Acta Entomologica Sinica (2003) 46, 745-748

Nasser S. Mandour, Shun-Xiang Ren, Bao-Li Qiu and Sahar Fazal (2003)
Effects of extraction from nymphs, exuviae and adults of Bemisia tabaci B biotype on the behavior of Encarsia bimaculata Heraty et Polaszek (Hymenoptera : Aphelinidae)
Acta Entomologica Sinica 46 (6), 745-748
Abstract: The response of female Encarsia bimaculata Heraty et Polaszek to its host, Bemisia tabaci (Gennadius) nymph, exuviae or adult extractions was bioassayed in a petri dish arena. The tested materials were extracted by hexane, ethanol and water. The data show that females spent much longer times searching in treated patches than controls. The parasitoids intensified their search in the treated patches and exhibited both orthokinetic and klinotaxic responses. The highest mean of the retention time in the treated patches was in those treated with material extracted from nymphs with water (111.23 seconds), otherwise parasitoids spent equal time in treated patches irrespective of the concentrations of the tested materials. Such kairomones might enhance female searching efficiency and guide them to hosts.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Shun-Xiang Ren, Bao-Li Qiu

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution
environment/habitat manipulation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Bemisia tabaci biotype MEAM1		China (south)
Encarsia bimaculata (parasitoid)	Bemisia tabaci biotype MEAM1		China (south)