Sex recognition pheromone in the West African tsetse fly, Glossina palpalis palpalis (Robineau-Desvoidy)

Offor, I. I.; Carlson, David A.; Gadzama, Njidda M.; Bozimo, H. T.

doi:10.1017/s1742758400000795

Cited by 6 publications

(3 citation statements)

References 13 publications

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“…Also, a compound, with a similar structure to the pheromone was described by McDowell et al (1981) and has since been found to have sex pheromone activity in this species (unpublished observations). Progress is being made towards identification of the pheromone in G. palpalis (Offor et al, 1980). However, as yet no use has been found for these compounds to manipulate the sexual behaviour of the appropriate species in the field.…”

Section: Prospects For Tsetse Control Using Pheromonesmentioning

confidence: 99%

Aspects of the regulation of mating behaviour in tsetse

Langley

Hall

1984

Int. J. Trop. Insect Sci.

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The importance of maximum rates of insemination in female tsetse is emphasized in relation to their low rate of reproduction and to the possibility that density dependent regulation of tsetse populations may not be as rigorous as in many oviparous insects. Observations on the mating behaviour of tsetse are described and its regulation by sex pheromones which serve to identify females of the species is discussed. Laboratory and field experiments have shown that the sexual activity of G. m. morsitans males can be manipulated by presentation of synthetic sex pheromone on suitable decoys in the laboratory and in the field. Males that respond to decoys in the field are in the same nutritional state as others which are attracted to the models upon which the decoys are placed and are presumably seeking food. There is no reason to believe that sexual activity is restricted to a particular section of the population, and given a choice, it is proposed that mating is preferable to feeding in terms of gene survival for the individual male. The durations of copulatory responses are dose dependent and there is some evidence that they are inversely proportional to the frequency of encounters with decoys and hence to the density of flies. Techniques for the reduction of tsetse populations using sex pheromones in conjunction with suitable decoys and chemosterilants are being developed. The availability of pheromones in large quantities will permit their testing as sexual confusants among males and may lead to interspecific matings where more than one species occupies the same habitat.

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Section: Prospects For Tsetse Control Using Pheromonesmentioning

confidence: 99%

Aspects of the regulation of mating behaviour in tsetse

Langley

Hall

1984

Int. J. Trop. Insect Sci.

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“…A sex pheromone present in extracts of female G. palpalis palpalis Rob‐Des produced copulatory activity in males (Offor et al ., 1981), and a synthetic trimethyl‐branched C35 alkane showed stimulatory activity (D. A. Carlson, unpublished data). A sex pheromone that released copulatory activity in male G. tachinoides (Westwood) was isolated from extracted female hydrocarbons.…”

Section: Introductionmentioning

confidence: 99%

Sex pheromone of the tsetse species, Glossina austeni: isolation and identification of natural hydrocarbons, and bioassay of synthesized compounds

Carlson

Mramba²,

Sutton

et al. 2005

Medical Vet Entomology

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Copulatory responses of male Glossina austeni (Newstead) (Diptera: Glossinidae), that were elicited after contact with frozen female tsetse, were not observed after solvent washing of cuticular lipids. Chromatographic analysis of extracts from laboratory-reared and field-collected G. austeni females yielded natural hydrocarbons that were highly stimulatory to males. Most of this activity was produced by compounds in the alkene fraction. Gas chromatograms (GC) contained five natural alkenes; these were separated by preparative GC for bioassays conducted in Tanzania. The two major alkenes were identified using gas chromatography-mass spectrometry (GC-MS) to be 13,17-dimethyltritriacont-1-ene and 13,17-dimethylpentatriacont-1-ene, after the samples had undergone derivatization using dimethyl disulphide and saturation with deuterium. These alkenes and natural alkanes were quantified from G. austeni of both sexes from laboratory and field samples to confirm that their presence was consistent in this species. Trials of synthetic samples resulted in the order of biological activity for the stereoisomers of 13,17-dimethyltritriacont-1-ene as follows: S,R-33:1 > R,S- 33:1 > S,S-33:1 > R,R-33:1. Dose-response data showed an ED(50) at 5 microg per treated, solvent-washed male decoy. Of the four stereoisomers of 13,17-dimethylpentatriacont-1-ene, R,R-35:1 showed the most activity. This is the first report of alkene-induced sexual activity in males of the genus Glossina.

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“…Since then, they have been investigated in a number of species including Glossina pallidipes ( Nairobi, Kenya. et al, 1982;Leegwater-van der Linden & Carlson, 1982;McDowell et at., 1981;McDowell & Hassanali, 1983), G.awteni (Huyton et al, 1980b) and G.palpalis palpalis (Offor et al, 1981) Experimental evidence for the correct identity of the G.pallidipes pheromone as 13,23dimethylpentatriacontane, and its synthesis was given by and Carlson et al (1984). The use of these pheromones in control applications has been suggested and combination of the pheromone with chemosterilants has been investigated in the field .…”

Section: Introductionmentioning

confidence: 99%

Activity of the diastereoisomers of 13,23‐dimethylpenta‐triacontane, the sex pheromone of Glossina pallidipes, and comparison with the natural pheromone

McDowell¹,

Hassanali²,

Dransfield³

1985

Physiological Entomology

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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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Sex recognition pheromone in the West African tsetse fly, Glossina palpalis palpalis (Robineau-Desvoidy)

Cited by 6 publications

References 13 publications

Aspects of the regulation of mating behaviour in tsetse

Aspects of the regulation of mating behaviour in tsetse

Sex pheromone of the tsetse species, Glossina austeni: isolation and identification of natural hydrocarbons, and bioassay of synthesized compounds

Activity of the diastereoisomers of 13,23‐dimethylpenta‐triacontane, the sex pheromone of Glossina pallidipes, and comparison with the natural pheromone

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