林业科学英语Unit 5 Lecture 2.pptx

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2025-03-07 发布于广东
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林业科学英语Unit 5 Lecture 2.pptx

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Unit5PestControl

Lecture2ComprehensionofTextA

typedamagetotreesChestnutblightDutchelmdiseaseWhitepineblisterrust

Chestnutblight:stemcankerThestemofthetreewiththisdiseasewillbekilledbygirdlingasthecambiumisdestroyed.

Dutchelmdisease:wiltThefungusgrowsrapidlywithinthevasculartissueoftheelm,anddeathiscausedbyphysicalblockingofthemovementofmoistureandnutrientstothefoliageandperhapsbytheproductionofapoisonthatkillslivingcells.

Whitepineblisterrust:rustThefungusmovesfromtheneedlesintothephloemandcambiumoflimbsandstem.Destructionofthephloemcontinuesuntilthestemisgirdled.

outlinefollowthewriter’slineofthought,distinguishthemainpointsfromsupportingdetailsgraspthelogicaldevelopmentofideas

stepstomakeanoutlineSkimtogetageneraloverviewofthecontent.Dividetheexpositorywritingintosections.Locateandwritedownthethesisstatement.Readparagraphbyparagraph,andfindoutthetopicsentencesofthesupportingparagraphsorsummarizethembyyourself.Listtheexamplesordetailsusedtosupportthethesisstatement.Makeaconclusion.Putwhatyouhavegotintoavisualorganizer.

1.causesoftreediseases3.parasitic(organic)2.nonparasitic(environmental)5.sunscald4.drought7.impropernutrition6.winterinjury9.flooding8.airpollution10.soilpollution12.bacteria11.viruses15.fungi13.nematodes14.mistletoes16.foliagedisease17.stemdisease18.rottingdisease25.e.g.thefusiformrustsofthesouthernpines22.e.g.chestnutblight19.cankers23.e.g.Dutchelmdisease20.wilts24.e.g.whitepineblisterrust21.rusts

criticalthinkingAmericanchestnutwasinfectedwithfunguswhenChinesechestnutwasimported.Inotherwords,sometimesitisriskytoimportforeignspecies.CanyouthinkofsimilarincidentshappenedinChina?Toeffectivelypreventsuchthreat,whatpossiblemeasurescanbetaken?