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FECUNDITY, LONGEVITY, AND INTRINSIC NATURAL RATE OF INCREASE OF EPIDINOCARSIS LOPEZ1 (DE SANTIS) (HYMENOPTERA: ENCYRTIDAE)

Published online by Cambridge University Press:  31 May 2012

Y. Iziquel  and
B. Le Rü
Y. Iziquel
Affiliation:
E.N.S.A.T., Labratoire d'Entomologie, 145 Avenue de Muret, 31076 Toulouse cédex, France
B. Le Rü
Affiliation:
O.R.S.T.O.M., Labratoire d'Entomologie Appliquée, B.P. 181, Brazzaville, R. Congo
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Abstract

A laboratory study of the fecundity, longevity, and intrinsic natural rate of increase of Epidinocarsis lopezi (De Santis) (Hymenoptera: Encyrtidae) was performed at 26 °C, the average temperature observed in the Congo during pullulation of its host Phenacoccus manihoti Mat.-Ferr. (Homoptera: Pseudococcidae). With 30 mealybugs per female per day, the parasitoid lives for an average of 41.4 days and lays 558.5 eggs. The net reproduction rate (R0) was calculated to be 269.9 females per female per generation, the average duration of a generation (T) was 33.9 days, and the intrinsic natural rate of increase of the parasitoid (rm) was 0.213. The fecundity observed in E. lopezi in this study was much higher than the figures previously reported. The rm of the parasitoid appeared to be higher than that determined by other authors for the mealybug. The limits of such a comparison are discussed.

Résumé

Une étude au laboratoire a été réalisée sur Epidinocarsis lopezi (De Santis) (Hym. Encyrtidae) à la température de 26 °C, moyenne des températures qu’il rencontre au Congo durant la phase de pullulation de son hôte Phenacoccus manihoti Mat.-Ferr. (Horn. Pseudococcidae). En présence de 30 cochenilles par femelle et par jour, le parasitoïde vit en moyenne 41,4 jours et pond 558,5 oeufs. Le taux net de reproduction (R0) a été évalué à 269,9 femelles par femelle et par génération, la durée moyenne d’une génération (T) à 33,9 jours et le taux intrinsèque d’accroissement naturel du parasitoïde (rm) à 0,213. Il apparaît que la fécondité trouvée pour E. lopezi dans notre étude est très supérieure aux valeurs rapportées jusqu’ici, et que plusieurs facteurs peuvent l’expliquer. Par ailleurs, le rm du parasitoïde est semble-t-il plus élevé que celui de la cochenille déterminé par d’autres auteurs. On discute des limites d’une telle comparaison.

Type
Articles
Information
The Canadian Entomologist , Volume 124 , Issue 6 , December 1992 , pp. 1115 - 1121
Copyright
Copyright © Entomological Society of Canada 1992

