World Class. Face to Face. Washington Winegrowers Association Graduate Student Oral Presentation February 7, 2018 ASSESSING SPRAYER TECHNOLOGIES IN WASHINGTON VINEYARDS Margaret McCoy, Graduate Research Assistant wine.wsu.edu
TEAM AND PARTNERS Michelle Moyer Gwen Hoheisel Lav Khot Funded by the Washington State Grape and Wine Research Program
WHAT TO LOOK FOR IN A SPRAYER? Ease of use Can it be customized? Longevity of the machine How well does it work? Mechanical preferences Parts availability Tank size Is it compatible with my crops? Good customer service? Machine size Compatible products? Nozzle style Deposition Suitable pattern? droplet size Is drift an issue? Air volume and direction
WHAT GOES UP, MUST COME DOWN BUT WHERE?
RESEARCH TRIAL Quantum Mist Gregoire On Target
VINEYARD COLLECTION AREAS Canopy Floor Aerial
FIELD DIAGRAM ISO TANDARDS C C C C C C: canopy collection SPRAYER F: floor drift collection D: aerial drift collection
MATERIALS AND METHODS
QUANTUM MIST DESCRIPTION Over the row, multiaxial fan Individual position adjustments Turn fan speed up and down Exchangeable nozzles 6 nozzles per fan Early Season: 50 GPA Late Season: 75 GPA *normalized
SPRAY DEPOSITION: CANOPY *Modified VSP Early Season Late Season Canopy 95.57% 98.48% Floor 1.65% 0.01% Aerial 2.78% 1.51% Percentage of deposition 40% 35% 30% 25% 20% 15% 10% 5% 0% Quantum Mist Canopy Deposition Early Season Late Season 29% 33% 25% 23% 22% 24% 16% 15% 6% 6% Top Right Top Middle Top Left Bottom Right Bottom Left Canopy Zones Early Season: 50 GPA Late Season: 75 GPA *normalized
SPRAY DEPOSITION: FLOOR DRIFT *Modified VSP Early Season Late Season Canopy 95.57% 98.48% Floor 1.65% 0.01% Aerial 2.78% 1.51% Percentage of deposition 160% 140% 120% 100% 80% 60% 40% 20% 0% Quantum Mist Floor Deposition Early Season Late Season 97% 20% 67% 13% 2% 2% 1 Row Over 2 Row Over 3 Row Over Rows from Sprayer Early Season: 50 GPA Late Season: 75 GPA *normalized
SPRAY DEPOSITION: AERIAL DRIFT *Modified VSP Early Season Late Season Canopy 95.57% 98.48% Floor 1.65% 0.01% Aerial 2.78% 1.51% Percentage of deposition 80% 70% 60% 50% 40% 30% 20% 10% 0% Quantum Mist Aerial Deposition Early Season Late Season 56% 46% 25% 27% 27% 18% 1 Row from Sprayer 2 Row from Sprayer 3 Row from Sprayer Rows from Sprayer Early Season: 50 GPA Late Season: 75 GPA *normalized
GREGOIRE DESCRIPTION Over the row Fan is controlled by RPM Don t decrease fan; slobber not droplets Air shear nozzles 5 nozzles per sock Low volume 50 GPA or less Early Season: 25 GPA Late Season: 50 GPA *normalized
SPRAY DEPOSITION: CANOPY *Modified VSP Early Season Late Season Canopy 97.35% 97.08% Floor 0.09% 0.08% Aerial 2.56% 2.84% Percentage of deposition 50% 45% 40% 35% 30% 25% 20% 15% 10% 5% 0% Gregoire Canopy Deposition Early Season Late Season 33% 38% 25% 23% 16% 9% 17% 16% 11% 11% Top Right Top Middle Top Left Bottom Right Bottom Left Canopy Zone Early Season: 25 GPA Late Season: 50 GPA *normalized
SPRAY DEPOSITION: FLOOR DRIFT *Modified VSP Early Season Late Season Canopy 97.35% 97.08% Floor 0.09% 0.08% Aerial 2.56% 2.84% Gregoire Floor Deposition Early Season Late Season Percentage of deposition 200% 180% 160% 140% 120% 100% 80% 60% 40% 20% 0% 90% 95% 4% 3% 6% 2% 1 Row Over 2 Row Over 3 Row Over Rows from Sprayer Early Season: 25 GPA Late Season: 50 GPA *normalized
SPRAY DEPOSITION: AERIAL DRIFT *Modified VSP Early Season Late Season Canopy 97.35% 97.08% Floor 0.09% 0.08% Aerial 2.56% 2.84% Percentage of deposition 160% 140% 120% 100% 80% 60% 40% 20% 0% Gregoire Aerial Deposition Early Season Late Season 96% 23% 24% 52% 3% 1% 1 Row from Sprayer 2 Row from Sprayer 3 Row from Sprayer Rows fromsprayer Early Season: 25 GPA Late Season: 50 GPA *normalized
ON TARGET DESCRIPTION Over the row Directed air Electrostatic Air shear electrostatic nozzles 5 nozzles tube; 2 tubes per arm Low volume 20 GPA Early Season & Late Season: 20 GPA
SPRAY DEPOSITION: CANOPY *Strict VSP Early Season Late Season Canopy 91.79% 80.12% Floor 0.42% 4.05% Aerial 7.79% 15.83% OnTarget percentage of deposition within Full Row canopy zones Early Season Late Season Percentage of deposition 45% 40% 35% 30% 25% 20% 15% 10% 5% 0% 37% 33% 27% 25% 19% 29% 13% 17% Top Right Top Left Bottom Right Bottom Left Canopy Zone Early Season: & Late Season: 20 GPA
SPRAY DEPOSITION: FLOOR DRIFT *Strict VSP Early Season Late Season Canopy 91.79% 80.12% Floor 0.42% 4.05% Aerial 7.79% 15.83% OnTarget Floor Drift percentages between rows away from the sprayer Early Season Late Season Percentage of deposition 120% 100% 80% 60% 40% 20% 0% 80% 84% 18% 12% 3% 4% 1 Row Over 2 Row Over 3 Row Over Rows from Sprayer Early Season: & Late Season: 20 GPA
SPRAY DEPOSITION: AERIAL DRIFT 70% *Strict VSP Early Season Late Season Canopy 91.79% 80.12% Floor 0.42% 4.05% Aerial 7.79% 15.83% OnTarget Aerial Drift percentages above the canopy rows away from the sprayer Early Season Late Season Percentage of deposition 60% 50% 40% 30% 20% 10% 0% 52% 49% 34% 30% 14% 21% 1 Row from Sprayer 2 Row from Sprayer 3 Row from Sprayer Rows from Sprayer Early Season: & Late Season: 20 GPA
SUMMARY AND CONCLUSION All sprayers performed well with high deposition in the canopy Drift was highest in the rows closest to the sprayer Generally, more deposition in the upper zones Mechanical set-up may help distribute this concentration throughout canopy
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