To lay a foundation for nationwide resistance management of the brown planthopper Nilaparvata lugens（Stl）, we collected 19 samples of the planthopper from 13 locations covering eight provinces to monitor the resistance to five conventional insecticides in 2010 and 2011.The results showed that the resistance of the brown planthopper to buprofezin increased obviously given all populations were at middle resistance level (11.3 to 23.4 fold) in 2010 and 80% populations were at high resistance level (40.7 to 119.7 fold) in 2011. All the monitored populations still remained to be high to extremely high resistant to imidacloprid (82.3 to 1935.8 fold), the resistance increased obviously again comparing with the period from 2006 to 2009. To thiamethoxam, the resistance ratios were between 6.1 to 14.4 fold and 12.8 to 62.3 fold in 2010 and 2011, respectively; and the resistance increased significantly in most areas in the two years. All the 18 populations remained to be susceptible to low resistant to chlopyrifos. The resistance risk to pymetrozine may be a little high since the monitored samples were susceptible or developed low level resistance (1.9 to 51 fold) in 2010, while the resistance increased to moderate level (15.7 to 25.4 fold) in the next year. It indicated that the resistance to pymetrozine might increased quickly with the wide use of this insecticide in the main rice planting areas. The scientific rotation and mixing among the insecticides without cross resistance must be adopt.
WANG Peng1, NING Zuoping1, ZHANG Shuai2 , JIANG Tiantian1, TAN Lirong1 , DONG Song1, GAO Congfen1,*
. Resistance Monitoring to Conventional Insecticides in Brown Planthopper, Nilaparvata lugens (Hemiptera: Delphacidae) in Main Rice Growing Regions in China[J]. Chinese Journal OF Rice Science, 2013
, 27(2)
: 191
-197
.
DOI: 10.3969/j.issn.10017216.2013.02.012
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