抗蟲棉棉田主要昆蟲群落結(jié)構(gòu)及種群動態(tài)研究.pdf

1、分類號：V‘8U6‘36級別：華中農(nóng)業(yè)大學(xué)研究生學(xué)位論文論文題目：抗蟲棉棉田主要昆蟲群落結(jié)構(gòu)及種群動態(tài)研究研究生楊國正副教授符家平導(dǎo)師姓名；姓名：宋述濤高級農(nóng)藝師專業(yè)：農(nóng)業(yè)推廣研究方向：種植領(lǐng)域申請學(xué)位：碩士磐竇譽煮2004年11月提交日期：一。中國武漢AbstractSincethe1980s，Cottonbollworms(Heliothisarmigrea)havedoneharmtocottonmoreseriouslyandb

2、eenahugethreattothestableandsustainabledevelopmentofcottonplantingNowmanycountriesintheworldhavedevelopedmanytrangenicbollwormresistantcottonvarietiesSincethe1990schinahasalsodevelopedourOwnbollWoITrlresistanthybridcotto

3、nvarietiesButwhatistheinfluenceofthevarietiesonthemainotherinsectsWhatinfluenceisgiventocottonbollwormSoitissignificanttomakesureTheexperimentisdonetofindouttheinfluencetOensurethesustainabledevelopmentofcottonplantingan

4、dthecomprehensivemanagementofpestTheexperimentisinvoledinthreetypesofvarieties：hybridbollwormresistantvariety(HBR)，conventionalbollwormresistantvariety(CBR)，conventionalbollWOrmnonresistantvariety(CNR)FromJunethefifthtoS

5、eptemberthe30th，investigationismadeeveryfivedays，fromfivesitesonthediagonalsofcottonfield，tofindOUttheindexofdominance，indexofevennessandindexofdiversityt0maketheinfluenceclearofHBRonthestabilityofinsectcommunityTheresul

6、tshow：HBRfunctionshigheryieldingbetterresistancetobollWOrm，andsmallerpestpopulationThreetypeshavethesameinfluenceonnaturalenemiesofpestsAmonythemaininsects，cottonbollwormisnotthedorminantspeciesanddolessharmtocottonThein