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Exploiting the heterogeneous drop-off rhythm of Amblyomma variegatum nymphs to reduce pasture infestation by adult ticks

Published online by Cambridge University Press:  05 May 2010

F. STACHURSKI  and
H. ADAKAL
F. STACHURSKI*
Affiliation:
Centre International de Recherche en Agriculture pour le Développement (CIRAD), UMR 15 CIRAD/INRA ‘Contrôle des Maladies’, Campus International de Baillarguet TA-A15/G, 34398MontpellierCedex 5, France Centre International de Recherche-Développement sur l'Elevage en zone Subhumide (CIRDES), BP 454Bobo-Dioulasso 01, Burkina Faso
H. ADAKAL
Affiliation:
Centre International de Recherche-Développement sur l'Elevage en zone Subhumide (CIRDES), BP 454Bobo-Dioulasso 01, Burkina Faso
*
*Corresponding author: Direction Régionale du CIRAD, BP 853, Antananarivo 101, Madagascar. Tel: +261 32 07 235 27. Fax: +261 20 22 408 21. E-mail: frederic.stachurski@cirad.fr
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Summary

Tick distribution depends on the drop-off rhythm of the previous stage and on the suitability for tick survival of the environment where they are disseminated. Studies were implemented in Burkina Faso to assess detachment pattern of engorged Amblyomma variegatum nymphs. Experiments were carried out with naturally infested cattle kept in a paddock or monitored when grazing community pasture. In the pasture, 80% of the nymphs detached between 14.00 h and 17.00 h while less than 25% did so in the paddock. Further investigation was implemented to assess whether the density of adult ticks might be modified by herd management. During the early dry season, zebus grazed in 4 plots fenced in natural savannahs and fallows. Two of the plots were used in the morning and the two others in the afternoon. Six months later, zebus were put in these plots, in turn, on 9 occasions. The number of A. variegatum adults picked up by the cattle in each plot was highly variable: they captured more ticks in the plots installed on good lush savannah and 3-fold more ticks in those where the herd had grazed in the afternoon during the previous dry season. An integrated tick control strategy taking these results into account is proposed.

Keywords

Amblyomma variegatumcattledrop-off rhythmherd managementintegrated tick control
Type
Research Article
Information
Parasitology , Volume 137 , Issue 7 , June 2010 , pp. 1129 - 1137
Copyright
Copyright © Cambridge University Press 2010

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