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References

Bhatt, N., and Singh, R.. 1989. Bionomics of an aphidiid parasitoid Trioxys indicus. 30. Effect of host plants on reproductive and development factors. Biological Agriculture and Horticulture 6: 149–157.CrossRefGoogle Scholar
Biassangama, A., Fabres, G., and Nénon, J.P.. 1988. Parasitisme au laboratoire et au champ d'Epidinocarsis (Apoanagyrus) lopezi (Hym.: Encyrtidae) auxiliaire exotique introduit au Congo pour la régulation de l'abondance de Phenacoccus manihoti (Hom.: Pseudococcidae). Entomophaga 33: 453–465.CrossRefGoogle Scholar
Bigler, F. 1989. Quality assessment and control in entomophagous insects used for biological control. Journal of Applied Entomology 108: 390–400.CrossRefGoogle Scholar
Birch, L.C. 1948. The intrinsic rate of natural increase of an insect population. Journal of Animal Ecology 17: 15–26.CrossRefGoogle Scholar
Force, D.C., and Messenger, P.S.. 1964. Fecundity, reproductive rates, and innate capacity for increase of three parasites of Therioaphis maculata (Buckton). Ecology 45: 706–715.CrossRefGoogle Scholar
Giordanengo, P., and Nénon, J.P.. 1990. A study of the life cycle of Epidinocarsis (=Apoanagyrus) lopezi (Hymenoptera: Encyrtidae) introduced parasitoid on the cassava mealybug Phenacoccus manihoti (Homoptera: Pseudococcidae) in Africa. Journal of African Zoology 104: 549–555.Google Scholar
Hagvar, E.B., and Hofsvang, T.. 1990. Fecundity and intrinsic rate of increase of the aphid parasitoid Ephedrus cerasicola Stary (Hym., Aphidiidae). Journal of Applied Entomology 109: 262–267.CrossRefGoogle Scholar
Hammond, W.N.O., and Neuenschwander, P.. 1990. Sustained biological control of the cassava mealybug Phenacoccus manihoti (Hom., Pseudococcidae) by Epidinocarsis lopezi (Hym. Encyrtidae) in Nigeria. Entomophaga 35: 515–526.CrossRefGoogle Scholar
Herren, H.R., and Neuenschwander, P.. 1991. Biological control of cassava pests in Africa. Annual Review of Entomology 36: 257–283.CrossRefGoogle Scholar
Huffaker, C.B., Simmonds, F.J., and Laing, J.E.. 1976. The theoretical and empirical basis of biological control. pp. 41–78 in Huffaker, C.B., and Messenger, P.S. (Eds.), Theory and Practice of Biological Control. Academic Press, New York, NY. 788 pp.Google Scholar
Idoine, K., and Ferro, D.N.. 1988. Aphid honeydew as a carbohydrate source for Edovum puttleri (Hymenoptera: Eulophidae). Environmental Entomology 17: 941–944.CrossRefGoogle Scholar
Iheagwam, E.U. 1981. The influence of temperature on increase rates of the cassava mealybug, Phenacoccus manihoti Mat.-Ferr. (Homoptera, Pseudococcidae). Journal of African Zoology 95: 959–964.Google Scholar
Iziquel, Y. 1990. Le parasitisme de la cochenille du manioc par l'Encyrtidae Epidinocarsis lopezi: un exemple d'interactions hôte–parasitoïde chez les insectes. Thèse d'Université, Rennes 1. 75 pp.Google Scholar
Iziquel, Y., and Le Rü, B.. 1989. Influence de l'hyperparasitisme sur les populations d'un Hyménoptère Encyrtidae, Epidinocarsis lopezi, parasitoïde de la cochenille du manioc Phenacoccus manihoti introduit au Congo. Entomologia Experimentalis et Applicata 52: 239–247.CrossRefGoogle Scholar
Jervis, M.A., and Kidd, N.A.C.. 1986. Host feeding strategies in Hymenopteran parasitoids. Biological Review 61: 395–434.CrossRefGoogle Scholar
Lema, K.M., and Herren, H.R.. 1985. The influence of constant temperature on population growth rates of the cassava mealybug Phenacoccus manihoti. Entomologia Experimentalis et Applicata 38: 165–169.CrossRefGoogle Scholar
Le Rü, B., and Fabres, G.. 1987. Influence de la température et de l'hygrométrie relative sur la capacité d'accroissement de la cochenille du manioc Phenacoccus manihoti (Hom. Pseudococcidae) au Congo. Acta Oecologica, Oecologia Applicata 8: 165–174.Google Scholar
Le Rü, B., Iziquel, Y., Biassangama, A., and Kiyindou, A.. 1991. Variations d'abondance et facteurs de régulation de la cochenille du manioc Phenacoccus manihoti (Hom.: Pseudococcidae) cinq ans après l'introduction d'Epidinocarsis lopezi (Hym.: Encyrtidae) parasitoïde néotropical au Congo en 1982. Entomophaga 36: 499–511.Google Scholar
