Black Spray Quality and Drop Size[1] (Read Only)

Transcript

1 Pesticide Handler Exposure Task Force A Lesson in Spray Quality and Droplet Size Carol Black Extension Specialist Washington State University www.deere.com

2 Application Exclusion Zone in Outdoor Production • EPA will explain in next talk Distance determined by • – Application equipment – spray/granule • Air • Airblast • Fumigant, mist, fog – If spray • droplet spectrum, noted at 294 microns • Medium spray using VMD >294 microns Let’s Talk about Droplets and Spray Quality

3 Terminology - Micron μ m – μ ) =1/25,000 inch = 1/1,000 millimeter One micron ( m 2000 ( μ m ) thunderstorm rain pencil lead m ) heavy rain 850 ( μ paper clip staple μ 420 ( m ) light rain toothbrush bristle 300 ( μ m ) drizzle heavy thread sewing μ 150 ( m ) fine drizzle human hair 100 ( μ m fine mist ) m ) fog point of a needle 1-25 ( μ Driftable fines under 150 μm

4 Purdue University Publication Spray Spectrum = Quality Put all the Same Similar Sized Droplets in a Test Tube Huge drops Big drops Medium drops Small drops Tiny drops Volume of Spray 400 300 500 200 100 Droplet Diameter (um)

5 Spray Quality and the VMD (volume median diameter) 305 μm volume contains volume contains 50% larger 50% smaller Volume of Spray 300 500 100 400 200 Droplet Diameter (50%) VMD - volume median diameter - Dv0.5 is larger half and smaller Half the total spray volume is This is the MEDIAN, not the average

6 Spray Quality - Explained (50%) DV 0.5 305 μm (10%) DV 0.1 (90%) DV 0.9 80 μm 490 μm Volume of Spray 100 300 200 400 500 Droplet Diameter

7 Spray Quality - Explained DV 0.5 300 μm DV 0.1 DV 0.9 50 μm 550 μm Volume of Spray 100 500 400 200 300 Droplet Diameter Similar VMD Lot’s more fines: < 150 μm Lot’s more basketballs: > 500 μm

8 Spray Quality Based on ASABE 572.1 Standards Referenced in nozzle charts American Society of Agricultural and Biological Engineers

9 Droplet Sizing Measured with a laser -based § instrument. Both reference and nozzles to be classified § Verification and calibration to known standards essential § Nozzle oriented to scan the entire spray plume § Ensure a representative cross - sectional sample of the spray plume is obtained

10 ASABE 572.1 Spray Quality Standard Plot Volume (- - -) of Droplet Sizes on a Reference Graph

11 Spray Quality

12 Spray Quality Color does not equate to Nozzle Color

13 The Color Confusion Challenge: Tips and Spray Quality 80º 80º & 11 0 º > fines 11 0 º

14 GPA A Closer Look & Nozzle Spray of Nozzle Type MPH Quality Color PSI 15- 15- 20- 90 20- 90 30- 11 5 90 100 20- 90 15- 60 15- PSI 90

15 Variety and Selection

16 Droplet Sizes Vary Among Nozzle Types --- % of fines – less than 200 μ m

17

18 Images from Spraying Systems Older and Newer Nozzle Designs

19

20

21 Causes of Spray Drift 1. - Decision Maker Applicator To Spray or – to Stop Spraying • Not to Spray Equipment Set Up • Assesses the Weather • 2. Equipment § Droplet Size § Tip orifice & angle § Spray Height § Operating Speed 3. Weather • Wind Direction • Air Flow or Wind Speed • Air Stability • Temperature and Humidity (drop size) What Inspectors Need to Ascertain!

