Organophosphate Resistance and its Main Mechanism in Populations of Codling Moth (Lepidoptera: Tortricidae) from Central Chile

• DOI: 10.1093/jee/tou001
• Publication Date: 2015-01-13T22:37:15Z
• Authors: M. Reyes; W. Barros-Parada; C. C. Ramirez; E. Fuentes-Contreras
• Keywords: Codling moth; Pesticide resistance; Esterase; Acetamiprid; Piperonyl butoxide

The codling moth, Cydia pomonella (L.), is the key pest of apple production worldwide. Insecticide resistance has been reported in all producing countries, based on five different mechanisms. Codling moth Chile to azinphos-methyl and tebufenozide post-diapausing larvae. However, there are no studies about susceptibility these populations insecticides from other chemical groups. Therefore, efficacy azinphos-methyl, chlorpyrifos-ethyl, esfenvalerate, methoxyfenozide, tebufenozide, thiacloprid neonate larvae six field was investigated, identified mechanisms this species were evaluated. Neonate susceptible studied, but four resistant chlorpyrifos, one them also another tebufenozide. acetylcholinesterase insensitivity mutation not detected, sodium channel knockdown present a low frequency population. Detoxifying enzymatic activity glutathione S-transferases, esterases, cytochrome P-450 monooxygenases adults differed among populations, chlorpyrifos associated only with decreased esterase as shown by significant negative correlation between mortality activity.