Hostname: page-component-7479d7b7d-t6hkb Total loading time: 0 Render date: 2024-07-13T18:47:43.978Z Has data issue: false hasContentIssue false
  • English
  • Français

Competition and the superparasitism of Spodoptera littoralis (Boisd.) larvae by Microplitis rufiventris Kok.

Published online by Cambridge University Press:  27 March 2009

E. M. Hegazi  and
M. A. Shabaan
E. M. Hegazi
Affiliation:
Faculty of Agriculture, University of Alexandria, Alexandria, Egypt
M. A. Shabaan
Affiliation:
Faculty of Agriculture, University of Alexandria, Alexandria, Egypt
Get access Rights & Permissions [Opens in a new window]

Summary

An experiment to compare the effect of diverse ratios of 0–6 h old Microplitis rufiventris Kok. progeny within Spodoptera littoralis (Boisd.) larvae is described and the results discusssed. Five to 21% of parasite progeny was eliminated during the egg stage. Surplus parasite larvae were eliminated mainly by physical attack, physiological suppression and perhaps by encapsulation. Parasite larvae which escaped competition during their first instar were subjected to physiological suppression. Some of the super-numerary parasite larvae other than the winners survived competition mechanisms and developed in the host haemocoele. Nevertheless, most of these parasites suffered from moulting failure and emergence problems at the end of their endoparasitic development. The development of the winning parasite was retarded by 1–2 days during its egg-larval stage while the duration of its pupal stage was about the same as parasites from singly parasitized hosts.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 103 , Issue 1 , August 1984 , pp. 181 - 187
Copyright
Copyright © Cambridge University Press 1984

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

Ables, J. R. & Vinson, S. (1981). Regulation of host larval development by the egg-larval endoparasitoid Chelonus insularis (Hym.: Braconidae). Enlomophaga 26, 453–458.CrossRefGoogle Scholar
El-Minshawy, A. M. (1963). Studies on the morphology and biology of Spodoptera exigua Hb. and Spodoptera latebrosa Led. in Alexandria. M.Se. thesis, Faculty of Agriculture, University of Alexandria, Egypt.Google Scholar
Hammad, S. M., El-Minshawy, A. M. & Salama, A. (1965). Studies on Microplitis rufiventris Kok. (Hym., Braconidae). Bulletin of the Entomological Society of Egypt XLIX, 215–219.Google Scholar
Hegazi, E. M. (1976). Further studies on certain natural enemies attacking the cotton leafworm in Alexandria. Ph.D. thesis, Faculty of Agriculture, University of Alexandria, Egypt.Google Scholar
Hegazi, E. M., El-Minshawy, A. M. & Hammad, S. M. (1977). Mass rearing of the Egyptian cotton leafworm Spodoptera littoralis (Boisd.) on semi-artificial diet. Proceedings of the 2nd Arab Pesticide Conference, Tanta University.Google Scholar
Hegazi, E. M., Hammad, S. M., Altahtawy, M.El-Sawaf, S. K. (1973). Parasites of the larval stage of the cotton leafworm Spodoptera littoralis (Boisd.) (Noctuidae, Lepidoptera) in Alexandria region. Zeitschrift für Angewandte Enlomologie 74, 332–336.CrossRefGoogle Scholar
Ibrahim, M. & Tawfik, K. (1975). A report on the survey of natural enemies attacking the American bollworm. Agricultural Research Center, Plant Protection Research Institute, Cairo. (In Arabic).Google Scholar
Salt, G. (1961). Competition among insect parasitoids. Symposia of the Society for Experimental Biology 15, 96–119.Google Scholar
Shalaby, F. F. (1968). Morphology of immature stages and bionomie studies on Microplitis rufiventris Kok. M.Sc. thesis, Faculty of Agriculture, University of Alexandria, Egypt.Google Scholar