《植物病蟲害綠色防控技術(shù)》課件-2 李紅點?。p語）

李紅點病綠色防控

Green

PreventionandControlofPlumRedSpot李疔病PlumRedLeafSpot黃色圓圈中間小紅點Yellowcircularspots

Smallreddotinthemiddle癥狀類似梨銹病Symptomsaresimilartopearrust李紅點病綠色防控GreenPreventionandControlofPlumRedSpot主要寄主：李、稠李Mainhosts:PlumsandPrunuspadua發(fā)病部位：葉片，或果實Diseasedpart:leaves,orfruits危害及分布：全國，普遍且較重Hazardsanddistribution:nationwide,widespreadandserious李紅點病綠色防控GreenPreventionandControlofPlumRedSpot一、病狀Pathology初期：小圓斑，橙黃色、稍隆起，邊界清晰；InitialstageSmallroundspots,orange-yellow,slightlyraised,withclearboundaries;中后期:病斑變大，圓或橢圓形，中間紅黑、邊緣橙紅；增厚，葉面稍微凹陷、向葉背凸起；MiddleandlatestagesSpotsbecomelarge,roundoroval,withreddish-blackinthemiddleandorange-redmargins.Thickened,slightlysunkenontheleafsurfaceandbulgingtothebackoftheleaf;后期:病斑壞死，變褐色Latestage:Thespotsarenecroticandturnbrown.葉片Leaves李紅點病綠色防控GreenPreventionandControlofPlumRedSpot一、病狀Pathology果實——圓形斑，橙紅色→紅黑色，散生深色小紅點Fruit-Roundspots,orangered→reddishblack,scattereddarkredspots李紅點病綠色防控GreenPreventionandControlofPlumRedSpot二、病癥及病原SymptomsandPathogens7-8月暗紅色小點粒July-August:Darkreddots分生孢子（器）Conidia(pycnidium)10-11月黑色小點粒October-November:Blackdots子囊孢子（殼）Ascospores(shell)病原

子囊菌亞門、疔座霉屬、李疔菌PathogensAscomycotion,Polystima,Polystigmarubrum——葉面、果面--Leafsurface,fruit——葉背、果面--Leafback,fruitsurface病癥Symptoms李紅點病綠色防控GreenPreventionandControlofPlumRedSpot區(qū)別Differentiation李紅點病Plumredspot梨銹病Pearrust寄主Host葉背癥狀Symptomsofleaveback發(fā)病時間Onsettime李亞科，如稠李LiYake,Prunuspadua蘋果亞科，如梨、蘋果Maloideae,suchaspearsandapples3-9月，病程長March~September:longcourseofdisease3-5月，病程較短March~September:longcourseofdisease小黑點Smallblackspot須狀物Whiskers葉面癥狀Foliarsymptoms小紅點Smallreddots小黑點Smallblackspot李紅點病綠色防控GreenPreventionandControlofPlumRedSpot三、發(fā)生規(guī)律春季Spring一年只有一次侵染一、越冬Overwintering場所：病葉、落果Location:diseasedleavesandfallenfruits形態(tài)：子囊殼Form:Perithecium三、侵染葉片、果實Leaves,fruits

二、傳播Communication子囊孢子借氣流傳播Ascosporesaretransmittedbyairflow7-8月July~August分生孢子（器）Conidia(pycnidium)子囊殼（孢子）10-11月李紅點病

侵染循環(huán)plumredspot-Infectioncycle李紅點病綠色防控GreenPreventionandControlofPlumRedSpot四、發(fā)病條件

Conditions氣候條件春季,李萌芽展葉期至9月中旬均能發(fā)病

多雨溫暖季節(jié),發(fā)病重;高峰期7月Climaticconditions:

Inspring,thediseasecanoccurfromtheleafbuddingdevelopmentstagetomid-SeptemberRainyandwarmseason,severediseases;peakperiodJuly果園生態(tài)通風(fēng)透光性差、積水嚴(yán)重Ecologicalconditionsoforchard:poorventilationandlighttransmittance,andseriouswateraccumulation李紅點病綠色防控GreenPreventionandControlofPlumRedSpot1、降低越冬菌源基數(shù)

清掃果園病葉、病果，

帶出銷毀Reducethebaseofoverwinteringpathogensources,cleanthediseasedleavesorfruitsintheorchard,Takeoutfordestruction五、防控要點KeyPointsofPreventionandControl2、萌芽之前噴藥Sprayingbeforegermination李紅點病綠色防控GreenPreventionandControlofPlumRedSpot課后小結(jié):After-classsummary:癥狀Symptoms病原Pathogen發(fā)病規(guī)律Pathogenesis發(fā)病條件Epidemicfactor重點：葉面、果實病斑，黃→橙紅色，產(chǎn)生深色小紅點Focuses:spotsonleavesandfruits,yellow→orangered,withsmalldarkredspots真菌，能產(chǎn)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月子囊殼，在病葉、果上越冬。僅一次侵染ThecourseofthediseaseisfromMarchtoSeptember;ascosporesareinitiallyinfectedinMarch,andconidiacomeoutinJulyandAugust.FromOctobertoNovember,theperitheciumoverwintersondiseasedleavesandfruits.Onlyoneinfection

多雨氣候，發(fā)病重；高峰期7月Rainyclimate,severeonset;peakinJuly防控要點KeyPointsofPreventionandControl清除果園病葉、病果，減少越冬菌源量Removediseasedleavesandfruitsfromtheorchardtoreducetheamountofoverwinteringbacteria李紅點病綠色防控GreenPreventionandControlofPlumRedSpot課后作業(yè)：Homework:一、結(jié)合當(dāng)?shù)乩顖@生產(chǎn)實際擬定一套李紅點病的綜合防治方案Combine