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IntroductionNeedleblightofPinussylvcsIrisvarmongolicaisoneofthemaindiseaseonPinus3:VlvesIrlAvar.mongolicawhichisanativesPeciesinthearcabetWecnHulunbcirgrasslandandforest.Thisdiscaseisnotcdforscriousinfestation,fastspreadanddifficulttobecontrolled.Inthepas… 相似文献
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1989年在中蒙边境樟子松林区大面积发生樟子松针桔痛，该痛危害严重．故笔者于19q4年～1996年对该痛原进行了分离培养．经鉴定引起该病害的痛原菌为偃松壳针孢(SeptoriapinitmmilaeSawada)和松走褥盘抱(Dothistroma pini Hulbary)．偃松壳针抱的分生孢干器球形， 相似文献
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MateriaIsandmethodsProbabilitydiStributionpatternInvesUgatiOnmethodSThespacedistributionOfneedIebrightwasinvesti-g8tedinHonghuarerjiForestFarmandHuiheForestFarmfromJunetoJulyin1996.Theelevationofthestudyareasis7oo-11oom.Theageofthetreesare24~35a.Canopydensitiesrangedfromo.4too-7.TherewerenoshrubsonforestfIoor.TotaIly12plotsweresatupand3otreesforeachpIOtwereinvesti-gated.Theinform8tionwasreportedaccoFdingtoThbIe1.POiSsondistTfoutfon:Where:mistotalaveragevaIue,whichcanbecalcu-Iated… 相似文献
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AIargeareaofscotchpines(PinusSyvesthevar-mongoHCa)wasdestroyedbySoptOrfapIhFPutffil8eandDothisbomapiniinHonghuaerjiforestregion,lnnerMongolia,in199o~1997.TheoutputSofseedsandconeswerereduced.NorepoFtoncontroIofSePtOFiapinFPutffiI8ehasbeenfoundinChina.ThetwodiseasesmostseriouslydestroyedscotChpines.ln199o~1994,theinfeCtedrateofnurserystockreached97.3%andabout6oooohm2treeswereinfeCtedindifferentdegrees.Atpresent,thecontroItechniqueforthemixedinfeCtionofthetWodiseaseshasnotbeenreporte… 相似文献
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为合理的防治措施,对樟子松针枯病进行了木材损失及相应的损失模型和防治指标的研究。结果表明,经济危害允许水平为３１．２０３,防治指标为,病情指数为３１ ,叶面积损失每株达２．４０４４３８ｍ＾２,影响较大,应进行防治;病情指数小于３１时,对树木生长影响不大。 相似文献
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