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Responses of tsetse flies (Diptera: Glossinidae) to natural and synthetic ox odours

Published online by Cambridge University Press:  10 July 2009

S.J. Torr*
Affiliation:
ODA Insect Pest Management Initiative, c/o Tsetse and Trypanosomiasis Control Branch, Harare, Zimbabwe
D.R. Hall
Affiliation:
Natural Resources Institute, Chatham, UK
J.L. Smith
Affiliation:
Natural Resources Institute, Chatham, UK
*
Dr S.J. Torr, NRI, Central Avenue. Chatham Maritime, Kent, ME4 4TB, UK.

Abstract

In Zimbabwe, studies were made of the levels of known tsetse attractants present in natural ox odour. Typically an ox (400 kg) produced phenol (0.1 mg/h), 3-methylphenol (0.09 mg/h), 4-methylphenol (0.7 mg/h), 3-ethylphenol (0.01 mg/h), 4-ethylphenol (0.02 mg/h), 3- and 4-n-propylphenol (0.02 mg/h), l-octen-3-ol (0.01 mg/h), carbon dioxide (140 l/h), acetone (5 mg/h) and butanone (0.3 mg/h). Of these, only phenol, 4- and 3-methylphenol and carbon dioxide were always detected in ox odour. Studies were made of the numbers of Glossina pallidipes Austen and G. morsitans morsitans Westwood attracted to natural ox odour and synthetic odour, the latter consisting of blends of identified attractants dispensed at the doses naturally present in ox odour. Natural ox odour caught twice (P < 0.05) as many G. pallidipes and 1.5 (P < 0.05) times as many G. m. morsitans as the synthetic blend suggesting the presence of an unidentified attractant in ox odour. Passing ox odour through filters indicated that all attractants can be trapped on a combination of charcoal and sodalime filters but the unidentified attractant(s) may pass through a sodalime filter, and break through a charcoal filter used for more than 6 h. Increasing the dose of ketones in the synthetic odour from 2 to 100 mg/h doubled the catches at the source. Increases in ketone levels in hosts, induced by starvation or possibly trypanosomiasis, may increase attraction of tsetse to such animals.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1995

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References

Anon. (1988) Method No. 69, Organic Methods Evaluation Branch, OSHA Analytical Laboratory, Salt Lake City, Utah, USA.Google Scholar
Bayliss, M. & Nambiro, C.O. (1993) The effect of cattle infection by Trypanosoma congolense on the attraction, and feeding success, of the tsetse fly Glossina pallidipes. Parasitology 106, 357361.CrossRefGoogle Scholar
Bursell, E. (1987) The effect of wind-borne odours on the direction of flight in tsetse flies. Physiological Entomology 12, 149156.CrossRefGoogle Scholar
Bursell, E., Gough, A.J.E., Beevor, P.S., Cork, A., Hall, D.R. & Vale, G.A. (1988) Identification of components of cattle urine attractive to tsetse flies, Glossina spp. (Diptera: Glossinidae). Bulletin of Entomological Research 78, 281291.CrossRefGoogle Scholar
Den Otter, C.J., Tchicaya, T. & Van Den Berg, M.J. (1988) Olfactory sensitivity of five species of tsetse (Glossina spp.) to 1-octen-3-ol, 4-heptanone, 3-nonanone and acetone. Insect Science and its Application 9, 213218.Google Scholar
Hall, D.R., Beevor, P.S., Cork, A., Nesbitt, B.F. & Vale, G.A. (1984) 1-octen-3-ol: a potent olfactory stimulant and attractant for tsetse isolated from cattle odours. Insect Science and its Application 5, 335339.Google Scholar
Hargrove, J.W. & Brady, J. (1992) Activity rhythms of tsetse flies (Glossina spp.) (Diptera: Glossinidae) at low and high temperatures in nature. Bulletin of Entomological Research 82, 321326.CrossRefGoogle Scholar
Hassanali, A., McDowell, P.G., Owaga, M.L.A. & Saini, R.K. (1986) Identification of tsetse attractants from excretory products of a wild host animal, Syncerus caffer. Insect Science and its Application 7, 59.Google Scholar
Laveissiére, C, Vale, G.A. & Gouteux, J.-P. (1990) Bait methods for tsetse control, pp. 4774in Curtis, C.F. (Ed.) Appropriate technology for vector control. Boca Raton, CRC Press Inc.Google Scholar
Okech, M. & Hassanli, A. (1990) The origin of phenolic tsetse attractants from host urine: studies on the pro-attractants and microbes involved. Insect Science and its Application 11, 363368.Google Scholar
Torr, S.J. (1988a) The flight and landing of tsetse (Glossina) in response to components of host odour in the field. Physiological Entomology 13, 453465.CrossRefGoogle Scholar
Torr, S.J. (1988b) The activation of resting tsetse flies (Glossina) in response to visual and olfactory stimuli in the field. Physiological Entomology 13, 315325.CrossRefGoogle Scholar
Torr, S.J. (1990) Dose responses of tsetse flies (Glossina) to carbon dioxide, acetone and octenol in the field. Physiological Entomology 15, 93103.CrossRefGoogle Scholar
Vale, G.A. (1974a) The response of tsetse flies (Diptera; Glossinidae) to mobile and stationery baits. Bulletin of Entomological Research 64, 545587.CrossRefGoogle Scholar
Vale, G.A. (1974b) New field methods for studying the response of tsetse flies (Diptera: Glossinidae) to baits. Bulletin of Entomological Research 64, 199208.CrossRefGoogle Scholar
Vale, G.A. (1977) Field responses of tsetse flies (Diptera: Glossinidae) to odours of men, lactic acid and carbon dioxide. Bulletin of Entomological Research, 69, 459467.CrossRefGoogle Scholar
Vale, G.A. (1980) Field studies of the responses of tsetse flies (Glossinidae) and other Diptera to carbon dioxide, acetone and other chemicals. Bulletin of Entomological Research 70, 563570.CrossRefGoogle Scholar
Vale, G.A. (1981) An effect of host diet on the attraction of tsetse flies (Diptera: Glossinidae) to host odour. Bulletin of Entomological Research 71, 259265.CrossRefGoogle Scholar
Vale, G.A. & Hall, D.R. (1985) The role of 1-octen-3-ol, acetone and carbon dioxide in the attraction of tsetse flies, Glossina spp. (Diptera: Glossinidae), to host odour. Bulletin of Entomological Research 75, 209217.CrossRefGoogle Scholar
Vale, G.A., Hall, D.R. & Gough, A.J.E. (1988a) The olfactory responses of tsetse flies, Glossina spp. (Diptera: Glossinidae), to phenols and urine in the field. Bulletin of Entomological Research 78, 293300.CrossRefGoogle Scholar
Vale, G.A., Lovemore, D.F., Flint, S. & Cockbill, G.F. (1988b) Odour-baited targets to control tsetse flies, Glossina spp. (Diptera; Glossinidae), in Zimbabwe. Bulletin of Entomological Research 78, 3149.CrossRefGoogle Scholar
Willemse, L. (1991) A trial of odour baited targets to control the tsetse fly, Glossina morsitans centralis (Diptera: Glossinidae), in Zimbabwe. Bulletin of Entomological Research 81, 351357.CrossRefGoogle Scholar