title: Resistance monitoring and cross-resistance patterns of three rice planthoppers, Nilaparvata lugens, Sogatella furcifera and Laodelphax striatellus to dinotefuran in China.
abstract: Three rice planthoppers, brown planthopper, Nilaparvata lugens, white-backed planthopper, Sogatella furcifera and small brown planthopper, Laodelphax striatellus, are important pests of cultivated rice in tropical and temperate Asia. They have caused severe economic loss and developed resistance to insecticides from most chemical classes. Dinotefuran is the third neonicotinoid which possesses a broad spectrum and systemic insecticidal activity. We determined the susceptibility of dinotefuran to field populations from major rice production areas in China from 2013 to 2015. All the populations of S. furcifera and L. striatellus were kept susceptible to dinotefuran (0.7 to 1.4-fold of S. furcifera and 1.1-to 3.4-fold of L. striatellus) However, most strains of N. lugens (except FQ15) collected in 2015 had developed moderate resistance to dinotefuran, with resistance ratios (RR) ranging from 23.1 to 100.0 folds. Cross-resistance studies showed that chlorpyrifos-resistant and buprofezin-resistant Sogatella furcifera, chlorpyrifos-resistant and fipronil-resistant L. striatellus, imidacloprid-resistant and buprofezin-resistant Nilaparvata lugens exhibited negligible or no cross-resistance to dinotefuran. Synergism tests showed that piperonyl butoxide (PBO) produced a high synergism of dinotefuran effects in the DY15 and JS15 populations (2.14 and 2.52-fold, respectively). The obvious increase in resistance to dinotefuran in N. lugens indicates that insecticide resistance management strategies are urgently needed to prevent or delay further increase of insecticide resistance in N. lugens.
authors.affiliation: College of Plant Protection, Nanjing Agricultural University/State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China.
authors.forename: Xi-Chao
authors.initials: XC
authors.lastname: Mu
authors.affiliation: College of Plant Protection, Nanjing Agricultural University/State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.affiliation: College of Plant Protection, Nanjing Agricultural University/State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China.
authors.forename: Li-Xiang
authors.initials: LX
authors.lastname: Wang
authors.affiliation: National Agro-Tech Extension and Service Center, Beijing 100026, China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Zhang
authors.affiliation: College of Plant Protection, Nanjing Agricultural University/State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Zhang
authors.affiliation: College of Plant Protection, Nanjing Agricultural University/State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China. Electronic address: gaocongfen@njau.edu.cn.
authors.forename: Cong-Fen
authors.initials: CF
authors.lastname: Gao
authors.affiliation: College of Plant Protection, Nanjing Agricultural University/State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China.
authors.forename: Shun-Fan
authors.initials: SF
authors.lastname: Wu
mesh_terms: D000818:Animals; D002681:China; D006146:Guanidines / Q000633:toxicity*; D006430:Hemiptera / Q000187:drug effects*; D007093:Imidazoles / Q000633:toxicity; D007305:Insecticide Resistance; D007306:Insecticides / Q000633:toxicity*; D000073943:Neonicotinoids; D009574:Nitro Compounds / Q000633:toxicity*; D012275:Oryza; D010574:Pesticide Synergists / Q000633:toxicity; D010882:Piperonyl Butoxide / Q000633:toxicity; D011720:Pyrazoles / Q000633:toxicity; D013829:Thiadiazines / Q000633:toxicity
chemical_list: D006146:Guanidines; D007093:Imidazoles; D007306:Insecticides; D000073943:Neonicotinoids; D009574:Nitro Compounds; D010574:Pesticide Synergists; D011720:Pyrazoles; D013829:Thiadiazines; C465368:dinotefuran; C083997:buprofezin; C082359:imidacloprid; D010882:Piperonyl Butoxide; C082360:fipronil
keywords: Cross-resistance; Dinotefuran; P450; Resistance monitoring; Rice planthoppers