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Development, oviposition, host feeding and sex determination in Epidinocarsis lopezi (De Santis) (Hymenoptera: Encyrtidae)

Published online by Cambridge University Press:  10 July 2009

Ethel-Doris N. Umeh
Ethel-Doris N. Umeh
Affiliation:
Anambra State University of Technology, Awka Campus, Nigeria
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Abstract

Epidinocarsis lopezi (De Santis) was found to parasitize and complete development in all developmental instars of its host, Phenacoccus manihoti Matile-Ferrero. However, parasitoid mortality was high (15·8%) when development took place in the first nymphal instar of the host. Complete development from egg to adult emergence was prolonged in smaller hosts, and developmental periods recorded were 18·8, 17·4, 16·1 and 14·9 days for the first, second, third and fourth nymphal instars, respectively. Irrespective of the age of the host parasitized (with which size is strongly correlated), E. lopezi completed only one life-cycle during one life-cycle of P. manihoti. Oviposition commenced within 24 h of emergence and lasted effectively for six days, during which 95% of its eggs were laid and 10·8 large hosts were killed through host feeding. Unmated females of E. lopezi are arrhenotokous, laying only male eggs; eggs laid by mated females produced males and females in the ratio of 1:3 in favour of females.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 78 , Issue 4 , December 1988 , pp. 605 - 611
Copyright
Copyright © Cambridge University Press 1988

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References

Askew, R. R. & Shaw, M. R. (1986). Parasitoid communities: their size, structure and development.—pp. 225–264 in Waage, J. & Greathead, D. (Eds). Insect parasitoids. 13th Symposium of the Royal Entomological Society of London 18–19 September 1985 at the Department of Physics Lecture Theatre, Imperial College, London.—389 pp. London Academic Press.Google Scholar
Albuquerque, M. D. (1977). Mealybug attack on cassava in Amazonia.—p. 207 in Cock, J., MacIntyre, R. & Graham, M. (Eds). Proceedings of the Fourth Symposium of the International Society for Tropical Root Crops held at CIAT, Cali, Colombia, 1–7 08 1976.—277 pp. Ottawa, Int. Dev. Res. Cent. (IDRC-080e).Google Scholar
Cox, J. M. & Williams, D. J. (1981). An account of cassava mealybugs (Hemiptera: Pseudococcidae) with a description of a new species.—Bull. ent. Res. 71, 247–258.CrossRefGoogle Scholar
De Bach, P. (1943). The importance of host-feeding by adult parasites in the reduction of host populations.—J. econ. Ent. 36, 647–658.CrossRefGoogle Scholar
Edwards, R. L. (1954). The effect of diet on egg maturation and resorption in Mormoniella vitripennis (Hymenoptera, Pteromalidae).—Q. Jl microsc. Sci. 95, 459–468.Google Scholar
Ekbom, B. S. (1977). Development of a biological control program for greenhouse whiteflies (Trialeurodes vaporariorum Westwood) using its parasite Encarsia formosa (Gahan) in Sweden.—Z. angew. Ent. 84, 145–154.CrossRefGoogle Scholar
Flanders, S. E. (1935). Effect of host density on parasitism.—J. econ. Ent. 28, 898–900.Google Scholar
Flanders, S. E. (1941). Peculiar habits of beneficial insects.—Calif. Citrogr. 26, 285–306.Google Scholar
Flanders, S. E. (1942). Oösorption and ovulation in relation to oviposition in the parasitic Hymenoptera.—Ann. ent. Soc. Am. 35, 251–266.Google Scholar
Flanders, S. E. (1946). Control of sex and sex-limited polymorphism in the Hymenoptera.—Q. Rev. Biol. 21, 135–143.Google Scholar
Ganga, T. (1984). Possibilité de regulation des populations de la cochenille du manioc Phenacoccus manihoti MAT-FERR. (Hom. Pseudococcidae) par un entomophage exotique Epidinocarsis lopezi = Apoanagyrus? lopezi De Santis (Hym. Encyrtidae) en République Populaire du Congo.—Brazzaville, Peoples Republic of Congo (Rep. Office Rech. Scient. Tech. OutreMer (ORSTOM)).Google Scholar
Herren, H. R. (1981). Biological control of cassava mealybug.—pp. 79–80 in Terry, E. R., Oduro, K. A. & Caveness, F. (Eds). Tropical root crops: research strategies for the 1980s. Proceedings of the First Triennial Root Crops Symposium of the International Society for Tropical Root Crops—Africa Branch, 8–12 09 1980, Ibadan, Nigeria.—279 pp. Ottawa, Int. Dev. Res. Cent. (IDRC-163e).Google Scholar
Iheagwam, E. U. (1981). The influence of temperature on increase rates of the cassava mealybug Phenacoccus manihoti Mat.-Ferr. (Homoptera, Pseudococcidae).—Rev. Zool. afr. 95, 959–967.Google Scholar
IITA (International Institute of Tropical Agriculture) (1982). Research highlights for 1981.—72 pp. Ibadan, Nigeria.Google Scholar
IITA (International Institute of Tropical Agriculture) (1984). Project report.—32 pp. Ibadan, Nigeria.Google Scholar
Jervis, M. A. & Kidd, N. A. C. (1986). Host-feeding strategies in hymenopteran parasitoids.—Biol. Rev. 61, 395–434.CrossRefGoogle Scholar
Madueke, E. D. N. N. (1979). Biological control of Trialeurodes vaporariorum.—Ph.D. thesis, Univ. Cambridge, UK.Google Scholar
Neuenschwander, P. & Madojemu, E. (1986). Mortality of the cassava mealybug, Phenacoccus manihoti Mat.-Ferr. (Hom., Pseudococcidae), associated with an attack by Epidinocarsis lopezi (Hym. Encyrtidae).—Mitt. schweiz. ent. Ges. 59, 57–62.Google Scholar
Nwanze, K. F. (1978). Biology of the cassava mealybug, Phenacoccus manihoti Mat.-Ferr. in the Republic of Zaire.—pp. 20–28 in Nwanze, K. F. & Leuschner, K. (Eds). Proceedings of the International Workshop on the Cassava Mealybug, Phenacoccus manihoti Mat.-Ferr. (Pseudococcidae) held at INERA-M’vuazi, Bas-Zaire, Zaire 06 26–29 1977.—85 pp. Ibadan, Nigeria, Int. Inst. Trop. Agric. (Proc. Ser. no. 1).Google Scholar
Silva, A. B. (1975). Phenacoccus sp. a nova praga que ataca as ponteiras da mandioca no estado do Pará.—1 p. Brazil, Comunicado Tecnico EMBRAPA (mimeographed).Google Scholar
Silva, A. B. (1977). Cochonilha das ponteiras da mandioca Phenacoccus sp.—An. Soc. entomol. Bras. 6, 315–317.Google Scholar