lessons learned from the evaluation of a pessl for sprayer calibration
DESCRIPTION
This presents our lessons learned after working with orchard and vineyard sprayers. We examined nozzle output and vertical spray patterns.TRANSCRIPT
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Lessons learned and evaluation of Pessl spray calibration machine
Gwen-Alyn HoheiselWSU ExtensionGrapes, Tree Fruit, Other Specialty Crops
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Background
What we know ….
1. Calibration is critical2. Good coverage is critical3. Canopy shape can change between crops and
blocks4. We should spend more time on our sprayers,
but….
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Our Evaluation
May 27-June 19 we tested a Pessl
1. Can it be used in extension/farm operations to calibrate vertical spray patterns?
2. How are some of our Washington sprayers performing?
WSU Pest Management
Transition Project
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The Pessl
Make these bullets, just plain apple, cherry or grape
• Evaluates nozzle output on standard T-jet nozzles
• Assesses vertical spray distribution of any sprayer
• Outputs data to a computer where reports can be generated.
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The Pessl
Make these bullets, just plain apple, cherry or grape
Test 1: Nozzle Output
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The Pessl
Make these bullets, just plain apple, cherry or grape
Test 2: Vertical Spray Pattern
Spray 14’ to 20” from ground
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Our Evaluations
4 Field Days
16 Growers
1 Manufacturer
From Okanagon to Prosser
Food For Thought
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Grower Calibrations – Nozzles
3. Even with a defined maintenance schedule still problems
1. Only 1 airblast sprayer had 100% of their nozzles working properly.
2. Range from manufacturer specifications = -43.1% to 44.5%
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6’
Grower Calibrations – Patterns Before
7’9.5’
After
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Airblast Sprayers: • Almost always a bad
pattern until nozzles corrected
• Easy to adjust
• Can easily keep track of multiple angles for various shaped canopies
Sprayer PerformanceRemember limited n
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Cropland Tower Sprayer: • Initial patterns were consistently in
a sinus wave • • Pattern was improved by
broadening spray (i.e. increased distance from canopy and angled nozzles out)
• Fairly intuitive/user friendly to adjust
Sprayer PerformanceRemember limited n
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6-headed tower sprayer (Accutech):
• Usually good distribution, but needed to shift up.
• Confusing to operator on how to adjust spray.
• Easy to adjust angle of entire head.
• No clogged nozzles
Sprayer PerformanceRemember limited n
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4-headed tower sprayers (Accutech & LectroBlast):
• Initial spray set with heads at maximum distance apart.
• Good swirl, bad pattern
• Bring the heads closer together.
Sprayer PerformanceRemember limited n
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The Future
Development Of A Smart Targeted Spray Application Technology Roadmap
For Specialty Crops Hoheisel, Gwen-Alyn -- Washington State University Brunner, Jay -- Washington State University Castagnoli, Steve -- Oregon State University Giles, Ken -- UC Davis Derksen, Rich -- USDA-ARS Landers, Andrew -- Cornell University Niederholzer, Franz -- UC Ag Natural Resources Pitts, Marvin -- Washington State University Zalom, Frank -- UC Davis Zhang, Qin -- Washington State University
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The FutureAn SCRI Planning Grant
Bring groups of people together
Our thoughts Collaborative WorkAsk the Industries to guide our workDevelop a long-term coordinated effort for
grapes, tree fruit and nuts.
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The FutureOur Defined Goals in Grant
1) identify application technology needs of producers and manufactures;
2) review and assess existing application technologies plus relevant or supporting technologies integratable to more efficient application;
3) identify roadblocks to adoption of existing application aids; 4) create a roadmap for application technology research and extension; and
5) develop a full scale proposal for research and extension in FY 2011.
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The FutureAccomplished by….
1. Literature Review
2. Survey
3. Focus Group Meetings & Other communications
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The FutureMost Important Item …….
We listen to you.You guide our efforts.