Sex pheromone of Acrolepiopsis nagaimo Yasuda (Lepidoptera: Acrolepiidae), a predominant leafminer on Chinese yam in Tottori Prefecture: field evaluation and activity of the third component

Sex pheromone of Acrolepiopsis nagaimo Yasuda (Lepidoptera: Acrolepiidae), a predominant leafminer on Chinese yam in Tottori Prefecture: field evaluation and activity of the third component

2001

A:PS

In field tests conducted in Chinese yam fields in Tottori Prefecture of Japan in 1998, maximum catches of A. nagaimo males were obtained at ratios between 50:50 and 75:25 (=natural ratio) when 100 æg of a binary blend of (Z)-11-hexadecenyl acetate (Z11-16:Ac) and (Z)-11-hexadecenal (Z11-16:Ald) was baited in the traps. This attractiveness was apparently enhanced when 1 to 5% of (Z)-11-hexadecen-1-ol (Z11-16:OH) was added. When 2% Z11-16:OH was blended, the synergistic effect was apparent at high doses (?100 æg/septum). The third compound, Z11-16:OH, was therefore confirmed as a sex pheromone component. The optimum blend for male attraction was determined to be 200-1000 æg/septum of a 50:50:2 blend of Z11-16:Ac, Z11-16:Ald and Z11-16:OH, respectively. More than ten times as many males were captured with this blend than with two 2- to 3-day-old virgin females.

v.36(2):203-207, APPLIED ENTOMOLOGY AND ZOOLOGY

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