Mosquito season is upon us. Here's what you should know about mosquito-killing spray used in Larimer County. Jacy Marmaduke
A sprayer truck at the Colorado Mosquito Control Northern Front Range Office in Loveland on Monday, July 25, 2016. (Photo: Valerie Mosley/The Coloradoan)Buy Photo
As Fort Collins prepares for its second mosquito spray of the season, some residents might be wondering what exactly is in the mist released from roaming pickup trucks.
Here's what we know about the mosquito-killing pesticide used by contractor Vector Disease Control International, which will handle spraying in south Fort Collins on Thursday and Sunday nights.
The product is called Aqua Kontrol 3030.
It kills most mosquitoes, gnats and flies on contact with an active ingredient of permethrin, a pesticide also used in lice shampoo and flea treatments. Aqua Kontrol 3030 contains 30 percent permethrin.
VDCI Loveland operations manager Broox Boze previously told the Coloradoan that the spray kills 75 to 80 percent of mosquitoes it touches. The ultra-fine mist contains particles about one-fifth the width of a human hair.
Story continues below fact sheet.Permethrin fact sheet | Medical Specialties
The spray can be toxic to wildlife.
Aqua Kontrol 3030 is "extremely toxic" to fish and aquatic invertebrates and "highly toxic" to bees, according to the Environmental Protection Agency, so applicators have to carefully avoid waterways and spraying during windy weather.
Boze previously told the Coloradoan the particles sprayed from the trucks are too fine to kill larger insects such as bees or butterflies, and she added that properly applied spray isn't known to harm birds or mammals. Permethrin is slightly toxic to birds, according to the Material Safety Data Sheet for Aqua Kontrol 3030.
Workers apply the mist at night when mosquitoes are active and pollinating insects are not.
You can take steps to reduce exposure.
Stay inside for 30 to 60 minutes after spraying takes place in your area, and keep your doors and windows closed. Keep your pets inside during that period, too.
Although Boze said less than 10 percent of the spray ends up touching the ground, you might consider covering organic gardens and water features with a tarp or cloth covering.
Spraying takes place in areas that pass the city and/or county thresholds for infection risk.
Both Fort Collins and Larimer County track the vector indices in four quadrants of the city, although areas identified for spraying are often smaller than a whole quadrant. A vector index is a figure meant to convey the risk of getting West Nile virus in an area. Fort Collins' threshold for spraying is higher than the county's, so both entities chip in for spraying when an area surpasses both thresholds.
Nearly all of the Fort Collins spraying during the last several years has been in south Fort Collins, where vector indices tend to be substantially higher than those in other parts of the city.
Spraying in an area significantly reduces a person's chance of contracting West Nile virus there for about three weeks, Larimer County health department spokeswoman Katie O'Donnell previously told the Coloradoan.
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Source : https://www.coloradoan.com/story/news/2018/09/05/curious-fort-collins-mosquito-spray-heres-what-know/1205994002/879