ASTM_E_2798_-_11.pdf

Designation:E279811Standard Test Method forCharacterization of Performance of Pesticide Spray DriftReduction Adjuvants for Ground Application1This standard is issued under the fixed designation E2798;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method is used to characterize the performanceof pesticide spray drift reduction adjuvants with respect tospray droplet size spectra,volume of fines,and other useparameters under simulated field ground application condi-tions.This test method does not include any procedures toevaluate if pump shear degrades the performance of the spraydrift reduction adjuvant.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.NOTE1This method uses industry-standard units.The followingconversions to SI units are provided for convenience:1 mph=1.61 kph;1 in=2.54 cm;1 gal/acre=9.36 L/hectare.1.3 This test method does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D3825 Test Method for Dynamic Surface Tension by theFast-Bubble TechniqueE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE456 Terminology Relating to Quality and StatisticsE609 Terminology Relating to PesticidesE799 Practice for Determining Data Criteria and Processingfor Liquid Drop Size AnalysisE1260 Test Method for Determining Liquid Drop SizeCharacteristics in a Spray Using Optical NonimagingLight-Scattering InstrumentsE1519 Terminology Relating to Agricultural Tank Mix Ad-juvantsE1620 Terminology Relating to Liquid Particles and Atomi-zationE2408 Test Method for Relative Extensional Viscosity ofAgricultural Spray Tank Mixes2.2 ASABE Standards:3ASAE S572.1 Spray Nozzle Classification by Droplet Spec-tra,March 20092.3 NFPA Standards:4NFPA 30 Flammable and Combustible Liquids CodeNFPA 33 Standard for Spray Application Using Flammableor Combustible Materials3.Terminology3.1 Definitions for terms used in this test method can befound in Terminologies E456,E609,E1519,and E1620.4.Summary of Test Method4.1 This test method provides guidelines for the measure-ment of parameters pertaining to the performance of driftreduction adjuvants under simulated field ground applicationconditions.The measurements can be made in a wind tunnel orspray chamber.The method describes the preparation,compo-sition,and test/application conditions for droplet size and spraypattern measurements.Exact selection of application condi-tions,such as nozzle type and tank mix partners,may varyaccording to intended use conditions.This test method has notbeen verified for aerial and orchard airblast pesticide applica-tions.5.Significance and Use5.1 Pesticide regulations for the minimization of drift duringpesticide application often require active ingredient(a.i.)product use under defined droplet size conditions.Sprayperformance with respect to transport and deposition of drop-lets and particles at target surfaces and product efficacy for1This test method is under the jurisdiction of ASTM Committee E35 onPesticides,Antimicrobials,and Alternative Control Agents and is the directresponsibility of Subcommittee E35.22 on Pesticide Formulations and DeliverySystems.Current edition approved Jan.1,2011.Published February 2011.DOI:10:1520/E279811.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American Society of Agricultural and Biological Engineers(ASABE),2950 Niles Rd.,St.Joseph,MI 49085,http:/www.asabe.org.4Available from National Fire Protection Association(NFPA),1 BatterymarchPark,Quincy,MA 02169-7471,http:/www.nfpa.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 desired applications are also affected by droplet size spectra.The effect of drift reduction adjuvants on droplet size spectrashould be understood in this context.The present test methoddescribes standard tests that can be conducted to investigate theperformance of pesticide spray drift reduction adjuvants undersimulated field use conditions for drift management decisionsin the context of the entire spraying process.The measuredreduction in driftable fines and shift in spray droplet sizedistribution can be used to reduce the buffer zones mandated byregulatory agencies.6.Apparatus6.1 Spray chamber or wind tunnel of known air flowcharacter