Pesticide Application Equipment

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Pesticide Application Equipment
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• NEED
• What GPA is needed or required?
• Lower GPAs less coverage but more acres
• Higher GPAs more coverage but less acres
• Sprayer set up to apply proper GPA?

Water(diluent)
Concentrated pesticide
NOZZLES
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• Nozzles serve three functions
• Regulate the flow of the liquid
• Atomize the liquid stream into droplets
• Spread droplets in a specific pattern

Nozzles
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Nozzle Parts
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Types of Nozzles
BOOMLESS
FLOODJET
FLAT FAN
HOLLOW CONE
TAPERED FLAT FAN
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Nozzle Alignment (TFF)
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Nozzle Orientation TFF
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Nozzle Material

• Brass - wears quickly but cheap
• Polymer - may swell chipping and breakage.
• Stainless steel resists abrasion. High pressures
• Hardened stainless steel - best
• Carbide and ceramic - highly resistant. They are
  recommended for high pressure and abrasive
  sprays. Expensive.

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8003 tip
80 means 80o fan
03 means 0.3 gallons per minute at 40 psi(38 ½
ounces per minute)
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8001
8003
8005
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Comparison of Micron Sizes(approximate)

• 2000 ?m
• 850 ?m
• 420 ?m
• 300 ?m
• 150 ?m
• 100 ?m

• 2 Pencil lead
• paper clip
• staple
• toothbrush bristle
• sewing thread
• human hair

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Nozzle Drop Size Classes
Very Fine to Fine lt 200 um
Medium to Coarse 200 to 450 um
Very Coarse gt 450 um
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DRIFT
BOUNCE
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Driftability of Spray Droplets of Varying Sizes
Crosswind _at_ 3 mph

• 20 m
• 50 m
• 100 m
• 150 m
• m
• 8 ft 22 ft.
  48 ft. 178 ft. 1065 ft.

10 feet
TOO SMALL!
\
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Evaporation of Droplets
High Relative Humidity Low Temperature
Low Relative Humidity High Temperature
Fall Distance
Wind
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3.75 pesticide solution
25 psi
90 Fo
36 R.H.,

• 100 micron droplet evaporates in 7 second
• 200 micron droplets turns into a 100 micron
  droplet in 18 seconds

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TOO BIG!
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Tip Spray Selection by Drop Size
Turbo TeeJet Flat-fan
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Nozzle output
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Checking Nozzle Output
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Check Nozzle Output For a Given Amount of Time!
Nozzle 1
Nozzle 2 Nozzle 3 51
oz 50 oz 42 oz

• Nozzle 1 51 oz
• Nozzle 2 50 oz
• Nozzle 3 42 oz
• 143 oz 3 48 oz. (average)

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Adjuvant Influence on Spray Pattern (Note
Uniformity of Pattern)
LI 700
R-11
Tallow Amine
Water
Source FRI New Zealand
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When Selecting Using Nozzles

• Right droplet size, volume, pattern for the
  job.
• Clean water
• Proper Pressure
• Proper installation
• Uniform flow
• Maintenance
• Limit Drift

High Pressure
Low volumes