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1、23(增刊)37-41中国生物防治ChineseJournalofBiologicalControl2007年9月昆明地区紫茎泽兰叶斑病的发生规律111,23陶永红,李正跃,何月秋(11云南农业大学农业生物多样性与病虫害技术控制教育部重点实验室,昆明650201;21云南农业大学农学与生物技术学院)摘要:云南省昆明地区由紫茎泽兰菌绒孢菌引起的紫茎泽兰叶斑病发生普遍,具有生防作用。定点调查的结果表明,叶斑病发病盛期在7-9月,发病高峰期在9月中旬,12月中旬至翌年的2月中旬为发病停滞期。病菌自新生叶侵入,自倒数第三层叶始显症状,下部叶片的病情较上部叶片严重,病菌潜育期为33～39
2、d,植株的病叶率达40%～70%。生长瘦弱、光照少、湿度大的林荫下的植株病情较生长健壮、光照充足、土壤肥沃的植株病情严重。关键词:紫茎泽兰;紫茎泽兰菌绒孢菌;叶斑病;发生规律;生物防治中图分类号:S451;S476文献标识码:A文章编号:100529261(2007)增刊20037205OccurrenceofLeafSpotofEupatoriumadenophoruminKunmingArea111,2TAOYong2hong,LIZheng2yue,HEYue2qiu(11KeyLaboratoryofAgriculturalBiodiversityandPestsCon
3、trol,MinistryofEducation;21FacultyofAgronomicsandBiotechnology,YunnanAgriculturalUniversity,Kunming650201,China)Abstract:Eupatoriumadenophorumisadestructive,andenvironmentharmfulweed.Whenittakesovermuchspaceandbecomesadominantpopulation,itbecomesaseriousecologicalandeconomicalproblem.Leafspo
4、t,causedbyMycovellosiellaeupatorii2odorati(Yen)Yen,isacommondiseaseontheweedaroundKunmingarea,YunnanProvince,China,whichmaybeabiocontrolfactorfortheweed.Thesys2temicinvestigationonfixedplantsinthecampusofYunnanAgriculturalUniversitylocatedinKunmingCityindicatedthatthediseaseoccursseverelyfro
5、mJulytoSeptember,withleafincidenceof40%-70%,arrivesatpeakinthemiddleofSeptemberandstopsfromthemiddleDecembertonextmiddleFebruaryduetoitsgrowthperiodandweather,especiallyhumidity.Thepathogeninfectedyoungleaf,butlesionsappearonolderleavespreferably,i.e.,ontheleavesbelowthethirdleaffromtheplant
6、top.Itslatentperiodwas33-39dinthenature.Weakplantsgrowingundertreeandhighhumiditycondi2tionssufferedfromthediseasemoreseverelythanrobustplantsgrowinginstronglightandfertilesoil.Keywords:Eupatoriumadenophorum;Mycovellosiellaeupatorii2odorati;leafspot;occurrence;biocon2trol收稿日期:2007203223基金项目:
7、云南省科技攻关项目(2006SG23)作者简介:陶永红(1982-),男,硕士研究生;3通讯作者;E2mial:heyueqiu@tom.com。37©1994-2016ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.http://www.cnki.net中国生物防治第23卷紫茎泽兰(EupatoriumadenophorumSpreng)是一种有毒的、侵占性很强的恶性杂草,是菊科泽兰属的多年生草本植物,俗称“植
