmental potential of the palm aphid, Cerataphis palmae Ghesquière on young dwarf coconut varieties

Published online by Cambridge University Press:  19 September 2011

D. A. Enobakhare  and
B. W. Omogiate
D. A. Enobakhare
Affiliation:
Department of Crop Science, Faculty of Agriculture University of Benin, P.M.B. 1154, Benin City, Nigeria
B. W. Omogiate
Affiliation:
Department of Crop Science, Faculty of Agriculture University of Benin, P.M.B. 1154, Benin City, Nigeria
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Abstract

The developmental potential of the palm aphid Cerataphis palmae Ghesquière (Homoptera: Pemphigidae) on three dwarf coconut varieties—Malayan dwarf red (Mdr), Malayan dwarf green (Mdg) and Malayan dwarf yellow (Mdy)—was studied in a screenhouse using leaf clip-on cages. Under similar temperature (30°C ± 1.13) and relative humidity (69.8% ± 1.63) conditions, the aphid expressed significant differences in fecundity, longevity and developmental period on the coconut varieties. The total developmental period on Mdr lasted 12.17 ± 0.76 days while on Mdg and Mdy it was 14.84 ± 0.63 and 13.83 ± 1.05 days, respectively. Thus the aphid population increased on the dwarf red variety over a significantly shorter period than it did on the other two varieties. Furthermore, fecundity and longevity of C. palmae on Mdr were significantly higher than on the Mdg and Mdy varieties (P < 0.01). These results indicate that Mdr supports C. palmae development better than the other two palm varieties.

Résumé

Le développement potentiel du puceron Cerataphis palmae Ghesquière (Homoptera: Pemphigidae) a été étudié en chambre contrôlée, sur trois variétés naines de cocotier malais: Malasian dwarf red (Mdr), Malasian dwarf green (Mdg) et Malasian dwarf yellow (Mdy), en utilisant des plantes isolées dans des cages. Sous les mêmes conditions de température (30°C ± 1,13) et d'humidité relative (69,8 ± 1,63), le puceron a révélé des différences significatives de fécondité, de longévité et de durée de développement sur les diverses variétés. La durée totale de développement sur Mdr était de 12,17±0,76 jours tandis que sur Mdg et Mdy, elle était respectivement de 14,84 ± 0, 63 et de 13,83 ± 1,63 jours. Ainsi la population du puceron s'est accrue dans un temps très court sur la variété naine rouge comparativement aux deux autres. En outre, la fécondité et la longévité de C. palmae sur Mdr étaient sensiblement plus élevées que sur les variétés Mdg et Mdy (P < 0.01). Ces résultats indiquent que la variété Mdr supporte mieux le développement de C. palmae que les autres cocotiers.

Keywords

Malayan dwarf coconutsfecunditylongevitydevelopmental periodcocotiers malais nainsféconditélongévitépériode de développement
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 20 , Issue 4 , December 2000 , pp. 275 - 279
Copyright
Copyright © ICIPE 2000

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