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Stem borer [Chilo suppressalis (Walker)] is one of the important pests harmful to rice, perennial occurred in the Yangtze River basin heavier. Since the 1990s, the stem borer harm again tended to be worse in parts of outbreaks difficult to hazard prevention and control, posing a serious threat to the high and stable yield of rice. (MCS) of the study on the 2006-2007 annual inspection measured Zhejiang, Jiangsu and Anhui stem borer populations on several major insecticide resistance, to clarify its development status; Zhejiang, Jiangsu and measured in 2007 Province, five regional populations of of 6 dozen insecticides sensitivity, in order to provide theoretical guidance for scientific medicine; through the indoor resistance screening were stem borer resistance to fipronil and furans insects hydrazide risk assessment. Zhejiang, Jiangsu and Anhui provinces at the Chilo suppressalis resistance testing (monitoring) measured using fourth instar larvae drip method in 2006-2007, the results show that: (1) fipronil first began in 1997 in Zhejiang southeast Wen Taiwan regions in large scale for control of rice stem borer and other pests of rice, usage was an increasing trend year by year, is one of the important pharmaceutical control stem borer. The monitoring found the of Zhejiang Ruian and Cangnan stem borer fipronil produce middle level resistance and other parts of the stem borer still is sensitive to reduced sensitivity. (2) detected the of Zhejiang Cangnan stem borer avermectin produce low levels of resistance (RR = 7.6 times), which is the laboratory for the first time detected Chilo suppressalis avermectins resistance, other the the region stem borer avermectin still at a sensitive level. (3) Ruian, Zhejiang of Cangnan and Jiangsu Gaochun stem borer generate a high level of resistance to triazophos, Donghai, Jiangsu Province, Lianyungang and Huangshan Mountain in Anhui stem borer is still in triazophos sensitive to reduced sensitivity to phase. (4) Monosultap due to a long history of medication, monitoring of all populations have different levels of resistance, the resistance level around medication history, Zhejiang Southeast, Ryan and the Cangnan two populations have extremely high levels of resistance, South Jiangsu Gaochun populations also have produced a very high level of resistance, Jiangsu Subei due to the use of relatively late, the monitors only a moderate level of resistance. (5) two-year monitoring results show that, Zhejiang Cangnan populations of chlorpyrifos has generated a high level of resistance (RR 61.9 and 91.7 times, respectively), Zhejiang Ryan populations of its middle-level resistance (RR 39.3 and 40.5-fold), Jiangsu Gaochun population in 2006 to its low level of resistance (RR = 8.8 times), the 2007 development of a mid-level resistance (RR = 22.6 times), Lianyungang and the East China Sea population of its resistance ( 2.4 to 5.4-fold). (6) Ryan, Cangnan populations cyhalothrin, fenvalerate, cypermethrin, cyfluthrin and deltamethrin to a high level of resistance, the other three populations In addition to fenvalerate 4 kinds of pyrethroid insecticides to produce a low to medium level of resistance (5.3 to 31.2 times). Gaochun and Lianyungang populations fenvalerate still at a sensitive level (RR = 2.6 times), and the East China Sea populations showed reduced sensitivity (RR = 3.3 times). To four larvae drip method for the determination of the six categories dozen insecticides the Chilo suppressalis virulence of the five regions of Zhejiang and Jiangsu provinces, of the understanding of the local pharmaceutical usage and stem borer resistance level based on areas for different resistance levels, resistance management programs, to guide Field medication. In Ruian, Zhejiang Chilo suppressalis (RA05) as a starting population fed for 21 generations, indoor accumulated during 10 generations Filter fipronil, compared with the susceptible strain, screening strains resistance to fipronil 32.39 times, anti- sexual rise of 0.60 times the estimate based on screening results realized heritability (h ~ 2) of 0.2069. Starting population, Lianyungang, Jiangsu (LYG05) furan tebufenozide after 8 generations continuous screening, compared with the susceptible strain, screening of resistant strains of the furan insects hydrazide multiple of 2.00 times, the resistance increased by multiples -0.22 times, eventually realized heritability estimate of -0.0847 preliminary indication of slower development of resistance, the Chilo suppressalis of furan tebufenozide low resistance risk.
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