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téméphos (organophosphoré)

Annales de Limnologie - International Journal of Limnology (1)

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Efficacité des traitements chimique et biologique sur les Culicidae :effet létal du téméphos et taux de consommationpar Gambusia affinis
S. Bouallam, A. Maarouf, A. Bouzidi, A. Badri
Journal:

Annales de Limnologie - International Journal of Limnology / Volume 34 / Issue 1 / March 1998

Published online by Cambridge University Press:

01 February 2009, pp. 99-105

Print publication:

March 1998
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Dans ce travail, la lutte chimique anti-larvaire a été réalisée au laboratoire chez deux espèces culicidiennes Anopheles hispaniola,vecteur potentiel du paludisme (Guy 1963), et Culex pipiens. Dans ces essais, nous avons utilisé le téméphos, larvicide organophosphoré,sous forme liquide 500 EC (Concentration Emultionnable). Dans ces conditions, un litre de produit commercialcontient 500 g de produit actif (500 g.l-1).Cette étude a montré que la CL50 (30mn) pour le stade L2 est de 21 µg.l-1 chez A.hispaniola et de 10 µg.l-1 chez C. pipiens ;La CL50 (60mn) au stade L4 est respectivement de 23 µg.l-1 et 12 µg.l-1.Le taux de consommation des larves d'A.hispaniola (stade L4) par Gambusia affinis varie en fonction des milieux étudiés maisreste toujours plus élevé chez les femelles que chez les mâles.