Calibrating Spray Equipment Page 69 Why Calibrate Better Pest Control Environmental and human safety...
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Transcript of Calibrating Spray Equipment Page 69 Why Calibrate Better Pest Control Environmental and human safety...
Calibrating Spray Calibrating Spray EquipmentEquipment
Page 69
Why CalibrateWhy Calibrate
• Better Pest Control• Environmental and human safety• Effective use of time
– Inadequate control = more treatments• Cost/Benefit ratio
– Lack of calibration = improper mixing– 1 gallon of Tordon per 100 gallons of water
• Will revisit
What’s An Application What’s An Application RateRate
• Gallons of liquid applied per acre• GPA• Water and pesticide mixed• a.k.a.
– Sprayer volume– Sprayer output
• Need to know GPA for mixing
Variables Affecting GPAVariables Affecting GPA
• Ground Speed (MPH)– Speed up = less liquid = lower application rate – Slow down = more liquid = increased application rate
Consistency
Variables Affecting GPAVariables Affecting GPA
• Nozzle Flow Rate– GPM– Depends on
Orifice size
= 0.50 GPM
= 0.20 GPM
Variables Affecting Variables Affecting GPAGPA
• Pressure– 4x pressure to double GPA– Increased pressure = smaller droplets
For Minor Adjustments Only
Variables Affecting GPAVariables Affecting GPA• Spray Width or Spacing
– 100% swath overlapping doubles output
Variables Affecting GPAVariables Affecting GPA
• Nozzle Wear– Worn tips =
• Over application• Erratic patterns
• Label requirements
Figuring Out Figuring Out GPAGPA
More GPA = More Coverage
• Label requirements
Figuring Out GPAFiguring Out GPA
• Determine Your Field Speed
– Know it to maintain it!
200 Feet in 27 seconds20
027= 5 MPH
X 0.682
Buy a Buy a speed speed sensorsensor
• Label requirements• Determine Your Field Speed
Figuring Out Figuring Out GPAGPA
• Collect from each nozzle
- Find GPM Ounces . 128 oz. Per gallon
= Gallons
64 ounces = 0.5
Gallons
• Label requirements• Determine Your Field Speed• Collect from each nozzle
– Want output of one nozzle– Simply plug in the numbers
Figuring Out GPAFiguring Out GPA
GPA is given or required!GPA is given or required!Need GPM for each nozzle!Need GPM for each nozzle!
Rearrange formula
How Much To Add To The How Much To Add To The TankTank
• Acres that can be sprayed with a Acres that can be sprayed with a given volume in the tankgiven volume in the tank
• GPAGPA• Labeled RateLabeled Rate
How Much To Add To The How Much To Add To The TankTank
• Acres that can be sprayed with a Acres that can be sprayed with a given volume in the tankgiven volume in the tank
VolumeGPA
= Acres
500 gal.25 GPA
= 20 Acres
20 Acres x 25 GPA = 500 gallons
How Much To Add To The How Much To Add To The TankTank
• Acres that can be sprayed with a given volume in the tank
• GPA• Labeled RateLabeled Rate
20 acres x 3 pints/acre
= 60 pints
Gallons?
60 pints
8 pints/gal.
= 7.5 gal.
Acres x labeled rate per acre
1 gallon of Tordon per 100 gallons of water- Sprayer applied 50 GPA- Could spray 2 acres with 100 gallons
100 gallons 50 GPA = 2 acres- Rate was 1 quart per acre- Only needed to add 2 quarts per 100
gallons2 acres x 1 quart per acre = 2
quarts per 100 gallons
- Over applied by 2x ($40 per acre)