Acta Entomologica Sinica (2009) 52, 656-664

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Archna, A.K. Singh, A.V.N. Paul and Anju Jain (2009)
Synomonal effect of nine varieties and one culture of rice on Trichogramma japonicum Ashmead and Trichogramma chilonis (Ishii) (Hymenoptera: Trichogrammatidae)
Acta Entomologica Sinica 52 (6), 656-664
Abstract: Bioassays of the hexane extracts of nine varieties viz., Pusa Sugandh-2, Pusa Basmati-1, Pusa-2511, Pusa Basmati-370, Pusa-1077, Karnal Local, PRR-78, Jaya, Pusa-1238 and one culture of rice, Culture No.34 in vegetative and flowering phase were carried out in Petri dish, to observe their synomonal effect on mean parasitoid activity index (PAI) and mean percent parasitism by Trichogramma japonicum, Ashmead and Trichogramma chilonis (Ishii). The hexane extracts of different rice varieties were subjected to gas liquid chromatography to determine the saturated hydrocarbons. Among these, leaf extracts from variety Pusa Sugandh-2 elicited maximum response in vegetative phase for both the parasitoids by way of mean percent parasitism. Whereas in flowering phase variety Pusa Basmati-1 elicited maximum mean percent parasitism. Gas liquid chromatography of the leaf extracts from vegetative phase revealed that Pusa Sugandh-2 had two favorable hydrocarbons pentacosane (C25) and nonacosane (C29). Gas liquid chromatography of leaf extract from flowering stage also revealed that Pusa Basmati-1 had three favorable hydrocarbons viz., pentacosane (C25), hexacosane (C26) and nonacosane (C29) which could be ascribed to the highest response elicited by these varieties.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): A.V. Navarajan Paul

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


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Corcyra cephalonica Rice (Oryza)
Trichogramma chilonis (parasitoid) Corcyra cephalonica Rice (Oryza)
Trichogramma japonicum (parasitoid) Corcyra cephalonica Rice (Oryza)