HOST SEARCHING BEHAVIOUR OF MAIN INSECT PARASITOIDS ASSOCIATED WITH OLEANDER SCALE, Aspidiotus nerii (BOUCHE) (HOMOPTERA: DIASPIDIDAE). | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 1, Volume 29, Issue 10, October 2004, Page 5847-5854 PDF (2.07 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2004.240015 | ||||
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| Authors | ||||
| A. I. Abd EI- Kareim,; A. H. Abdel- Salam; N. F. Abdel- Baky; M. H. Bayoumy | ||||
| Economic Entomology Dept., Faculty of Agric., Mansoura Univ., Mansoura, Egypt | ||||
| Abstract | ||||
| Searching rate, mutual interference, functional response and killing power of two hymenopterous parasitoids (Encarsia citrin a Craw. and Habro/ep < /em>is asp < /em>idioti Com per & Annecke) as bio- control agents against the diaspidid scale, Aspidiotus nerii (Bouche) were estimated, at Mansoura district. The endoparasitoids, E. citrina and H. asp < /em>idioti showed differences in their searching interfered rates and interfered values with increasing parasitoid density. Encarsia citrina females showed relatively higher searching rate in comparison with H. asp < /em>idioti, while the mutual interference value of E. citrina was decreased by increasing parasitoid density in comparison with H. aspidioti under laboratory and field condition. Encarsia citrin a females exhibited a weak functional response to increasing host density by laying increasing numbers of eggs. While H. asp < /em>idioti females exhibited a high positive functional responses to increasing host density. Encarsia citrina recorded the highest k- value at the lowest host density, while the lowest value was obtained at the highest host density. In respect to H. aspidioti, the efficiency of the parasitoid was increased by increasing the host density. However, the killing power (k- value) was increased by host increase. | ||||
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