County to Spray in Rolando Area for Mosquitoes to Reduce Risk of West Nile Virus

July 7, 2025

San Diego County's Vector Control Program is conducting truck-mounted pesticide-mist treatments in the Rolando community from July 9-11 to combat mosquitoes that tested positive for West Nile virus on June 24. The treatments will use AquaDuet, an EPA-approved pesticide that poses low risks to humans and pets, and will target approximately 4,000 parcels in both San Diego and La Mesa areas from 1 a. m.

Who is affected

Residents of approximately 4,000 parcels in the Rolando community (including parts in San Diego and La Mesa)
Beekeepers and those with insects kept outdoors
People living in areas where West Nile virus-positive mosquitoes were detected
The general public in San Diego County who are at potential risk of West Nile virus

What action is being taken

County Vector Control is conducting ultra-low volume, truck-mounted pesticide-mist treatments from July 9-11 between 1 a.m. and 6 a.m.
The County is using AquaDuet, an EPA-approved pesticide, to reduce adult mosquito populations
Officials are providing information to the public about precautionary measures during treatment
The County is offering mosquitofish for free to control mosquito breeding in backyard water sources
The County is maintaining a "Fight the Bite" website to educate the public about prevention

Why it matters

West Nile virus was detected in mosquitoes in the Rolando area on June 24, with additional positive tests in follow-up surveillance
West Nile virus is a potentially deadly threat that can cause fever, headaches, body aches, and in rare cases, severe illness or death
While no human cases have been reported in San Diego County this year, the county reported 2 cases in 2024
Reducing adult mosquito populations helps prevent the spread of the virus to humans
Early intervention can prevent a larger outbreak in the community

What's next

No explicit next steps stated in the article

Read full article from source: The San Diego Voice & Viewpoint