STATUS OF WEST
11.4.13: As the season winds down, the District is working hard to
suppress next year's Asian tiger mosquito population by breaking the mosquito
life cycle this fall and prevent the spread of this mosquito. We will
conduct an additional treatment along the northern edge of the infestation on
*REVISED DATE* Thursday November 7 between the hours of 12 a.m. and 5 a.m.
And Friday, November 8 between the hours of 12 a.m. and 5 a.m. (as needed) Details can be
10.16.18: District staff will conduct an additional treatment for
Asian tiger mosquitoes at the northern edge of the infestation in portions of
southern Arcadia and unincorporated Los Angeles County on Friday 10/18/13
between the hours of 1:00 a.m. and 3:00 a.m. A map of the treatment
area can be seen at: http://goo.gl/maps/QpKa7
and details are available
8.27.13: Our next treatment will occur during the early morning hours
(midnight to approx. 5AM) on Wednesday August 28th in the infestation zone in El
Monte. The treatment areas can be seen at
District will apply Altosid (S-Methoprene) as a ultra-low volume fog targeting
immature mosquitoes in backyard water-filled containers.
Click for details.
8.16.13: Additional treatments are scheduled for early Tuesday, August
20, 2013 between the hours of 12AM (midnight) and 5AM in the following area:
http://goo.gl/maps/Uu88. Area 1 is
scheduled for treatment (area 2 if time permits). Details can be found
8.13.13: The District will treat several neighborhoods for adult Asian
tiger mosquitoes during the early morning hours of August 15th.
Neighborhoods scheduled for treatment can be seen at:
details can be found
6.24.13 UPDATE: We continue to see tiger mosquito activity. To address
the ongoing infestation, we have scheduled an additional treatment
targeting immature (larval) mosquitoes for the early morning hours of Thursday
June 27th in select neighborhoods in El Monte and South El Monte. To view
the treatment area visit
http://goo.gl/maps/E0KE6 and read our
4.9.13 UPDATE: In partnership with the Greater Los Angeles
County Vector Control District, we will conduct our first large-scale treatment
for Asian tiger mosquitoes on April 11, 2013 during the overnight hours between
12am and 5am. Targeting the immature mosquitoes in the early season will
suppress adult populations as the season progresses. Read our latest
Press Release for more information on treatment areas, products used,
and what you can do to help!
11.5.12 UPDATE: Asian tiger mosquito activity in October was the
highest level seen to date. A total of 92 samples were collected in
October from the cities of El Monte and the southern edge of Arcadia. As
mosquito activity winds down for winter, it is imperative that residents search
for and remove all containers that may fill with water during the rainy season.
Female tiger mosquitoes will lay eggs on these containers that will hatch next
spring. LET'S BREAK THIS CYCLE TODAY!
10.10.12 UPDATE: Tiger mosquitoes were
identified for the first time in the City of Arcadia - approximately 1/4
mile northeast of the intersection of Santa Anita and Live Oak Avenues, along
the city's southern border. We urge residents in this area, and throughout
the infestation zone, to immediately remove all containers that can
capture and hold rainwater before the rain expected tonight.
9.20.12 UPDATE: Asian tiger mosquitoes have been found on more than
240 properties in the El Monte and South El Monte area this year alone.
Read the latest
Our goal is to eradicate this mosquito, but we cannot do it without your
Read the latest press release and help us protect your community!
the Infestation Alert Flyer in
share with your neighbors and family!
WATCH OUR NEW VECTOR
INSPECTORS ANIMATED SHORT FOR KIDS! Would you like a kit of your own? OR
a class set?
VECTOR INSPECTORS animated video wins awards! Check it out:
The Asian tiger mosquito (Aedes albopictus) was identified September
in the City of El Monte.
This aggressive day-biting mosquito is very small (approx. 1/4 inch) with
distinctive black and white banding. If you think you have seen this
mosquito or have received mosquito bites during daylight hours, please
REPORT them and help us eliminate this threat.
The Asian tiger mosquito survives well in association with humans and lays
eggs in smaller water-filled containers around the property.
- Dump out standing water and store containers upside down
- Dispose of or remove any unused containers
- Dispose of tires stored outdoors or move them to a sheltered area
- Drill drain holes in the bottom of tire swings or other play equipment
that may collect rainwater
Expanded Search Continues
The District is working with the Greater Los Angeles County Vector Control
District to inspect other areas to determine the extent of the infestation.
The interactive map below shows streets highlighted in BLUE where the Asian
tiger mosquito has been identified to date.
As of November 8, 2011, the Asian tiger mosquito has been found in the
cities of El Monte and South El Monte and in a County area near the border of
Duarte and Irwindale.
Managing this species will require ongoing, aggressive actions to eliminate
standing water on both public and private property. This mosquito lays its
eggs above the waterline in small containers (such as saucers under potted
plants) which are holding or have recently held water. Empty all
containers and place them in the sun for 24-48 hours before storing inverted to
kill any eggs present and help break the mosquitoes lifecycle.
