Repellency of tsetse-refractory waterbuck (Kobus defassa) body odour to Glossina pallidipes (Diptera: Glossinidae): assessment of relative contribution of different classes and individual constituents

Acta Tropica
Mathew K BettA Hassanali

Abstract

Our earlier studies on the comparative behavioural responses of caged savanna tsetse (Glossina morsitans morsitans and Glossina pallidipes) on a preferred host (ox) and a non-host (waterbuck) suggested the presence of allomonal constituents on the latter. Follow up comparison of the compositions of odours of waterbuck with those of ox and buffalo led to the identification of a series of compounds (15) specific to waterbuck, including straight chain carboxylic acid (C5-C10), phenols (guaiacol and carvacrol), 2-alkanone homologues (C8-C12), geranylacetone and δ-octalactone. Behavioural studies in a windtunnel in the laboratory suggested that G. m. morsitans was repelled by a synthetic blend of waterbuck-specific constituents. In the present study, the effects of different blends of these compounds on catches of mixed sexes of G. pallidipes in attractant-baited NG2G traps were evaluated in the field. Each multicomponent class of constituents (acids, ketones and phenols) was found to reduce fly catches, but a 14-component blend of all these compounds was more effective (reduced catches by 79-85%), indicating that each of these classes of compounds contributes incrementally to the repellency of the waterbuck odour. However, subtract...Continue Reading

References

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Citations

Oct 19, 2017·PLoS Neglected Tropical Diseases·Rajinder K SainiChristian W Borgemeister
Jun 11, 2019·PLoS Neglected Tropical Diseases·Olabimpe Y OlaideBaldwyn Torto
Jun 26, 2020·Frontiers in Cellular Neuroscience·Souleymane DialloMerid N Getahun
Oct 10, 2018·Experimental & Applied Acarology·Margaret W KariukiMargaret M Ng'ang'a
Aug 23, 2018·Revista brasileira de parasitologia veterinária = Brazilian journal of veterinary parasitology : Órgão Oficial do Colégio Brasileiro de Parasitologia Veterinária·Jaires Gomes de Oliveira FilhoLígia Miranda Ferreira Borges

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