Activity of the diastereoisomers of 13,23-dimethylpenta-triacontane, the sex pheromone of Glossina pallidipes, and comparison with the natural pheromone (original) (raw)

1985, Physiological Entomology

All three synthetic diastereoisomers of 13,23-dimethylpentatriacontane, the pheromone of Glossina pallidipes (Austen), have been tested in the G.pa1lidipes sex pheromone bioassay, together with one of the four diastereoisomers of 13,17-dimethylpentatriacontane, originally proposed as a candidate pheromone of G.pallidipes. Of the three isomers of 13,23-dimethylpentatriacontane only the (13R,23S) isomer was active with an ED-50 of 4.47f1.09yg (meankSD). The (13R,17R)-13,17-dimethylpentatriacontane was inactive. The diastereoisomeric mixtures of 13,17-and 13,23-dimethylpentatriacontane were active with ED-50 values of 17.88k1.25 yg and 8.88k1.15 yg respectively. The natural pheromone was active with an ED-50 of 8.07-t 1.17 p g indicating it to be a diastereoisomeric mixture.

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