Agserv   droplets aren't droplets
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Agserv droplets aren't droplets

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Agserv   droplets aren't droplets Agserv droplets aren't droplets Presentation Transcript

  • DROPLETS AINT DROPLETS Agserv
  • Droplets aint droplets. • Understanding droplet size. • Different methods of application. – Equipment – Nozzles • Getting the best from you chemicals through correct application.
  • Understanding droplet size. Measure • Microns (μm) (micrometers). One micron equals 0.001 mm. • Droplet size is diameter of individual droplet • Droplet spectrum is the distribution of droplets from a devise or nozzle to form classes
  • Equipment Types of application Surface/Soil 1. Fine surface spray 2. Surface spray 3. Flooding 4. Foaming Space 1. Fog 2. ULV 3. Mist 4. Aerosol
  • • Thermal fogging, smoke generation • Around 10 Micron Thermal foggers: uses high temperatures to produce large quantities of fog without degrading the active ingredient. Thermal foggers produce a very large quantity of very small droplets, very quickly. 1. Fog
  • 2. ULV Ultra low volume (ULV) fogging machines • Fogging machines that use large volumes of air at low pressures to transform liquid into droplets that are dispersed into the atmosphere. • This type of fogging machine can produce extremely small droplets with diameters ranging from 1-50 µm. • True ULV less than 50 µm • ULV often confused with misting • Application: Mosquito control, Bird Control, Midges & other flying insects. Cyclone from Dyna Fog LR 18 Longray
  • 3. Mist • Misting or cold fogging • Droplet size 20 -150 µm • Very common in PCO Dynafog Hurricane Fogmaster TrijetLongray 2680
  • 4. Aerosol
  • Aerosol • Invented 75 years ago by Eric Rotheim • Took off in WW2 • 1st in Australia Mortein in 1950 • 0.1 to 50 µm • CFC banned Jan 1996 (chlorofluorocarbon) Aerosol Applicators • B&G BOC – Pestigas • High-pressure (5,000kPa) Aerosol spray (droplets range 2-20µ). Non-flammable, liquid CO2 4. Aerosol
  • Actisol® Compact UnitB&G - Portable Aerosol System 4. Aerosol
  • The influence of droplet size Increased coverage = Increase efficacy Turf Jet Turbo Teejet XR Flat fan
  • Surface Spray 1. Fine surface spray – Back pack mister – Fine nozzle 2. Surface spray – Traditional pressure sprayer – Truck mount, hand hose
  • Back pack mister • Fast to apply • Very even fine application • Drift issue • 11.5 M throw • Huge range of droplet size • Droplet sheer NB: Label states surface spray only
  • Patterns SSSS 1.SSS. a.SSS These classes (very fine, fine, medium, coarse, very coarse, and extremely coarse)
  • SSSS SSSS 1.SSS. a.SSS
  • Minimising Drift 34% driftable droplets 12% driftable droplets <1% driftable droplets <1% driftable droplets
  • Nozzle Selection •There are many types of nozzles – Flat Fan Standard – Flat Fan - Drift Reduction – Anvil – Hollow Cone – Full Cone – Double Outlet – Off Centre – Twin Fluid – Banding (or Evenspray)
  • 5. Foaming • Mix water & air with a foaming agent (Detergent) you get foam • More air dryer foam • Thorough surface application in the long run.
  • • Versafoamer HH can be used to apply foam to wall voids…
  • 4. Flooding & Injecting