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Applied Entomology and Zoology
Kehat, M., Division of Entomology, A.R.O., Volcani Center, Bet Dagan, Israel
Greenberg, S., Division of Entomology, A.R.O., Volcani Center, Bet Dagan, Israel
Tamaki, Y., Division of Entomology, National Institute of Agricultural Sciences, Nishigahara, Tokyo 114, Japan
Different formulation of the synthetic female sex pheromone of Spodoptera littoralis were evaluated in the field. A trap baited with 1 mg of cis-9, trans-11-tetradecadienyl acetate (72% active isomer) alone adsorbed in a rubber septum was equivalent in effectiveness to a trap baited with virgin females for at least 77 days. The purified attractant (92% active isomer), however, was significantly less efficient in attractiveness than the partially purified synthetic attractant (72% active isomer). The addition of a small amount of cis-9, trans-12-tetradecadienyl acetate to the purified attractant strongly enhanced the attraction. However, cis-9, trans-12-tetradecadienyl acetate had no synergistic effect when added to the partially purified attractant. The addition of increased amounts of cis-9, trans-12-tetradecadienty acetate markedly reduced the catch of male moths. The combination of 4.8-mg attractant (97% purity) with 12-mg antioxidant adsorbed on a filter paper was somewhat less efficient in attractiveness than virgin females. © 1976, JAPANESE SOCIETY OF APPLIED ENTOMOLOGY AND ZOOLOGY. All rights reserved.
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Field Evaluation of the Synthesis Sex Pheromone, as an Attractant for Males of the Cotton Leafworm Spodoptera littoralis (Boisd.), in Israel
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Kehat, M., Division of Entomology, A.R.O., Volcani Center, Bet Dagan, Israel
Greenberg, S., Division of Entomology, A.R.O., Volcani Center, Bet Dagan, Israel
Tamaki, Y., Division of Entomology, National Institute of Agricultural Sciences, Nishigahara, Tokyo 114, Japan
Field Evaluation of the Synthesis Sex Pheromone, as an Attractant for Males of the Cotton Leafworm Spodoptera littoralis (Boisd.), in Israel
Different formulation of the synthetic female sex pheromone of Spodoptera littoralis were evaluated in the field. A trap baited with 1 mg of cis-9, trans-11-tetradecadienyl acetate (72% active isomer) alone adsorbed in a rubber septum was equivalent in effectiveness to a trap baited with virgin females for at least 77 days. The purified attractant (92% active isomer), however, was significantly less efficient in attractiveness than the partially purified synthetic attractant (72% active isomer). The addition of a small amount of cis-9, trans-12-tetradecadienyl acetate to the purified attractant strongly enhanced the attraction. However, cis-9, trans-12-tetradecadienyl acetate had no synergistic effect when added to the partially purified attractant. The addition of increased amounts of cis-9, trans-12-tetradecadienty acetate markedly reduced the catch of male moths. The combination of 4.8-mg attractant (97% purity) with 12-mg antioxidant adsorbed on a filter paper was somewhat less efficient in attractiveness than virgin females. © 1976, JAPANESE SOCIETY OF APPLIED ENTOMOLOGY AND ZOOLOGY. All rights reserved.
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