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Insecticide resistance of the oriental fruit fly, Bactrocera dorsalis (Hendel) (Diptera: Tephritidae), in mainland China 总被引:1,自引:0,他引:1
BACKGROUND: In order to investigate the extent of resistance of oriental fruit fly, Bactrocera dorsalis (Hendel), which is a widespread pest throughout tropical, subtropical and temperate fruit crops, 25 populations of this insect were collected from 13 sites in mainland China in 2007 and 2008. In addition, resistant strains were established that showed increasing development of resistance. RESULTS: Compared with the susceptible strain, one population of B. dorsalis expressed high resistance (RR = 70.4‐fold), 16 populations expressed medium resistance (11.5‐fold < RR < 25.8‐fold) and eight populations had low resistance or remained susceptible (1.4‐fold < RR < 8.9‐fold) to trichlorphon. As regards β‐cypermethrin, one population showed high resistance (RR = 44.0‐fold), nine populations expressed medium resistance (12.2‐fold < RR < 28.4‐fold), 14 populations expressed low or minor resistance (3.0‐fold < RR < 9.7‐fold) and one population remained susceptible (RR = 1.1‐fold). As regards avermectin, five populations had developed high resistance (44.3‐fold < RR < 104‐fold), seven populations expressed medium resistance (11.4‐fold < RR < 38.6‐fold) and three populations expressed low or minor resistance (3.5‐fold < RR < 5.6‐fold). A continuous resistance selection in the laboratory strain showed that the resistance ratios to trichlorphon, β‐cypermethrin and avermectin were 71.6‐fold, 333‐fold and 70.4‐fold respectively. CONCLUSION: The data provided a comprehensive survey of insecticide resistance in Bactrocera dorsalis in mainland China. All results suggested that early resistance management programmes should be established for restoring the efficacy of pesticide‐based control measures. Copyright © 2010 Society of Chemical Industry 相似文献
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用模糊综合评判法探讨桔小实蝇在中国的适生分布 总被引:24,自引:0,他引:24
笔者以桔小实蝇(Bactroceradorsalis)为研究对象,依据其生物生态学特性,选择了7项生态因子,以中国29个有代表性的站点,10年的气象资料(1986~1996),应用模糊综合评判的数学方法,探讨了该虫在中国的适生分布范围。结果表明,北纬25°以南的地区为桔小实蝇的最适宜分布区,四川盆地和贵州的部分地区是桔小实蝇的适宜分布区,北纬25°以北、长江以南的地区是次适生分布区,其余地区是非适宜分布区。 相似文献
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Neem(Azadirachta indica A. Juss.) seed kernel (NSK) extracts,viz., NSK aqueous suspension (NSKS), ethanolic extract of NSK (EtOH. NSK), hexane extract of NSK (neem oil), ethanolic extract
of the hexane extract (EtOH. oil) and acetone extract of deoiled NSK powder (Acet. DNSKP) at 1.25-20% concentrations, and
pure azadirachtin at 1.25-10 ppm, were evaluated as oviposition deterrents toBactrocera cucurbitae (Coq.) andB. dorsalis Hendel. NSKS at ≥5% under choice test conditions, and at all concentrations (≥1.25%) in no-choice tests significantly deterred
oviposition in both species. Similarly, EtOH. NSK was significantly active at all the concentrations tested for both species
in choice and no-choice tests. However, with neem oil and EtOH. oil sensitivities of the two species differed considerably.
Both extracts deterred oviposition byB. cucurbitae at all the concentrations tested under both choice and no-choice test conditions. On the other hand, withB. dorsalis, neem oil was significantly deterrent only at 20% in both test regimes and at 5% and 20% for EtOH. oil under choice and no-choice
test conditions, respectively. Acet. DNSKP significantly deterred oviposition by both species at all concentrations tested.
Azadirachtin failed to deter oviposition in either species. 相似文献
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Tian‐Xing Jing Di‐Fei Wang Yun‐Peng Ma Li‐Li Zeng Li‐Wei Meng Qiang Zhang Wei Dou Jin‐Jun Wang 《Pest management science》2020,76(9):2932-2943
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Ju-Chun Hsu Hai-Tung FengDavid S. Haymer Ya-Hsuan Chen 《Pesticide biochemistry and physiology》2011,100(1):57-63
Genetic and biochemical factors leading to resistance to various organophosphate (OP) based insecticides were studied in lines selected for OP-resistance in the oriental fruit fly Bactrocera dorsalis. Lines were separately selected for resistance to naled, trichlorfon, fenitrothion, fenthion, formothion, and malathion. Overall, these lines showed increased resistance ratios ranging from 13.7- to 814-fold relative to a susceptible (S) line. Also, in these newly selected lines the same three point mutations in the ace gene, previously identified in resistance studies and designated as I214V, G488S and Q643R, were found. As expected, the enzyme from the resistant lines showed lower overall activity and reduced sensitivity to inhibition by fenitrothion, methyl-paraoxon and paraoxon compared to the wild type acetylcholinesterase (AChE) enzyme. The apparent Vmax values for esterase from the resistant lines were 1.2-3.69 times higher than that of the S line. Although only the naled-, trichlorfon- and fenthion-r lines showed lower esterase affinities (based on apparent Km values) compared with the S line, all of the Vmax/Km ratios were higher in the resistant lines compared to that of the S line. The OP-resistant lines also displayed an overall similar pattern of isozyme expression, except for one additional band found only in the naled-r line and one band that was absent in the trichlorfon-, malathion-, and fenthion-r lines. Our results also show that overall, multiple examples of high OP resistance in selected lines of B. dorsalis exhibiting the same genetic alterations in the ace gene seen previously resulted in different effects on esterase enzyme activity in relation to various OP compounds. 相似文献
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