《植物病虫害绿色防控技术》课件-2 李红点病（双语）

李红点病绿色防控

Green

PreventionandControlofPlumRedSpot李疔病PlumRedLeafSpot黄色圆圈中间小红点Yellowcircularspots

Smallreddotinthemiddle症状类似梨锈病Symptomsaresimilartopearrust李红点病绿色防控GreenPreventionandControlofPlumRedSpot主要寄主：李、稠李Mainhosts:PlumsandPrunuspadua发病部位：叶片，或果实Diseasedpart:leaves,orfruits危害及分布：全国，普遍且较重Hazardsanddistribution:nationwide,widespreadandserious李红点病绿色防控GreenPreventionandControlofPlumRedSpot一、病状Pathology初期：小圆斑，橙黄色、稍隆起，边界清晰；InitialstageSmallroundspots,orange-yellow,slightlyraised,withclearboundaries;中后期:病斑变大，圆或椭圆形，中间红黑、边缘橙红；增厚，叶面稍微凹陷、向叶背凸起；MiddleandlatestagesSpotsbecomelarge,roundoroval,withreddish-blackinthemiddleandorange-redmargins.Thickened,slightlysunkenontheleafsurfaceandbulgingtothebackoftheleaf;后期:病斑坏死，变褐色Latestage:Thespotsarenecroticandturnbrown.叶片Leaves李红点病绿色防控GreenPreventionandControlofPlumRedSpot一、病状Pathology果实——圆形斑，橙红色→红黑色，散生深色小红点Fruit-Roundspots,orangered→reddishblack,scattereddarkredspots李红点病绿色防控GreenPreventionandControlofPlumRedSpot二、病症及病原SymptomsandPathogens7-8月暗红色小点粒July-August:Darkreddots分生孢子（器）Conidia(pycnidium)10-11月黑色小点粒October-November:Blackdots子囊孢子（壳）Ascospores(shell)病原

子囊菌亚门、疔座霉属、李疔菌PathogensAscomycotion,Polystima,Polystigmarubrum——叶面、果面--Leafsurface,fruit——叶背、果面--Leafback,fruitsurface病症Symptoms李红点病绿色防控GreenPreventionandControlofPlumRedSpot区别Differentiation李红点病Plumredspot梨锈病Pearrust寄主Host叶背症状Symptomsofleaveback发病时间Onsettime李亚科，如稠李LiYake,Prunuspadua苹果亚科，如梨、苹果Maloideae,suchaspearsandapples3-9月，病程长March~September:longcourseofdisease3-5月，病程较短March~September:longcourseofdisease小黑点Smallblackspot须状物Whiskers叶面症状Foliarsymptoms小红点Smallreddots小黑点Smallblackspot李红点病绿色防控GreenPreventionandControlofPlumRedSpot三、发生规律春季Spring一年只有一次侵染一、越冬Overwintering场所：病叶、落果Location:diseasedleavesandfallenfruits形态：子囊壳Form:Perithecium三、侵染叶片、果实Leaves,fruits

二、传播Communication子囊孢子借气流传播Ascosporesaretransmittedbyairflow7-8月July~August分生孢子（器）Conidia(pycnidium)子囊壳（孢子）10-11月李红点病

侵染循环plumredspot-Infectioncycle李红点病绿色防控GreenPreventionandControlofPlumRedSpot四、发病条件

Conditions气候条件春季,李萌芽展叶期至9月中旬均能发病

多雨温暖季节,发病重;高峰期7月Climaticconditions:

Inspring,thediseasecanoccurfromtheleafbuddingdevelopmentstagetomid-SeptemberRainyandwarmseason,severediseases;peakperiodJuly果园生态通风透光性差、积水严重Ecologicalconditionsoforchard:poorventilationandlighttransmittance,andseriouswateraccumulation李红点病绿色防控GreenPreventionandControlofPlumRedSpot1、降低越冬菌源基数

清扫果园病叶、病果，

带出销毁Reducethebaseofoverwinteringpathogensources,cleanthediseasedleavesorfruitsintheorchard,Takeoutfordestruction五、防控要点KeyPointsofPreventionandControl2、萌芽之前喷药Sprayingbeforegermination李红点病绿色防控GreenPreventionandControlofPlumRedSpot课后小结:After-classsummary:症状Symptoms病原Pathogen发病规律Pathogenesis发病条件Epidemicfactor重点：叶面、果实病斑，黄→橙红色，产生深色小红点Focuses:spotsonleavesandfruits,yellow→orangered,withsmalldarkredspots真菌，能产生分生孢子、子囊孢子Fungi,capableofproducingconidia,ascospores病程3-9月；3月子囊孢子初侵染，7、8月分生孢子，10-11月子囊壳，在病叶、果上越冬。仅一次侵染ThecourseofthediseaseisfromMarchtoSeptember;ascosporesareinitiallyinfectedinMarch,andconidiacomeoutinJulyandAugust.FromOctobertoNovember,theperitheciumoverwintersondiseasedleavesandfruits.Onlyoneinfection

多雨气候，发病重；高峰期7月Rainyclimate,severeonset;peakinJuly防控要点KeyPointsofPreventionandControl清除果园病叶、病果，减少越冬菌源量Removediseasedleavesandfruitsfromtheorchardtoreducetheamountofoverwinteringbacteria李红点病绿色防控GreenPreventionandControlofPlumRedSpot课后作业：Homework:一、结合当地李园生产实际拟定一套李红点病的综合防治方案Combine