Delta Mosquito and Vector Control District
09/16/2025
** Visalia **
Due to high numbers of mosquitoes and the detection of West Nile virus in mosquito samples, Delta Mosquito & Vector Control District will conduct adult mosquito treatments using truck-mounted ultra-low volume (ULV) equipment.
No precautions are needed for this treatment.
Treatments will occur tonight in Visalia between the hours of
9:00 p.m. and 1:00 a.m. on Tuesday night, September 16th
We treat areas with high mosquito counts and West Nile virus, focusing on spots where it could spread. Not all areas are treated nightly.
Daytime bites? Likely Aedes aegypti—an invasive, aggressive biting mosquito that prefers humans at all times of the day, but doesn’t spread West Nile and isn’t targeted by night sprays.
Please direct message us with your email to recieve future updates and notifications.
09/08/2025
**Northwest Visalia **
Due to high numbers of mosquitoes and the detection of West Nile virus in mosquito samples, Delta Mosquito & Vector Control District will conduct adult mosquito treatments using truck-mounted ultra-low volume (ULV) equipment.
No precautions are needed for this treatment.
Treatments will occur tonight in Visalia between the hours of
9:00 p.m. and 1:00 a.m. on Monday night, September 8th
We treat areas with high mosquito counts and West Nile virus, focusing on spots where it could spread. Not all areas are treated nightly.
Daytime bites? Likely Aedes aegypti—an invasive, aggressive biting mosquito that prefers humans at all times of the day, but doesn’t spread West Nile and isn’t targeted by night sprays.
Please direct message us with your email to recieve future updates and notifications.
09/05/2025
**Visalia and Farmersville**
Due to high numbers of mosquitoes and the detection of West Nile virus in mosquito samples, Delta Mosquito & Vector Control District will conduct adult mosquito treatments using truck-mounted ultra-low volume (ULV) equipment.
No precautions are needed for this treatment.
Treatments will occur tonight in Farmersville and Visalia between the hours of
9:00 p.m. and 1:00 a.m. on Thursday night, September 4th
We treat areas with high mosquito counts and West Nile virus, focusing on spots where it could spread. Not all areas are treated nightly.
Daytime bites? Likely Aedes aegypti—an invasive, aggressive biting mosquito that prefers humans at all times of the day, but doesn’t spread West Nile and isn’t targeted by night sprays.
Please direct message us with your email to recieve future updates and notifications.
08/20/2025
World Mosquito Day is celebrated annually on 20 August to commemorate British doctor Sir Ronald Ross’s landmark discovery in 1897 that female Anopheles mosquitoes are responsible for transmitting malaria.
Prevent producing mosquitoes by:
✔ Draining stagnant water
✔ Cleaning gutters and containers weekly
✔ Wear protective clothing and use EPA registered repellents.
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Contact the organization
Telephone
Address
1737 West Houston Avenue
Visalia, CA
93291
Opening Hours
| Monday | 7:30am - 4pm |
| Tuesday | 7:30am - 4pm |
| Wednesday | 7:30am - 4pm |
| Thursday | 7:30am - 4pm |
| Friday | 7am - 4pm |