| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 2008915 | Pesticide Biochemistry and Physiology | 2016 | 8 Pages |
•The resistance of twenty-one populations of N. lugens to eleven insecticides was monitored in 2012–2014.•High resistance to imidacloprid (resistance ratio (RR) = 2029) and to buprofezin (RR = 1222) was observed.•Significant correlations were analyzed between the values of the logLC50 of the insecticides.•Significant correlations were detected between cytochrome P450 monooxygenase and the susceptibility of Nilaparvata lugens to ethiprole, imidacloprid, and dinotefuran.•A significant correlation was found between the activity of esterase and the susceptibility of Nilaparvata lugens to imidacloprid.
The brown planthopper is a serious rice pest in China. Chemical insecticides have been considered a satisfactory means of controlling the brown planthopper. In the present study, we determined the susceptibility of twenty-one populations of Nilaparvata lugens to eleven insecticides by a rice-stem dipping method from 2012 to 2014 in eight provinces of China. These field-collected populations of N. lugens had developed high levels of resistance to imidacloprid (resistant ratio, RR = 233.3–2029-fold) and buprofezin (RR = 147.0–1222). Furthermore, N. lugens showed moderate to high levels of resistance to thiamethoxam (RR = 25.9–159.2) and low to moderate levels of resistance to dinotefuran (RR = 6.4–29.1), clothianidin (RR = 6.1–33.6), ethiprole (RR = 11.5–71.8), isoprocarb (RR = 17.1–70.2), and chlorpyrifos (RR = 7.4–30.7). In contrast, the susceptibility of N. lugens to etofenprox (RR = 1.1–4.9), thiacloprid (RR = 2.9–8.2) and acetamiprid (RR = 2.7–26.2) remained susceptible to moderate levels of resistance. Significant correlations were detected between the LC50 values of imidacloprid and thiamethoxam, dinotefuran, buprofezin, and etofenprox, as well as between clothianidin and thiamethoxam, dinotefuran, ethiprole, acetamiprid, and thiacloprid. Similarly, significant correlations were observed between chlorpyrifos and etofenprox, acetamiprid and thiacloprid. Additionally, the activity of the detoxification enzymes of N. lugens showed a significant correlation with the log LC50 values of imidacloprid, dinotefuran and ethiprole. These results will be beneficial for effective insecticide resistance management strategies to prevent or delay the development of insecticide resistance.
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