Summer Adult Mosquito Control Efforts Set for Lonsdale
LONSDALE (MAY 7, 2026) – The City of Lonsdale has announced that adult mosquito control spraying will take place this summer at dusk, as conditions warrant. For the last seven years, the City contracted with Clarke to help reduce the nuisance and public health threat posed by mosquitoes. This year, the City will be contracting with Vector Disease Control International (VDCI) located in Oakdale, MN and we look forward to another successful spraying season.
Spraying will be done at dusk weekly on Tuesday’s beginning on May 26th and continue through September 15th. In addition to spraying, surface water treatment will also be conducted. This will be done by placing organic larvicide VectoMax WSP/CG: OMRI Organic “pellets”, which are effective for 45 days, in shallow bodies of water to prevent the growth of mosquito larva. Monitoring will be conducted and pellets added, if necessary, every 21-day. The pellets can be applied to areas that contain fish, other aquatic life and plants. In theory, this should reduce the number of adult mosquitoes that need to be sprayed for.
If it is not possible to spray because of rain, etc., the scheduled spraying missed will be done as soon as possible after the scheduled date. Also, if there is not much precipitation and less mosquito larva are hatching, one application may be skipped. In addition to Tuesdays, spraying will also be conducted on the following Thursdays: July 2nd, August 6th and September 3rd. Spray dates will be listed in the City’s website calendar.
Adulticiding attacks adult mosquitoes with a truck-mounted application of ultra-low volume spray, which is regulated by vehicle speed. The slower the vehicle speed, less volume and the higher the vehicle speed, more volume. Aqua Reslin, a water-based insecticide will be used and has been approved specifically for this purpose and is regulated by the Environmental Protection Agency (EPA). Information on the insecticide being used is posted on the City’s website at www.lonsdalemn.com.
In addition to the City’s mosquito control initiatives, residents can take a number of steps to reduce the mosquito population around your homes this summer by:
- Removing or emptying water in old tires, tin cans, buckets, drums, bottles or other places where mosquitoes might breed.
- Emptying plastic wading pools at least once a week and store indoors when not in use. If unused, drain swimming pools and keep dry.
- Changing water weekly in birdbaths, plant saucers and trays.
- Storing boats covered, tilted or upside down.
- Water bowls used by pets should be emptied and refilled daily.
- Filling holes around home that may retain water.
- Keeping gutters around home in good repair to avoid water build-up.
- Keeping weeds and grass cut short, as adult mosquitoes look for shady places to rest during hot daylight hours.
- Being sure screens in homes are intact and tight-fitting to prevent entry of insects.
- After rainfalls, check and drain water on tarps covering woodpiles, boats, equipment, etc.
If you have questions or are looking for more information about the mosquito control program, feel free to contact City Hall at 507-744-2327, ext. 6 or call the VDCI’s Mosquito Hotline Citizen Response phone number at 612-997-0143.
Safety Data Sheets