Electrophysiological responses of the male antenna to compounds found in the female sex pheromone gland of Spodoptera exigua, (Huebner) (Lepidoptera: Noctuidae)

• Published in: Applied Entomology and Zoology Vol. 28; no. 4; pp. 489 - 496
• Main Authors: Mochizuki, F. (National Inst. of Sericultural and Entomological Science, Tsukuba, Ibaraki (Japan)), Shibuya, T, Ihara, T, Wakamura, S
• Format: Journal Article
• Language: English
• Published: JAPANESE SOCIETY OF APPLIED ENTOMOLOGY AND ZOOLOGY 1993
• Subjects: ANIMAL PHYSIOLOGY; ATRAYENTES SEXUALES; ATTRACTIF SEXUEL; beet armyworm; FEROMONAS; FISIOLOGIA ANIMAL; Lepidoptera; Noctuidae; PHEROMONE; PHEROMONES; PHYSIOLOGIE ANIMALE; SEX ATTRACTANTS; sex pheromone; single sensillum recording; SPODOPTERA EXIGUA
• ISSN: 0003-6862; 1347-605X
• DOI: 10.1303/aez.28.489

Four compounds, (z)-9-tetradecenyl acetate (Z9-14 : Ac), (Z, E)-9, 12-tetradecadienyl acetate (Z9, E12-14: Ac), (Z)-9-tetradecen-1-ol (Z9-14: OH) and (Z, E)-9, 12-tetradecadien-1-ol (Z9, E12-14: OH) were found in sex pheromone extracts of female Spodoptera exigua from Japan. The ratio of these compounds was 60:98:100:83, respectively. Electroantennogram analysis of male moths to these four compounds suggests that receptor cells for these compounds are present in their antenna. Single sensillum recordings from male-specific trichodea (type-1 trichodea) showed that the sensitivity of type-B cells (Z9-14 : OH receptor cells) to Z9, E12-14: OH was not significantly different from the sensitivity to Z9-14: OH, whereas the threshold of type-A cells (Z9, E12-14: Ac receptor cells) to Z9-14: Ac was 1, 000 times higher than the sensitivity to Z9, E12-14: Ac. Z9, E12-14: OH was suggested to have some activity as a sex pheromone component in the Japanese population of S. exigua.