See below for the latest updates on West Nile Virus activity from the Canyon County Mosquito Abatement District.

July 28, 2017: Two mosquito surveillance traps located along the Boise River between Middleton and Caldwell have tested positive for West Nile Virus.  One trap located near Channel Road and River Road and the second trap collected was located near Middleton Road, Boise River bridge.  Areas around the two trap sites have been experiencing receding flood waters from the Boise River which has created many standing water pools.  Mosquito abatement operations have been completed around the affected areas with follow up treatments to be finished by the end of the weekend.   Also, the areas along the river between Middleton Road Bridge and the Hwy 30 “Old Bridge” and Plymouth Street, Caldwell is scheduled for an aerial treatment of the mosquito larvae control product (Bacillus thuringiensis israelensis) Bti bacteria by the end of the weekend, weather permitting.

Routine mosquito abatement operations are ongoing throughout the District by ground larvicide crews and larvicide operations by air. Ultra-Low Volume (“fogging”) by truck mounted ULV equipment will continue to be the District’s response to elevated “Culex” species, West Nile virus vectors.  Because of persistent hot weather for next several weeks, it is very important to avoid mosquito bites by following practices known as the “7 D’s”.

  • DRAIN any standing water on your property that may cause mosquitos and remember: Do Not Over Irrigate.
  • DAWN and DUSK are times to avoid outdoors.
  • DRESS appropriately by wearing long sleeve shirts and long pants when outdoors.
  • DEFEND yourself against mosquitoes by using an insect repellant using the active ingredients of either DEET, Picaridin or Lemon Eucalyptus. Mosquito repellant is the number one defense to prevent getting bitten by an infected mosquito.
  • DOOR and window screens should be in good conditions to prevent mosquitos form entering your home.
  • DISTRICT personnel are here to help address mosquito problems that you may be experiencing.

It is important to remember that we are in the midst of the West Nile Virus season for the next several weeks.  For daily updates on ULV fogging, and West Nile Virus activity and status, please visit our Facebook Page and click “Like”.

July 21, 2017: The District just completed over 1200 acres in aerial larvicide operations.  On Wednesday, July 19 over 600 acres of the Boise River from Kingsbury Rd. to the Middleton Rd. Bridge was treated with the bacterial mosquito larvae control agent Bacillus thuringiensis israelensis (Bti).  On Friday, July 21 another 600+ acres was treated along the south shore of Deer Flat National Wildlife Refuge-Lake Lowell from the Lower Embankment Dam to the N.Y. Canal inflow. Earlier this week, a surveillance trap located at Wilson Ponds tested positive West Nile virus, follow up trapping after several ULV “fogging” around the Wilson Ponds area (Locust and S. Powerline) and additional larvicide treatments in drains, the Wilson Ponds and wetlands area has revealed no mosquito activity.

June 28, 2017: Our trap located at Caldwell Ponds that read Positive West Nile Virus is now reading no activity.  Nighttime ULV fogging operations on 160 acres on Thursday, June 22, Friday, June 23 and again Tuesday, June 27.  Along with this operation, 400 acres of Boise River flood zone was treated by air with Bacillus Bacteria mosquito larvae control product on Saturday, June 24.  Another aerial mosquito larvae control operations was also conducted on Saturday, June 24 on over 400 acres of flooded Boise River from Middleton Road to Blessinger Road, North side of the Boise River.  As of today, our Middleton Traps are looking pretty good with very small numbers of Culex species mosquitoes.  On the other hand, Culex species mosquitoes populations of mosquitoes trapped on Deer Flat National Wildlife Refuge are very high.  We will be testing those traps today.  We have to remember that situations can literally  change over night. We have completed  mosquito larvae control operations on approximate 500 acres of flooded habitat of the refuge earlier this week and have completed about 350 acres of night time ULV (fogging) treatments in residential areas around the refuge the past two nights.