Abstract
The major alkene of the male tsetse fly,Glossina morsitans morsitans, was isolated for characterization by thin-layer and gas chromatography (GC). The mass spectra of the alkene and the alkene DMDS derivative indicated one isomer, 19,23-dimethyltritriacont-1-ene. The material is present at 1–2μg/male fly and is partially transferred to the female preparatory to or during mating. A dose-dependent antiaphrodisiac effect was seen with exposed male flies using the isolated natural product, with 2 and 4μg causing 80% loss of copulatory attempts, and 10μg extinguishing the attempts. This effect was increased by addition of male-produced alkane. This compound and a 31-carbon homolog also appear inG. m. submorsitans. Similar quantities of alkenes that are species-specific appear in all tsetse males. Structures of male-produced trimethylalkenes that appear in two other species,G. palpalis palpalis andG. fuscipes fuscipes, were investigated.
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Carlson, D.A., Schlein, Y. Unusual polymethyl alkenes in tsetse flies acting as abstinon inGlossina morsitans . J Chem Ecol 17, 267–284 (1991). https://doi.org/10.1007/BF00994332
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DOI: https://doi.org/10.1007/BF00994332