Sex pheromone of the flax budworm, Heliothis maritima adaucta Butler (Lepidoptera : Noctuidae)

概要

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Sex pheromone of the flax budworm, Heliothis maritime, adaucta, was extracted from abdominal tips of virgin females using hexane. Three EAD-active peaks were detected in the extract by the GC-EAD method. These peaks were identified to be (Z)-11-hexadecenal (Z11-16 : Ald), (Z)-11-hexadecen-1-o1 (Z11-16 : OH), and n-hcxadecanal (n-16 : nAld) by GC-MS analysis. The ratio of Z11-16 : Ald, Z11-16 : OH, and n-16 : Ald was 100 : 24.5 : 2.4, and the amount of Z11-16 : Ald was about 18.1 ng per female. Mixtures of Z11-16 : Ald and Z11-16 : OH in ratios of 100 : 1-6 attracted males in the field, but the each compound alone did not. White rubber septa impregnated with 1.01 mg and 3.03 mg of a mixture of Z11-16 : Ald and Z11-16 : OH in a ratio of 100 : 1 could capture more males than those with smaller doses. Addition of n-16 : Ald to binary mixtures did not increase their attraction activity. Therefore, Z11-16 : Ald and Z11-16 : OH were concluded to be essential components of the sex pheromone of H. m. adaucta for male attraction. Also, addition of (Z)-9-hexadecenal, a pheromone component in a subspecies in Hungary, to the above binary mixture did not increase the attraction activity.
2003-02-25