How does droplet size affect your fogging application? Take a look at this article to find out!

Average Micron Sizes: Human Hair - 70, Aerosol Spray - 50, ULV Fogger - 20, Thermal Fogger - 5Each type of spray pattern has a specific micron size associated with it. And the micron size can affect an application of insecticide in some important ways:

  • The larger the droplet size the quicker it will fall out of the air and onto a surface.
  • The smaller the droplet size the longer it will remain suspended in the air before it falls onto a surface.

Some factors that affect droplet size are pressure, viscosity, fluid temperature, and surface tension. Increased pressure and increased fluid temperature both decrease droplet size. Increased viscosity and increased surface tension both decrease droplet size.

Knowing these factors, you can increase or decrease the droplet sizes to suit the specific needs for each situation.

Spray Pattern Micron Size Range
Course Spray 400 and larger
Fine Spray 100 – 400
Mist 50 – 100
Aerosols & Fogs 0.1 – 50
Fumes & Smokes 0.001 – 0.1

Droplet Size Impacts Indoor and Outdoor Treatments

Droplet size is important outdoors where drift onto non-target areas can occur. The very small size of droplets produced with fogging make it difficult to ensure the product does not drift into an area where you don’t want it to go. Always be aware of the wind speed if you are fogging outdoors.

Obviously indoors, a fogging application is less likely to drift off target. However, with the lack of air flow while fogging indoors, proper PPE is essential. You can’t stand up-wind of the fog in an enclosed space!

But the long hang time of the smaller droplets can be beneficial for targeting flying pests and to get into spaces other applications might not be able to penetrate.


Learn More:

Photo Credit: Michal Matlon on Unsplash

Related Posts

MGK Joins NPMA as Strategic Partner

Fairfax, VA – September 13, 2022 – The National Pest Management Association (NPMA) today announced the inclusion of MGK as a Strategic Partner of the organization. As a leader in developing safe...

Read More

Pyrethrum Daisies from the Land Down Under

It’s said that farmers are the original environmentalists. Botanical Resources of Australia (BRA) is living that claim. BRA manages pyrethrum farming in Tasmania, Australia for Sumitomo Chemical...

Read More

Carrying pyrethrum flowers in Tanzania

Pyrethrum Company of Tanzania: Building Sustainability and Community

For nearly 50 years, MGK and the Pyrethrum Company of Tanzania (PCT) have enjoyed a satisfying supplier/customer relationship in pyrethrum supply, but it wasn’t until PCT approached MGK about being...

Read More

chevron-right