This Was A New Weapon For Pest Control – The Mist Blower

A new regime in pest control nears reality as portable mist blowers appear on the market. 

The chief merits of these blowers, in comparison with old-style spray and dust outfits, are their ability to do a thorough job with vast savings in materials, time, and labor.

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Smallest And Newest Of The Mist Blowers

The smallest and newest of the mist blowers is a one-man affair weighing about 100 pounds that can be carried on a wheelbarrow. 

Versatile and wieldy, it can handle insecticides, fungicides, hormone preparations, or combination formulas in solution, suspension, or emulsion. 

It can throw a fog of pesticides to cover trees up to 35′ feet tall, or horizontally over turf or vegetation to a distance of 200′ feet.

Method Of Reducing The Materials With Mist Blowers

The secret of reducing by as much as 99% the volume of materials used by the mist blowers lies in the method by which air is blasted into the concentrated liquid, thus converting it into droplets of infinitesimal size.

“These are so small that one gallon applied by the mist method is equal to 500 to 1000 gallons of dilute spray,” says S. F. Potts, originator of the method and a member of the staff of the U. S. Bureau of Entomology and Plant Quarantine at New Haven, Conn.

“Examples of high pesticide concentration used in the formulas are illustrated by mixtures containing as much as three pounds Of DDT, or six of lead arsenate, cryolite, or wettable sulfur. per gallon of liquid,” he writes.

Mist Application

By the mist application, one gallop covers from four to eight large trees or an acre of woodland. 

With dilute spray, 30 gallons is not an overdose for a single tree, while 300 gallons is commonly used in treating one-half acre of woodland. 

With the mist blower, forest areas have been treated in one-sixteenth of the time required for liquid spraying. 

There is no wasteful runoff, no undesirable tank residue to be disposed of, and no call for constantly refilling tanks with water.

Effects Of Mist Blower

Mr. Potts says that a mist blower treated 30 acres of potatoes in 2 hours and an 18-hole golf course for Japanese beetles and mosquitoes in half a day.

While the larger mist units with powerful engines and 20-gallon or larger tanks are destined for use in forests, or in large-scale planting-s and orchards. 

The 1- to 3-gallon models will be most serviceable in groups of gardens, on estates, and for the treatment of young fruit trees, low-growing ornamentals, and turf. 

Development Of Small Machine

The small machine was developed by Mr. Potts in collaboration with K. Spenser of the Connecticut Agricultural Experiment Station.

One available portable blower is equipped with a 1.3 horse-power Lausen gasoline engine, a small blower that delivers air at high velocity, and a small pump that sprays up to two gallons a minute at 10 pounds pressure and can handle all types of concentrates. 

The nozzle is a capillary tube type fitted with four liquid tubes projecting into a 1 ¼”-inch outlet. 

Air traveling by these small tubes from which liquid flows atomizes the spray and serves as a carrier. The Unk capacity is two gallons.

Used Of The Machine

This machine is mounted on a wheelbarrow chassis, the handle grips of which are the controls. 

One handle provides a quick shut-off valve for the li-laid line and the other controls the blower. There is also a small hose for time work. The whole unit can be manipulated by one person.

Insects Controlled By Mist Spraying 

Among the more than 50 insects that him been successfully controlled by mist spraying, Mr. Potts mentions the following:

  • Japanese Beetles 
  • Pear Psylla 
  • Pea Aphids
  • Potato Leafhoppers
  • Flea Beetles
  • Sawflies
  • House Flies
  • Mosquitoes

While many formulas of concentrate sprays have been worked out by the USDA and cooperating agencies. They are still in the testing stage. 

Mr. Pptts suggests that the “quantity of toxicant per tree or per acre should approximate that used in dilute spray application until the correct concentrated dosage is arrived at through experimentation.”

44659 by Katherine P. Plumb