Journal of Biological Control

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Studies to identify effective kairomones, their optimum doses and appropriate application techniques with a view to increase the parasitizing efficiency of T. chilonis were conducted during 2005-06 in the laboratory. Fresh hexane extract of Corcyra cephalonica (1%)+hexacosane (0.3%) and C. cephalonica scale extract (1%)+nonacosane (0.3%) were the most attractive and recorded the highest egg parasitization (77.25% in both) when applied in impregnated rubber septa. The second effective kairomone was C. cephalonica scale extract (1%)+pentacosane (0.3%). Kairomone impregnated septa as dispensers proved better over paper strips. No significant difference in parasitizing efficiency was recorded between ochre and orange septa kairomone dispensers.

Keywords

Hexacosane, kairomones, Nonacosane, Pentacosane, Rubber Septa, Scales Extract, Trichogramma chilonis, Tricosane.
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