Present status of insecticide resistance in Myzus persicae in northern Italy peach orchards | [Situation actuelle de la résistance aux insecticides de Myzus persicae dans les vergers de pêcher de l'Italie du Nord]
1999
Cervato, M.E. ((Universita Cattolica del Sacro Cuore, Piacenza (Italie). Istituto di Entomologia)) | Cravedi, P.
Several peach-potato aphid populations were collected in northern Italy peach orchards between 1997 and spring 1998. These populations were analysed for their total esterase content and, using a simple bioassay procedure, for their susceptibility to pirimicarb. None of the populations was "susceptible" and moreover the most of them showed a high capacity to hydrolyse 1-naphthyl-acetate has as extremely resistant strain of M. persicae do. These populations were also tested for resistance toward pirimicarb and in 28/ of them all the specimens treated survived to a diagnostic dose of this aphicide
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