What is Barrier Control?
Years ago, it was discovered that by applying a perimeter strip of barrier protection, mosquitoes, while they were physically capable, would refrain from flying across the barrier, thus giving an area of protection. This proved exceptionally effective for campgrounds, animal shelters and lots, parks, and other areas where it was not feasible to put insecticide directly onto the site to be protected.
How to do it.
Using a campground as an example, a typical applicator would probably use a motorized mist blower (not a fogger) that would have a very high air volume to blow the mist 20-40 foot or, a tank sprayer having a higher pressure pump, either of which could produce mist particles in the 50-100 micron range (that is like a very fine mist). The person making the application would walk around the perimeter of the area to be protected - applying a light (not wetting) mist to the grass, foliage, shrubbery, etc. in about a 30 foot or more wide band. To do this, they would walk at a slow steady pace and move the outlet wand or sprayer nozzle from side to side - applying the light mist as they go.
MCI's Methods of Application
Here at MCI, we use 2 different barrier control sprayers, the Residual Alley Sprayer (RAS) and the Off-Road Large Area Sprayer (ORLAS). These were designed and engineered by Matt Welter of MCI and are used exclusively by MCI. Both of these sprayers are truck-mounted, allowing us to do barrier control while on our regular TUG spray routes. They spray a fine, residual mist that coats the habitat and repels and/or kills the mosquitoes upon contact for up to 3 weeks, dependent on weather conditions (i.e. rain tends to wash it away). Each type of barrier control sprayer has a different purpose, as is detailed below.
Other equipment we have available for Barrier Control
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