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Field observations on the residual effect of deltamethrin against adult ticks, mainly Rhipicephalus appendiculatus, during a high infestation period in the Southern Province of Zambia

Published online by Cambridge University Press:  19 September 2011

S. M. K. J. Luguru
Affiliation:
Central Veterinary Research Institute, P. O. Box 33980, Lusaka, Zambia
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Abstract

Deltamethrin (IR, 3R)-3(2,2-dibromovinyl)-2, 2-dimethylcyclopropane carboxylate of (S)-alpha-cyano-3-phenoxy-benzyl, was observed in the field in Zambia to offer a better residual effect against adult Rhipicephalus appendiculatus of up to 7 days post-treatment during a high infestation pressure period than on organophosphorus (OP) acaricide. A group of 20 cattle sprayed with deltamethrin wash of approximately 0.005 w/v at 14 days intervals carried an average of less than 12 ticks per head by the 7th day post-treatment, whereas two groups of 20 cattle each, dipped weekly in an OP at 0.05% w/v had an average of over 60 ticks per head. In a theileriosis infected area 14 days' treatment with deltamethrin would probably be unsuitable for disease control during high infestation period, but 7–10 days would probably yield better results than those likely to be obtained with OPs.

Résumé

En Zambie, il a été observé qu'aux périodes d'infestation massive, la Deltamethrine avait un meilleur effet résiduel pouvant excéder 7 jours contre la tique Rhipicephalus appendiculatus par rapport à celui d'un acaricide organophosphoré.

Un lot de 20 bovins pulvérisés avec une solution de Deltamethrine à 0.005% à 14 jours d'intervalle est parasité par moins de 12 tiques/tête en moyenne jusqu'au 7e jour après le traitement. Deux autres lots de 20 bovins chacun subissant des bains à une semaine d'intervalle avec un organophosphoré à 0.5% avaient en moyenne 60 tiques/tête.

Dans une zone où la theileriose constitue une enzootie, un traitement à la deltamethrine à 14 jours d'intervalle ne peut enrayer la maladie au cours d'une période d'infestation massive; si un intervalle de 7 à 10 jours était observé, des résultats meilleurs à ceux observés avec les organophorés pourraient être escomptés.

Type
Part II: Symposium on Insect Pests and Sustainable Food Production: Pest Management, Strategies and Practices
Copyright
Copyright © ICIPE 1991

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References

REFERENCES

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Uclaf, Roussel (1982) Deltamethrin Monograph. Roussel-Uclaf Publication, France, pp. 279281.Google Scholar
Australian Development Assistance Bureau, Ministry of Foreign Affairs (1980) Ticks and Tickborne Diseases Course Notes.Google Scholar