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Optimized mixture of sex pheromonal components for trapping of maleSpodoptera littoralis in Israel |
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| Authors: | E Dunkelblum M Kehat S Gothilf S Greenberg B Sklarsz |
| Institution: | 1. Div. of Pesticide Residues and Natural Products Chemistry, ARO, The Volcani Center, Bet Dagan 2. Div. of Entomology, ARO, The Volcani Center, Bet Dagan 3. Chemistry Department, Bar-Ilan University, Ramat Gan |
| Abstract: | The sex pheromone gland extracts ofSpodoptera littoralis (Boisd.) in Israel were reexamined by capillary gas chromatography and capillary gas chromatography combined with mass spectrometry. The following compounds were identified: (Z)-9-tetradecenyl acetate (46%), (Z,E)-9,11-tetradecadienyl acetate (33%), (Z,Z)-9,11-tetradecadienyl acetate (4%), (E)-11-tetradecadienyl acetate (9%), (Z)-11-tetradecenyl acetate (7%), and (Z,E)-9,12-tetradecadienyl acetate (0.5-1%). Field tests with various combinations of the major attractant (Z,E)-9,11-tetradecadienyl acetate and the minor components indicated that the best lure forS. littoralis in Israel is 2 mg (Z,E)-9,11-tetradecadienyl acetate containing 0.2-1% of (Z,E)9,12-tetradecadienyl acetate. |
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