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Field trials with the synthetic pyrethroids permethrin, cypermethrin and decamethrin against Glossina (Diptera: Glossinidae) in Nigeria

Published online by Cambridge University Press:  10 July 2009

U. Spielberger
Affiliation:
Tsetse & Trypanosomiasis Division, Federal Livestock Department, PMB 2005, Kaduna, Nigeria.
B. K. Na'isa
Affiliation:
Tsetse & Trypanosomiasis Division, Federal Livestock Department, PMB 2005, Kaduna, Nigeria.
K. Koch
Affiliation:
Tsetse & Trypanosomiasis Division, Federal Livestock Department, PMB 2005, Kaduna, Nigeria.
A. Manno
Affiliation:
Tsetse & Trypanosomiasis Division, Federal Livestock Department, PMB 2005, Kaduna, Nigeria.
P. R. Skidmore
Affiliation:
Wellcome Foundation Limited Ravens Lane, Berkhamsted, UK.
H. H. Coutts
Affiliation:
Shell Research Ltd., Siltingbourne Research Centre Kent, UK.

Abstract

Two years of field trials in Nigeria with the synthetic pyrethroids permethrin, cypermethrin and decamethrin against Glossina palpalis (R.-D.) and G. tachinoides Westw. are described. Laboratory tests were also made against G. morsitans submorsitans Newst. The three pyrethroids were applied successfully from the ground at 0·5%, 0·3% and 0·075%, respectively, to fly resting sites on vegetation using pressurised knapsack sprayers, populations of both species being eradicated after a single application of one insecticide. Following residual spraying from a helicopter, only decamethrin at 30 g/ha achieved complete eradication. It was thought that, with permethrin wettable powder at 200 g/ha, by modifying the spraying equipment and, with cypermethrin, by increasing the dosage to over 150 g/ha, both could be successful in the future. A new ‘sideways’ spraying technique tested using the helicopter gave promising results. Comparatively little harm was done to non-target organisms in the environment after spraying with any of the three pyrethroids, and it is expected that they may gradually replace the chlorinated hydrocarbons in future routine anti-tsetse operations.

Type
Original Articles
Copyright
Copyright © Cambridge University Press 1979

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