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1、TREEROWVOLUMEAndrewLandersCornellUniversityNYSAES,GenevaNY14456DILUTEAPPLICATIONSAstandarddiluteapplicationuses400gallonsperacre(gpa)ontraditionaltrees.Modernorchardscontainsmallertreessodon’trequiresomuchvolume.Treerowvolumeiscanopywidth,timesthetreeheight,timesrowlengthperacre.Rowlengthperacr
2、eis43560squarefeetperacredividedbythedistancebetweenrows,infeet.Treerowvolume=canopywidthxtreeheightxrowlengthperacreTreerowvolumetreecanopytree43560sq.ft/acre(cu.ft/acre)=diameterxheightxdistancebetween(feet)(feet)rows(feet)Anexample:Trees10feetwideand8feettallinrows18feetapart=10ftx8ftx43560s
3、q.ft/acre18=80x2420=193,600cu.ftNote:Ittakes0.7–1.0gallonstotreat1000cubicfeetoftree.Thereforetheminimumof0.7gallons/1000cu.ftshouldbeusedinwellprunedtrees.Themaximumof1.0gallon/1000cu.ftshouldbeusedinanunprunedorchardwithathickcanopy.Example:AwellprunedorchardusingminimumsprayvolumeMinimumspra
4、yyourtreerow0.7galVolume=volumex1,000cu.ft(gal./acre)(cu.ft./acre)Minimumspray0.7galVolume=193,600cu.ftx1,000cu.ft=136gal./acre(gal./acre)Example:Atraditional,un-pruned,denseorchardusingmaximumsprayvolumeMaximumsprayyourtreerow1.0galVolume=volumex1,000cu.ft(gal./acre)(cu.ft./acre)Maximumspray1.
5、0galVolume=193,600cu.ftx1,000cu.ft=194gal./acre(gal./acre)CONCENTRATEAPPLICATIONS(Lowvolumeapplication)Concentratesprayingisreducingthegallonsofwaterperacretoreduceoreliminateleafrun-off,oftenreferredtoaslowvolumeapplication.Theacceptableconcentrateleveldependsonseveralfactorsincludingthepestbe
6、ingcontrolled,densityoffoliage,weatherconditionsandthematerialbeingapplied.Concentration=dilutevolumeofwaterperacreconcentratevolumeofwaterperacreIfweareusingapesticidewhichisrecommendedat2lbs/100gallonsdilutebasis,theninthetraditionalorchardabovewewoulduse4lbsin200gallonsofwater(approx.).Ifour
7、sprayerisapplyingat60gallons/acre,thenourconcentrationis:200gal.Water/acre=3Thereforea3Xapplication60gal.Water/acreorIforsprayerisapplyingat50gallons/acre,thenourconcentrationis:200gal.Water/acre=4Thereforea4Xapplication50gal.Wate