Le Rü, B., and Papierok, B.. 1987. Taux intrinsèque d'accroissement naturel de la cochenille du manioc, Phenacoccus manihoti Matile-Ferrero (Homoptère, Pseudococcidae). Intérèt d'une méthode simplifiée d'estimation de r m. Acta Oecologica, Oecologia Applicata 8: 3–14.Google Scholar
Le Rü, B., Tertuliano, M., and Calatayud, P.A.. 1992. Les différentes catégories de résistance des plantes–hôtes de la cochenille du manioc Phenacoccus manihoti (Hom. Pseudococcidae), perspectives d'études. Résumé du 4è Atelier du Réseau CORAF Manioc: Biocénose des principaux ravageurs du manioc et lutte biologique. I.I.T.A., Bénin, Cotonou, 4–9 mars 1991. In press.Google Scholar
Löhr, B., Varela, A.M., and Santos, B.. 1989. Life-table studies on Epidinocarsis lopezi (De Santis) (Hym., Encyrtidae), a parasitoid of the cassava mealybug, Phenacoccus manihoti Mat.-Ferr. (Hom., Pseudococcidae). Journal of Applied Entomology 107: 425–434.CrossRefGoogle Scholar
Messenger, P.S. 1964. Use of life tables in a bioclimatic study of an experimental aphid–braconid wasp host–parasite system. Ecology 45: 119–131.CrossRefGoogle Scholar
Neuenschwander, P., Hammond, W.N.O., Gutierrez, A.P., Cudjoe, A.R., Adjakloe, R., Baumgärtner, J.U., and Regev, U.. 1989. Impact assessment of the biological control of the cassava mealybug, Phenacoccus manihoti Matile-Ferrero (Hemiptera: Pseudococcidae), by the introduced parasitoid Epidinocarsis lopezi (De Santis) (Hymenoptera: Encyrtidae). Bulletin of Entomological Research 79: 579–594.CrossRefGoogle Scholar
Neuenschwander, P., and Madojemu, E.. 1986. Mortality of the cassava mealybug, Phenacoccus manihoti Mat.-Ferr. (Hom.: Pseudococcidae), associated with an attack by Epidinocarsis lopezi (Hym.: Encyrtidae). Bulletin de la Société Entomologique Suisse 59: 57–62.Google Scholar
Neuenschwander, P., Schulthess, F., and Madojemu, E.. 1986. Experimental evaluation of the efficiency of Epidinocarsis lopezi, a parasitoid introduced into Africa against the cassava mealybug Phenacoccus manihoti. Entomologia Experimentalis et Applicata 42: 133–138.CrossRefGoogle Scholar
Odebiyi, J.A., and Bokonon-Ganta, A.H.. 1986. Biology of Epidinocarsis (= Apoanagyrus) lopezi (Hymenoptera: Encyrtidae) an exotic parasite of the cassava mealybug, Phenacoccus manihoti (Homoptera: Pseudococcidae) in Nigeria. Entomophaga 31: 251–260.CrossRefGoogle Scholar
Ruberson, J.R., Tauber, M.J., and Tauber, C.A.. 1989. Intraspecific variability in hymenopteran parasitoids: Comparative studies of two biotypes of the egg parasitoid Edovum puttleri (Hymenoptera: Eulophidae). Journal of the Kansas Entomological Society 62: 189–202.Google Scholar
Schulthess, F., Baumgärtner, J.U., and Herren, H.R.. 1987. Factors influencing the life table statistics of the cassava mealybug Phenacoccus manihoti. Insect Science and its Application 8: 851–856.Google Scholar
Singh, R., and Srivastava, P.N.. 1989. Life table studies of an aphid hyperparasitoid Alloxysta pleuralis (Cameron) (Hym., Alloxystidae). Journal of Applied Entomology 107: 351–356.CrossRefGoogle Scholar
Tripathi, R.N., and Singh, R.. 1990. Fecundity, reproductive rate, longevity and intrinsic rate of increase of an aphidiid parasitoid Lysiphlebia mirzai. Entomophaga 35: 601–610.CrossRefGoogle Scholar
Umeh, E.-D.N. 1988. Development, oviposition, host feeding and sex determination in Epidinocarsis lopezi (De Santis) (Hymenoptera: Encyrtidae). Bulletin of Entomological Research 78: 605–611.CrossRefGoogle Scholar
van Dijken, M.J., Neuenschwander, P., van Alphen, J.J.M., and Hammond, W.N.O.. 1991. Sex ratios in field populations of Epidinocarsis lopezi, and exotic parasitoid of the cassava mealybug in Africa. Ecological Entomology 16: 233–240.CrossRefGoogle Scholar
van Lenteren, J.C., van Vianen, A., Gast, H.F., and Kortenhoff, A.. 1987. The parasite–host relationship between Encarsia formosa Gahan (Hymenoptera: Aphelinidae) and Trialeurodes vaporariorum (Westwood) (Homoptera: Aleyrodidae). XVI. Food effects on oogenesis, oviposition, life-span and fecundity of Encarsia formosa and other hymenopterous parasites. Journal of Applied Entomology 103: 69–84.CrossRefGoogle Scholar
van Lenteren, J.C., and Woets, J.. 1988. Biological and integrated control in greenhouses. Annual Review of Entomology 33: 239–269.CrossRefGoogle Scholar