Abstract:Resume-L'etude de la dynamique des populations sur cotonnier de Aphis gossypii Glover menee a Tedla au cours de trois annees consecutives a permis de montrer l'existence de deux periodes de pullulations sur cotonnier, en juin-juillet et en septembre. La demiere pullulation, numeriquement tres importante, cause indirectement des degats economiques considerables dans le perimetre irrigue du Tadla. La pullulation de A. gossypii sur cotonnier depend principalement de la date et de l'importance des vols de contamin… Show more
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