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1、桑病蟲(chóng)發(fā)生的特點(diǎn)徐州市近來(lái)桑樹(shù)病蟲(chóng)害狀況及主要病蟲(chóng)害中種類發(fā)生原因近幾年病蟲(chóng)發(fā)生概況幾種主要病蟲(chóng)害的發(fā)生與防治提綱桑樹(shù)病蟲(chóng)害綜合防治技術(shù)狠抓農(nóng)業(yè)防治，創(chuàng)造控害條件建立縣、鄉(xiāng)兩級(jí)測(cè)報(bào)點(diǎn)，準(zhǔn)確預(yù)報(bào)蟲(chóng)情桑病蟲(chóng)綜合防治措施規(guī)范藥劑防治技術(shù)，合理使用農(nóng)藥近年來(lái),徐州市桑保工作在各級(jí)政府及業(yè)務(wù)部門(mén)的重視和支持下,貫徹“以防為主,綜合防治”的方針,采取常規(guī)測(cè)報(bào)與突擊查報(bào)相結(jié)合的做法,加大宣傳力度,狠抓關(guān)鍵措施的落實(shí),達(dá)到了測(cè)報(bào)準(zhǔn)確,防治適時(shí),防效顯著的目的,控制了主要病蟲(chóng)的蔓延與危害。＊桑樹(shù)蟲(chóng)害sitesscatteredworksurfaceshouldbe
2、distributed.Brickmasonryconstructionismainlydistributedinthefactory,thefactoryworks.8.3.1materialdumpsinmasonryconstructionmaterialsarepiledupinbatchesinthevicinityoftheconstruction,hand-to-mouth,andmaintainacertainreserve.8.3.2supplymortarHZS60concretemixingstationaftermixin
3、gwith5Tdumptrucktransporttothesurfaceoftheconstruction.8.3.3masonrymaterialtransporttransport5Ttipperwithgravelandothermaterialstransportedtothesurfaceoftheconstruction.8.48.4masonryconstruction....Stone),canbeusedtosew,butitsamountshallnotexceedtheweightofmasonry10%.Stonemas
4、onry:accordingtothedegreeofsmoothnessoftheworksurfaceisdividedintofinestones,semifinestone,crudestoneandstonewoolinfour.StoneprocessingrequirementsshouldbeconsistentwiththesurfaceGBJ50203-20026th.theprovisionsofarticle3.2.8.4.2sand,gravel(1)sandandgravelqualityshallconformtoS
5、D120-84table2.1.2and2.1.3requirements.Mortarandsmallersandaggregateconcreteused,requireddiameterof0.15~5mm,finenessmodulusfor2.5~3.0,layingstonemortarsand,itsmaximumdiameterisnotmorethan5mm;stonemortarformasonrysand,maximumsizelessthan2.5mm;(2)withtwo-gradedaggregateconcrete,
6、gravelsizefor5~20mmand20~40mm.8.4.3cementandwater(1)masonryengineeringusingcementandmarkingshallcomplywiththetechnicalprovisionsofsection8.4.theprovisionsofparagraph3.1,arrivalofthecementshouldbevariety,grade,dateofstockpilingseparately,wetlumpsofcement,theprohibitionoftheuse
7、.(2)waterqualitystandardsshouldberequired,mixingmortarandsmallaggregateconcrete.Onmixingandcuringofwaterqualitywhenthereisdoubt,mortarstrengthverificationshouldbecarriedout,thecompressivestrengthofthemortarifthewaterisbelowstandard28daysthecompressivestrengthofmortarmadeofwat
8、erbelow90%,thiswatercannotbeused.8.4.4smallaggregateconcreteandcemen
