Resume-Les films de polyethylene utilises pour la fabrication du piege bipyramidal a mouches tse-tse en Republique Centrafricaine presentent des variations aleatoires dans leur coloration. Des experiences conduites sur Glossina fuscipes fuscipes a l'aide d'un nouveau protocole, combinant dans la meme experience, le carre latin et la competition de deux pieges en vis-a-vis, revelent qu'une coloration legerement moins intense du bleu diminuait significativement l'attractivite du piege. L'utilisation de polyethylene pour la fabrication de piege a mouches tse-tse presente de nombreux avantages mais demande de verifier l'homogeneite de sa coloration.Abstract-The polythene films used in manufacturing bipyramidal tsetse traps in the Central African Republic can exhibit slight variations in colours. Experiments using a new protocol that combines a Latin square design and two competing traps in the same experiment conducted on Glossina fuscipes fuscipes show that a iess intensely blue colouring decreases the attractiveness of the trap. Polythene is useful material for tsetse traps, but is necessary to verify that its colouring is homogeneous.
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