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ID:39120370
大小:3.22 MB
页数:70页
时间:2019-06-25
《番茄刺皮瘿螨的危害与其主要生态学特征分析》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、中文摘要YZ504_h部螨量显著多于中下部,常规品系YZ413上中部螨量多于下部。3品系叶组织内多酚氧化酶(polyphenoloxidase,PPO),过氧化物酶(peroxidase,POD),抗坏血酸过氧化物酶(ascorbateperoxidase,ASP)的活性受该螨为害后均显著提高,但抗螨品系Yz618反应更灵敏。相关分析表明,PPO是螨害诱导产生的抗螨生化因子,ASP是寄主本身具有的抗螨生化因子,POD与抗螨性的关系不大。关键词:番茄刺皮瘿螨;受害模型;生命表;经济阈值;番茄品系;抗螨性IR番茄刺皮瘿螨的危害及其
2、主要生态学特征研究THEDAMAGEANDECOLOGICALCHARACTEIUSTICSOFTOMATORUSSETMITEACULOPSLYCOPERSICI(TRYON)ABSTRACTThetomatorussetmiteAculopslycopersici(Tryon)wasfirstfoundinAmericain1892andWasdescribedbyAustralianscholarTryonin1917.InChina,itWasfirstreportedinGuangxiin1980.Fromtheno
3、n,itWasfoundinShanghai,Hebeiandotherprovinces.InChinathereWaslittleresearchonhabitsofA.1ycopersici,andonthephysiologicalandbiochemicalresponsesoftomatoinjuredbyA.1ycopersici.TheauthorinvestigatedthedistributionandformationoftheinjuryofA.1ycopersiciontomatoplants,pro
4、posedtheconceptsofinjurygradingstandardsandindividual(ordistrict)severityofdamage(DS),theunitareaofmites娜蝎andcalculationformula.Aftersystematicinvestigationoftheperformanceoftomatorussetmiteinfields,webuiltabeneraffectedmodelandcontrolthresholdofthetomatorussetmiteb
5、yusingstatisticalanalysisandcalculus.Throughresearchingtherelationshipbetweenvarietiesandtomatorussetmite,wealsosetupexperimentalpopulationlifetableondifferentvarieties,selectedthreeresistantvarietiesandexploredtheresistancemechanisms.1.Undermitepestdamage,plantgrow
6、thanddevelopmentindicatorssuchasheight,diameter,leafarea,greenleaves,branches,thehighestfruitbranchaffectedtovaryingdegrees.Ourstudyshowsthat:thereWassignificantdifferenceinplantheightanddiameterbetweenthedifferentharmlevels.Differentdegreesofdamagedemonstrateddiffe
7、rentlossrate,andaperiodoftimewillplayaminorroleincompensatingtheinjuredplants.However,whenthedamagesweretooserious,cropfinallyhadyieldlossbecausethecompensatedyielddidnotsurpassthedamagebymiteitself.Lossofleafareaisthemainreasonleadingtoyielddecrease.Thelossofleafar
8、eaperplantiscomposedoftwocomponents,namely,thelossofsingleareaandreductionofthenumberofgreenleaves.Singlearealostismainlyaffectedbyinhibit
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