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1、桑病虫发生的特点徐州市近来桑树病虫害状况及主要病虫害中种类发生原因近几年病虫发生概况几种主要病虫害的发生与防治提纲桑树病虫害综合防治技术狠抓农业防治，创造控害条件建立县、乡两级测报点，准确预报虫情桑病虫综合防治措施规范药剂防治技术，合理使用农药近年来,徐州市桑保工作在各级政府及业务部门的重视和支持下,贯彻“以防为主,综合防治”的方针,采取常规测报与突击查报相结合的做法,加大宣传力度,狠抓关键措施的落实,达到了测报准确,防治适时,防效显著的目的,控制了主要病虫的蔓延与危害。＊桑树虫害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
