Résumé
L'étude en différentes conditions de la migration verticale deTetranychus urticae dans de fortes infestations, a permis de mettre en éviduence un rythme circadien caractérisé par un mouvement alterné de montée et de descente, la population migrant vers le haut des plantes en début d'après-midi. Ce rythme est en partie endogène puisqu'il se maintient plusieurs jours dans des conditions constantes.
Summary
The vertical movements of high populations of the miteTetranychus urticae, provided evidence of a circadian rhythm. This rhythm was characterised by an alternate movement of the mites up and down plant stems. The mite populations started to move up stems in the early afternoon. Control of this movement was partly endogeneous, since mites continued to move up plant stems for several days after being moved from fluctuating to constant conditions.
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Pralavorio, M., Fournier, D. & Millot, P. Activité migratoire des tétranyques: Mise en évidence d'un rythme. Entomophaga 34, 129–134 (1989). https://doi.org/10.1007/BF02372596
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DOI: https://doi.org/10.1007/BF02372596