title: Insecticide resistance monitoring and metabolic mechanism study of the green peach aphid, Myzus persicae (Sulzer) (Hemiptera: Aphididae), in Chongqing, China.
abstract: Myzus persicae (Sulzer) is one of the most important agricultural pests in China, which caused serious losses every year. For resistance monitoring, twelve populations of this pest were collected from tobacco field in Chongqing, China, and their sensitivities to 4 insecticides were tested. Results showed that only WL (RR=6.51) and FJ (RR=6.03) populations have developed minor resistance to imidacloprid, and the others still remained susceptible. One population (NC) has reached a high resistance level to cyhalothrin (RR=41.28), five populations showed medium level (10.36≤RR≤20.45), and the other six remained susceptible (0.39≤RR≤3.53). As regards carbosulfan, three populations have developed medium resistance, four populations showed only minor resistance, and the other five (0.81≤RR≤3.97) were still susceptible. Population SZ developed a medium level (RR=14.83) to phoxim, the other 11 were susceptible (0.29≤RR≤2.41). To analysis the potential resistance mechanism, inhibition effects of synergists and detoxifying enzyme activities were detected. The results indicated that the MFO was the most important detoxifying enzyme conferring imidacloprid resistance, and CarE was most important to cyhalothrin, carbosulfan and phoxim. Our study provided a comprehensive survey of insecticide resistance of M. persicae in Chongqing, and suggested that different counties should take corresponding management to delay the insecticide resistance development and prolong the usefulness of insecticides.
authors: Key Laboratory of Entomology and Pest Control Engineering of Chongqing, Southwest University, Chongqing 400716, China; Chongqing Institute of Tobacco Science, Chong qing 400700, China.
authors: Yong
authors: Y
authors: Li
authors: Key Laboratory of Entomology and Pest Control Engineering of Chongqing, Southwest University, Chongqing 400716, China.
authors: Zhifeng
authors: Z
authors: Xu
authors: Key Laboratory of Entomology and Pest Control Engineering of Chongqing, Southwest University, Chongqing 400716, China.
authors: Li
authors: L
authors: Shi
authors: Key Laboratory of Entomology and Pest Control Engineering of Chongqing, Southwest University, Chongqing 400716, China.
authors: Guangmao
authors: G
authors: Shen
authors: Key Laboratory of Entomology and Pest Control Engineering of Chongqing, Southwest University, Chongqing 400716, China. Electronic address: helinok@vip.tom.com.
authors: Lin
authors: L
authors: He
mesh_terms: D000818:Animals; D001042:Aphids / Q000187:drug effects* / Q000201:enzymology / Q000378:metabolism; D001681:Biological Assay; D002219:Carbamates; D002681:China; D007093:Imidazoles; D007305:Insecticide Resistance; D007306:Insecticides / Q000378:metabolism / Q000494:pharmacology; D000073943:Neonicotinoids; D009570:Nitriles; D009574:Nitro Compounds; D009946:Organothiophosphorus Compounds; D011722:Pyrethrins
chemical_list: D002219:Carbamates; D007093:Imidazoles; D007306:Insecticides; D000073943:Neonicotinoids; D009570:Nitriles; D009574:Nitro Compounds; D009946:Organothiophosphorus Compounds; D011722:Pyrethrins; C082359:imidacloprid; C003135:phoxim; C037304:cyhalothrin; C035038:carbosulfan
keywords: Bioassay; Detoxification enzymes; Insecticide resistance; Myzus persicae; Synergist