22 Spray Solution Changes Sizes Droplet • Formulation • Spray Adjuvants – Spreaders, wetting agents – Deposition aids • Tank Mixes

23

24 Spray Adjuvants Some adjuvants hold droplets together, others breakup more easily !

25 Tank Mix Influences Droplet Size 37% 25% 16%

26 Other Important Droplet Issues Relative Span (RS) RS = (Dv0.9 – • Dv0.1) / VMD Dv0.9 = 400, VMD = 300, Dv0.1 = • 100 Ø Relative span = 1 • Dv0.9 = 650, VMD = 300, Dv0.1 = 50 Ø span = 2 Relative • The precision the RS, the greater narrower

27 Why Use Different Fungicides/Insecticides Spray Qualities Contact Herbicides Systemic Herbicides

28 Why Use Different Spray Qualities Broadcast Nozzle Selection Guide

29 Specialty Nozzle Selection Guide

30 9.1 gpa 4.8gpa 13.4 gpa Coverage and Droplet Size Sprayers 101 - T. W o l f

31

32 The Old Guard – Extended Range – XR TeeJet XR XR 8001 8004 XR 80015 XR 8008 XR 8003

33 AIXR Teejet DG Teejet 80 or 110

34 Orchard and Vineyard – ConeJets

35 Aerial and Ground Droplet Calculators

36

37 PREP Archive

38 Acknowledgement Thanks to Bob Wolf, Wolf Consulting LLC, • Kansas State University, University of Illinois • Thanks to Teejet and Winfield Solutions Disclaimer • Brand names appearing in this presentation are for education and illustration purposes only. • No endorsement is intended, not is criticism implied of similar products not mentioned.

39 Thank You

Related documents

corecurr all

corecurr all

Core Curriculum on Tuberculosis: What the Clinician Should Know Sixth Edition 2013 CS234269

More info »
cat51a metric

cat51a metric

Wheaton Facility Aabybro Facility Springeld Facility P.O. Box 7900 Mølhavevej 2 1801 Business Park Drive Wheaton, Illinois DK 9440 Aabybro Springeld, Illinois 60187-7901 USA Denmark 62703 USA www.te...

More info »
Experimental and Theoretical Statics of Liquids Subject to Molecular Forces Only

Experimental and Theoretical Statics of Liquids Subject to Molecular Forces Only

EXPERIMENTAL AND THEORETICAL STATICS OF LIQUIDS SUBJECT TO MOLECULAR FORCES ONLY, BY J. PLATEAU Professor of the University of Ghent, Member of the Academy of Belgium, Correspondent of the Institute o...

More info »
HANDBOOK of METAL ETCHANTS

HANDBOOK of METAL ETCHANTS

HANDBOOK of METAL ETCHANTS Editors Perrin Walker William H. Tarn CRC Press Boca Raton Boston London New York Washington, D.C. © 1991 by CRC Press LLC

More info »
Effect of the Dynamic Cone Angle on the Atomization Performance of a Piezoceramic Vibrating Mesh Atomizer

Effect of the Dynamic Cone Angle on the Atomization Performance of a Piezoceramic Vibrating Mesh Atomizer

applied sciences Article E ff ect of the Dynamic Cone Angle on the Atomization Performance of a Piezoceramic Vibrating Mesh Atomizer 1 2 1,3, , Chuanyu Wu and Jianhui Zhang Qiufeng Yan * 1 State Key L...

More info »
Science Journals — AAAS

Science Journals — AAAS

| RESEARCH ARTICLE SCIENCE ADVANCES PHYSICS Copyright © 2019 The Authors, some rights reserved; Final fate of a Leidenfrost droplet: Explosion or takeoff exclusive licensee American Association 3 1 1 ...

More info »
Science Journals — AAAS

Science Journals — AAAS

| RESEARCH ARTICLE SCIENCE ADVANCES PHYSICS Copyright © 2019 The Authors, some rights reserved; Final fate of a Leidenfrost droplet: Explosion or takeoff exclusive licensee American Association 3 1 1 ...

More info »
InfectiousDiseaseControlGuide

InfectiousDiseaseControlGuide

Randy I. Dorn • State Superintendent Office of Superintendent of Public Instruction Old Capitol Building • P.O. Box 47200 - 7200 Olympia, WA 98504 Infectious Disease Control Guide for School Staff 201...

More info »
CFOC3 updated final

CFOC3 updated final

Caring for Our Children: National Health and Safety Performance Standards; Guidelines for Early Care and Education Programs, Third Edition A Joint Collaborative Project of American Academy of Pediatri...

