Does Resistance to Buprofezin Improve Heat and Cold Tolerance of Laodelphax striatellus (Hemiptera: Delphacidae)?
文献类型: 外文期刊
作者: Li, Yongteng 1 ; Zhang, Yueliang 2 ; Liu, Xiangdong 1 ; Guo, Huifang 1 ;
作者机构: 1.Nanjing Agr Univ, Dept Entomol, Coll Plant Protect, Weigang 1, Nanjing 210095, Jiangsu, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Plant Protect, Nanjing 210014, Jiangsu, Peoples R China
关键词: Laodelphax striatellus;buprofezin resistance;heat tolerance;cold tolerance;carboxylesterase
期刊名称:ENVIRONMENTAL ENTOMOLOGY ( 影响因子:2.377; 五年影响因子:2.298 )
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收录情况: SCI
摘要: There is ample evidence that insecticide resistance causes fitness costs and benefits in pests, while the impact of insecticide resistance on thermotolerance of pests is mostly unclear. The Laodelphax striatellus (Fallen), is an important rice insect pest, which has developed resistance to buprofezin in China. Here, we investigated differences in heat tolerance and cold tolerance among L. striatellus lines with variable buprofezin resistance. The lethal time for 50% of the individuals to die (LT50) at 40 degrees C increased with an increase in buprofezin resistance level, whereas both the survival rate under -22 degrees C and the supercooling point of planth oppers did not differ significantly between resistant and susceptible strains. The metabolic enzyme carboxylesterase was found to have an association with buprofezin resistance. Our research showed that buprofezin resistance was positively related with heat tolerance in L. striatellus, but it had no effect on cold tolerance. Insecticide resistance in L. striatellus may therefore have broader implications for the ecology of L. striatellus, and the management of buprofezin resistance in this pest may be challenging.
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