热浪式连续高温胁迫对小菜蛾幼虫和蛹的影响

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1、热浪式连续高温胁迫对小菜蛾幼虫和蛹的影响摘要：模拟高温热浪的温度模式，研究了热浪式连续高温胁迫对小菜蛾(Plutellaxylostella)幼虫和蛹的影响。结果表明，高温胁迫时的初始虫态、胁迫温度、胁迫模式及各因子之间的交互作用都可能对小菜蛾3龄幼虫和蛹的羽化率及生殖力有显箸影响。小菜蛾3龄幼虫比蛹耐热，蛹更易受到高温危害。虽然小菜蛾较耐高温，但40°C,持续3d每天8h(3dX8h/d)的高温胁迫下，相比30°C1d8h(1dX8h/d),小菜蛾羽化率降低了55.48%o从生殖角度看，蛹经高温胁迫

2、后生殖力显著低于3龄幼虫，3d持续高温胁迫与1d高温相比，生殖力降低了48.84%,40°C胁迫相比30°C,生殖力降低了64.32%。持续长时间的高温热浪天气可能会导致小菜蛾种群数量的大幅度减少。本文采集自网络，本站发布的论文均是优质论文，供学习和研究使用，文中立场与本网站无关，版权和著作权归原作者所有，如有不愿意被转载的情况，请通知我们删除已转载的信息，如果需要分享，请保留本段说明。关键词：高温热浪；高温胁迫；羽化率；生殖力；小菜蛾(Plutellaxylostella)中图分类号:Q968.1；

3、S433.4文献标识码:A文章编号：0439-8114(2016)22-5835-04D0I：10.14088/j.cnki.issn0439-8114.2016.22.027TheEffectsofContinuousHighTemperatureStressontheLarvaeandPupaeofPlutellaxylostellaCHANGXiang-qian,L??BLiang,ZHANGShu(InstituteofPlantProtectionandSoilScience,HubeiAc

4、ademyofAgriculturalSciences/IIubeiKeyLaboratoryforCropDiseases,InsectPestsandWeedsControl,Wuhan430064,China)Abstract：Theeffectsofcontinuoushightemperatureonthe3rdlarvaeandpupaeofdiamondbackmoth(DBM)(Plutellaxylostella)emergeneerateandfecunditywereconduc

5、tedbysimulatingheatwaves・Theresultsshowedthattheinitialdevelopmentstageofheatstress,stresstemperature,heatstresspatternsandtheinteractionbetweenthesefactorsallsignificantlymayaffecttheemergencerateandfecundityof3rdlarvaeandpupae・Thelarvaeweremoretoleran

6、ttotheheatstressthanthepupae・Thepupaeweremoresusceptibletohightemperaturestress・Theemergenceratewasdecreasedby55.48%underthestressofsuccessive3d8h/dof40°Ccomparedto1d8h/d.Thefecundityofpupaewassignificantlylowerthanlarvaeunderhightemperaturestress；Thefe

7、cundityof3dstresswasdecreasedby48.84%comparedto1dstressandthefecundityof40°Cstresswasdecreasedby64.32%comparedto30°Crespective!y.TheheatwavesmayleadthecollapseoftheDBMpopulationinthefields・Keywords：heatwaves；hightemperaturestress；emergencerate；fecundity

8、；diamondbackmoth(Plutcllaxylostclla)近年来，随着全球平均气温的升高，极端天气现象，如高温热浪、暴雨、骤热骤冷等现象明显增加［1］。根据联合国政府间气候变化专门委员会的报告，全球范围内夏季高温热浪天气将持续频繁出现［2］。高温热浪天气意味着连续多天出现超过35°C的高温。昆虫是变温动物,更容易受到这种天气变化的影响［3］o目前关于夏季高温对昆虫的影响已有报道，如夏季高温抑制了温室白粉虱(Trialeurodesvapor