BIOASSAY STUDIES ON THE EFFECT OF ESSENTIAL OILS ON THE FEMALE ORIENTAL FRUIT FLY, Bactrocera dorsalis (Hendel) (DIPTERA : TEPHRITIDAE)
10.798%). Bioassay studies on the effects of the essential oils showed that significantly more number of female adults of B. dorsalis alighted on filter paper treated with hinoki oil, (R)-(+)-limonene, and eucalyptus oil at 400ppm. However, cinnamon was found to inhibit or repel alighting of the female adults at a dosage of 200ppm (p = 0.001), 400ppm (p = 0.0001) and 800ppm (p = 0.0001). A similar repellent activity was observed when filter paper was treated with essential oils extracted from Litsea leaves. The calculated preference showed that hinoki was the most preferred essential oil (50.91%), which stimulated the alighting response of B. dorsalis at 100ppm.
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