番茄刺皮瘿螨的危害与其主要生态学特征分析

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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