Abstract
Extracts from the abdominal tips of female moths of the cotton caterpillar moth, Diaphania indica (ca. 15.4 ng/female and 7.6 ng/female, respectively) yielded major EAG-active components that were identified as (E)-11-hexadecenal (E11-16 : Ald) and (E, E)-10, 12-hexadecadienal (E10E12-16 : Ald). Hexadecanal (16 : Ald) was also found and determined to be at a ca. 2% level compared with Ell-16 : Ald. Mixture of synthetic E10E12-16 : Ald and E11-16 : Ald showed attractiveness to males in the field, although it was inferior to three 2-d-old virgin females. The addition of 16 : Ald at 0.5% to 10% amounts of E11-16 : Ald did not effect the trap catches.
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