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A trial of a cypermethrin ‘pour-on’ insecticide to control Glossina pallidipes, G. fuscipes fuscipes and G. morsitans submorsitans (Diptera: Glossinidae) in south-west Ethiopia

Published online by Cambridge University Press:  10 July 2009

S.G.A. Leak ,
Woudyalew Mulatu ,
G.J. Rowlands  and
G.D.M. D'Ieteren
S.G.A. Leak*
Affiliation:
International Laboratory for Research on Animal Diseases (ILRAD), Nairobi, Kenya
Woudyalew Mulatu
Affiliation:
Internation Livestock Centre for Africa (ILCA), Ethiopia
G.J. Rowlands
Affiliation:
International Livestock Centre for Africa (ILCA), Nairobi, Kenya
G.D.M. D'Ieteren
Affiliation:
International Livestock Centre for Africa (ILCA), Nairobi, Kenya
*
S.G.A. Leak, International Laboratory for Research on Animal Diseases (ILRAD), PO Box 30709, Nairobi, Kenya.
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Abstract

Tsetse populations and trypanosome prevalence in cattle were monitored from 1986 to 1993 in the Ghibe valley, south-west Ethiopia. From January 1991 to December 1993 between 2000 and 4000 cattle were treated at monthly intervals with a synthetic pyrethroid insecticide, cypermethrin (RS-alpha-cyano-3-phenoxy- benzyl [1RS]-cis, trans -3-[2,2-dichlorovinyl]-2,2-dimethylcyclopropane carboxylate). An approximate dosage of 1 ml per 10 kg bodyweight was used to control tsetse flies (Glossina spp.). Treatments were given as ‘pour-on’ applications along the backlines of animals, using automatic drench-gun applicators. This resulted in a decline of 93% in the apparent density of G. pallidipes Austen. A reduction of 83% in the apparent density of G. morsitans submorsitans Newstead was also observed. This reduction was associated with a reduction in trypanosome prevalence in cattle of over 74% in 1993, despite a high level of resistance to all available trypanocidal drugs. The numbers of Stomoxys spp. (Diptera: Muscidae) and Tabanidae were also significantly reduced (P < 0.01).

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 85 , Issue 2 , June 1995 , pp. 241 - 251
Copyright
Copyright © Cambridge University Press 1995

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