Abstract: 【Aim】 The brown planthopper, Nilaparvata lugens, occurs in many parts of Asia and has developed a high degree of resistance to several chemical classes of common insecticides. The objective of this study is to assess the current status of insecticide resistance in field populations of N. lugens, so as to supply effective insecticide resistance management strategies to prevent or delay the development of insecticide resistance in N. lugens. 【Methods】 The susceptibility of the field populations of N. lugens from rice fields of Zaoyang City, Xiaogan City, Wuxue City, Wuhan City, and Ezhou City in Hubei Province to 11 insecticides was assayed by rice stem dipping method. 【Results】 The field populations of N. lugens have developed high-level resistance to imidacloprid ［the resistance ratio (RR)=101.8-1 239.4)］ and buprofezin (RR=15.9-1 326.3), medium- to high-level resistance to thiamethoxam (RR=24.9-146.5), medium-level resistance to clothidianidin (RR=9.9-16.5), dinotefuran (RR=13.5-15.9), ethiprole (RR=18.3-60.4), chlorpyrifos (RR=17.4-29.8) and isoprocarb (RR=13.9-46.0), low-level resistance to acetamiprid (RR=5.1-9.9), no resistance (susceptible) or low-level resistance to thiacloprid (RR=3.9-7.1), and no resistance (susceptible) to etofenprox (RR=1.3-4.9). 【Conclusion】 It is suggested that imidacloprid and buprofezin should still be suspended for the control of N. lugens and the application frequencies of pymetrozine must be limited. Etofenprox, however, could be an alternate or rotational insecticide for them.  

Key words: Nilaparvata lugens; insecticides, rice stem dipping method, resistance monitoring, rice production areas