More info »
Thriving on Our Changing Planet: A Decadal Strategy for Earth Observation from Space

Thriving on Our Changing Planet: A Decadal Strategy for Earth Observation from Space

TIONAL ACADEMIES PRESS THE NA This PDF is available at http://nap.edu/24938 SHARE     Thriving on Our Changing Planet: A Decadal Strategy for Earth Observation from Space DET AILS 700 pages | 8.5 ...

More info »
CFOC4 pdf  FINAL

CFOC4 pdf FINAL

National Health and Safety Performance Standards • Guidelines for Early Care and Education Programs, 4th Edition Caring for Our Children Caring for Our Children Caring for Our National Health and Safe...

More info »
Peer Review Draft TR 595: Peer Review Date March 24 26, 2018

Peer Review Draft TR 595: Peer Review Date March 24 26, 2018

NTP TECHNICAL REPORT ON THE TOXICOLOGY AND CARCINOGENESIS STUDIES IN Hsd:SPRAGUE DAWLEY SD RATS EXPOSED TO WHOLE-BODY RADIO FREQUENCY AT A FREQUENCY (900 MHz) AND RADIATION GSM AND CDMA MODULATIONS ( ...

More info »
Microfluidic Synthesis of Vinblastine Loaded Multifunctional Particles for Magnetically Responsive Controlled Drug Release

Microfluidic Synthesis of Vinblastine Loaded Multifunctional Particles for Magnetically Responsive Controlled Drug Release

pharmaceutics Article Microfluidic Synthesis of Vinblastine-Loaded Multifunctional Particles for Magnetically Responsive Controlled Drug Release 2,3, 1,2 1,2 1, *, Ya-Chin Wang , Wei-Ting Wang and , C...

More info »
10031986

10031986

™ Library Quantification Kit for Illumina TruSeq ddPCR Catalog # Description 186-3040 , 200 x 20 μl reactions, includes ddPCR Supermix for Probes (no dUTP) (2 x 1 ml vials), ddPCR ddPCR Library Quanti...

More info »
Establishment of a rat ovarian peritoneal metastasis model to study pressurized intraperitoneal aerosol chemotherapy (PIPAC)

Establishment of a rat ovarian peritoneal metastasis model to study pressurized intraperitoneal aerosol chemotherapy (PIPAC)

(2019) 19:424 etal.BMCCancer Van de Sande https://doi.org/10.1186/s12885-019-5658-5 TECHNICAL ADVANCE Open Access Establishment of a rat ovarian peritoneal metastasis model to study pressurized intrap...

More info »
Exaggeration and cooption of innate immunity for social defense

Exaggeration and cooption of innate immunity for social defense

Exaggeration and cooption of innate immunity for social defense c a d e a,b a,1 , Minoru Moriyama , Chiyo Noda Mayako Kutsukake , , Naruo Nikoh , Xian-Ying Meng , Shuji Shigenobu a,g,h,1 f Satoru Koba...

More info »
Slide 1

Slide 1

USAMRIID’s Pocket Reference Guide to Biological Select Agents & Toxins

More info »
description

description

NCAR/TN–464+STR NCAR TECHNICAL NOTE June 2004 Description of the NCAR Community Atmosphere Model (CAM 3.0) William D. Collins Philip J. Rasch Byron A. Boville James J. Hack James R. McCaa David L. Wil...

More info »
oil spill science where did oil go

oil spill science where did oil go

THE SEA GRANT DEEPWATER HORIZON: WHERE DID THE OIL GO? G O MRI and PARTNERSHIP Larissa Graham, Christine Hale, Emily Maung-Douglass, Stephen Monica Wilson, The mission of Sea Grant is Sempier, Tara Sk...

More info »
P0818 0826 AN CS3e.indd

P0818 0826 AN CS3e.indd

Silencer Compact Resin Type/Male Thread RoHS Series AN05 to 40 How to Order 02 AN 20 Thread connection port size Body size Port size Symbol Applicable model Symbol Thread type 05 M5 x 0.8 AN05 M5 M th...

More info »