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1、中国水稻科学(ChinJRiceSci),2013,27(2):177-183http://www.ricesci.cnDOI:10.3969/j.issn.1001-7216.2013.02.010177粤北稻区稻纵卷叶螟的发生规律及虫源性质分析齐国君1王政2蓝日青3吕利华1,*(1广东省农业科学院植物保护研究所/广东省植物保护新技术重点实验室,广东广州510640;2华南农业大学资源环境学院,广东广州510642;3韶关市农业科学研究所,广东韶关512005;*通讯联系人,E-mail:lhlu@gdppri.com)OccurrenceandPopulationCharacteristi
2、csAnalysisofCnaphalocrocismedina-lis(Guenée)inRiceGrowingRegioninNorthernGuangdongProvinceQIGuo-jun1,WANGZheng2,LANRi-qing3,LVLi-hua1,*(1GuangdongProvincialKeyLaboratoryofHighTechnologyforPlantProtection/PlantProtectionResearchInstitute,GuangdongAcademyofAgriculturalSciences,Guangzhou510640,China;2C
3、ollegeofNaturalResourcesandEnvironment,SouthChinaAgriculturalUniversity,Guangzhou510642,China;3AgriculturalScienceInstituteofShaoguan,Shaoguan512005,China;*Correspondingauthor,E-mail:lhlu@gdppri.com)QIGuojun,WANGZheng,LANRiqing,etal.OccurrenceandpopulationcharacteristicsanalysisofCnaphalocrocismedin
4、alis(Guenée)inricegrowingregioninnorthernGuangdongProvince.ChinJRiceSci,2013,27(2):177-183.Abstract:ThedynamicsandpopulationcharacteristicsofC.medinalisforeachgenerationinthericegrowingregionofnorthernGuangdongProvincewerestudiedthroughsystematicinvestigationandfemaleovariandissectionduring2010and20
5、11,andtheannualpopulationdynamicswereanalyzedincombinationwithdatafromdailyfieldsurveysconductedbetween1961-1976andtherecentyearsafter2000.Theresultswereasfollows:1)withsixgenerationsperyearinShaoguanCity,C.medinalishadtwomaindensitypeakswhichoccurredinearlyandmiddleJuneonearly-seasondouble-cropping
6、paddyfield,andinlateAugustandearlySeptemberonlate-seasondouble-croppingpaddyfield;2)thepopulationcharacteristicsofC.medinalisforeachgenerationweredetermined;3)thedateofmothdensitypeakbetween1961-1976and2000-2011hadnosignificantdifference,butsince2000,meandailyamountofC.medinaliswassignificantlyhighe
7、rthanthatinpeakdaysofearlyricefrom1961to1976inQujiangDistrict,GuangdongProvince;4)theoccurrencefrequencyofthehighestmothdensitypeakinearly-seasondouble-croppingpaddyfieldwashigherthanthatinlate-season
