Comparison of Spray Droplet Characteristics for Nozzles Used

Nozzle Efficacy/Drift Slope No zz le Extended Range de ve lop me nt •

New 2008 Test Nozzles! Turbo Twin. Jet Guardian. Air - Hypro Air Mix &

Objective The objective of this study was to compare droplet spectra characteristics for nozzle

Materials and Methods cont. : 24 ft. spray bar 7. 5 GPA @ 10

Materials and Methods cont. : 1. XR Flat-fan (XR) 2. DR Flat-fan DR 3.

Droplet. Scan used to analyze droplets Droplet scan software was used for droplet characteristics

Droplet Size a b d bc bc cd d d c cd ef f

Findings • Statistical differences were found for all droplet characteristics measured. • TTI -

Conclusions: • The findings support that the use of nozzle types producing smaller droplets

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Comparison of Spray Droplet Characteristics for Nozzles Used for Agronomic Weed Control Robert Wolf Cory Friedli and Brian Lauer Biological and Agricultural Engineering Dept.

Nozzle Efficacy/Drift Slope No zz le Extended Range de ve lop me nt • XR, TR • • Turbo Flood Turbo Tee. Jet • • • Air Mix AI XR Guardian. Air Chamber Design tim eli ne Venturi Design - II Venturi Design - I • • • AI Ultra Low Drift Turbo Drop • TTI

New 2008 Test Nozzles! Turbo Twin. Jet Guardian. Air - Hypro Air Mix & TDHSTF- Greenleaf AI XR Tee. Jet

Objective The objective of this study was to compare droplet spectra characteristics for nozzle types used to apply postemergence herbicides.

Materials and Methods cont. : 24 ft. spray bar 7. 5 GPA @ 10 MPH 0. 24 GPM / nozzle Nozzle Spacing: 20 in. Boom Height: 20 in.

Materials and Methods cont. : 1. XR Flat-fan (XR) 2. DR Flat-fan DR 3. Turbo Flat-fan (TT) 4. Turbo Twin Flat-fan (TTJ 60) 5. AIC Venturi Flat-fan 6. Turbo. Drop High Speed Twin-fan 7. Ultra Lo Drift (ULD) 8. TTI Venturi Flat-fan 9. BFS Venturi Flat-fan 10. AIXR Venturi Flat-fan (AIXR) 11. Air Mix Venturi Flat-fan (AM) 12. Guardian. Air Venturi Flat-fan (GA)

Results Discussion

Droplet. Scan used to analyze droplets Droplet scan software was used for droplet characteristics Volume Median Diameter, Percent Area Coverage, Deposition Statistical analysis with SAS

Droplet Size a b d bc bc cd d d c cd ef f

Coverge cd cd bc bc c cde de a b cd f a

Deposition b b b

Findings • Statistical differences were found for all droplet characteristics measured. • TTI - largest droplets, with lowest coverage and deposition. • XR - smallest droplets, with most coverage and deposition. • ULD – middle on droplet size, 2 nd best coverage and deposition. • Venturi design II group as an average had smaller droplets, better coverage and deposition than the venturi design I group.

Conclusions: • The findings support that the use of nozzle types producing smaller droplets tend to have more coverage and deposition than those producing larger droplets. • Data also supports that the newer designs in venturi nozzles will provide more coverage and deposition than the older venturi nozzle designs.

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