We need the public's help! Please check your yard carefully for anything
that may collect and hold rainwater - search under bushes for cans, bottles,
toys, or other objects and dispose of, or store these indoors or in a covered
Even though it is winter, we are still seeing mosquito activity. The work
we do NOW will reduce the number of mosquitoes surviving and reproducing next
For More Information:
Information Center: Pesticides used in mosquito control
California, Riverside Center of Invasive Species Research
Disease Control and Prevention - Aedes albopictus information
West Nile Virus
is present in the San Gabriel Valley EVERY year!
Please take a few minutes to walk around your property and dump out any accumulated
rainwater from buckets, barrels, old tires, etc. The work you do now will
break the mosquito life cycle and protect you and your family from West Nile
Contact the District to report 'green' inoperable swimming pools or
non-functional ponds & fountains. These can breed thousands of mosquitoes
WNV is primarily transmitted bird to bird by mosquitoes. Many species
of birds can get WNV and in some, it is nearly always fatal. The presence
of dead birds in the neighborhood is often the first indication of WNV activity.
Help us monitor and control WNV - Report ALL DEAD BIRDS to
www.westnile.ca.gov or (877) 968-2473.
Not all birds can be collected and tested. These reports help us direct
our control efforts and keep you safe.
Good information about the symptoms and illness due to WNV can be found at
VIRUS ACTIVITY IN SAN GABRIEL VALLEY:
Information on transmission, surveillance,
symptoms, and recommended precautions.
8.27.13 UPDATE: West Nile virus activity has increased in the San Gabriel
Valley - Infected mosquitoes and chickens tested positive last week from the
following cities: Arcadia, Irwindale, and Monterey Park. Residents should assume
WNV is being actively transmitted by mosquitoes throughout the San Gabriel
Valley and take necessary precautions to avoid mosquito bites. Read our latest
8.7.13 UPDATE: The District received confirmation of additional WNV
infection in birds in the San Gabriel Valley. View the
table below for the latest information. This is clear indication that the
virus is active and transmitting - take
precautions to protect yourself
and your family.
incidence if West Nile virus found this year in San Gabriel Valley.
A dead bird picked up from the city of Arcadia tested positive for WNV.
It's time to check your yards and dump out water in buckets, saucers, or any
other containers now to break the mosquito live cycle. Information about
other activity in California can be found at
PLEASE TAKE EXTRA PRECAUTIONS AGAINST MOSQUITOES!
The District tests dead birds, chickens, and mosquitoes for the presence of
mosquito-transmitted virus. More information can be found on our
Disease Surveillance tab
So far this year, West Nile virus has been detected in the following cities:
water or request our assistance
Report dead birds
How to Control Mosquitoes
Check out our NEW Mosquitoes &
Mosquito-Borne Disease Brochure
Are you seeing GIANT MOSQUITOES?
Every spring we receive numerous
calls reporting an emergence of 'giant mosquitoes' that residents often find
indoors or around porch lights. The good news is that these are NOT
mosquitoes and they are not dangerous.
Crane flies are an important
spring-time food source for baby birds, so if they make their way indoors, just
capture them in a cup and release them back outside. For more information
read Crane Fly Facts or visit:
Important links regarding West Nile Virus:
General information - WNV Brochure
CDC WNV Website - Web Site
State of California WNV Information - Web
Los Angeles County WNV Website - Web
West Nile virus information in Spanish -
West Nile virus
information in Chinese - Web
West Nile virus information in Vietnamese -
Statement on Mosquito Control in the United States from the U.S. Environmental
Protection Agency (EPA) and the U.S. Centers for Disease Control and Prevention
Maps & Current Case Information -
All press releases are in .pdf format. If you do not have Adobe Acrobat installed, or have trouble viewing the files please click here to get the latest version of Acrobat.
WNV Identified in Claremont
8.27.13 - WNV
Activity Intensifies in San Gabriel Valley
Treatment Scheduled for Asian Tiger Mosquitoes
Treatment Scheduled for Asian Tiger Mosquito
Fogging Scheduled in El Monte to Combat Asian Tiger Mosquitoes
More WNV found in the San Gabriel Valley
Joint Treatment for Tiger Mosquitoes Scheduled
virus Found in Arcadia
Helicopter Surveillance for Green Pools Begins
Early-Season Treatment to Target Asian Tiger Mosquitoes
Asian Tiger Mosquitoes Found in Arcadia
Asian Tiger Mosquito Update
Activity Intensifies in San Gabriel Valley
WNV Detected in Monrovia Mosquitoes
Heat and Humidity Increase Mosquito Dangers
WNV Found in San Gabriel Valley
Additional Fogging Scheduled to Combat Asian Tiger Mosquito Infestation
Treatment for Adult Tiger Mosquitoes Scheduled for Friday
Increase in Tiger Mosquitoes in El Monte
Tiger Mosquitoes Confirmed in El Monte and South El Monte
3-15-12 - Invasive Tiger Mosquitoes: Are They Back?
High Winds May Help Fight Invasive Mosquito
Additional Door-to-Door Inspection Scheduled
Multi-Agency Expanded Search
UPDATE - Invasive Mosquito in San Gabriel Valley
Invasive Mosquito Found in El Monte
8-22-11 - WNV
Activity Continues - Public Participation Helpful
8-01-11 - West Nile
Virus Risk Higher This Year
6-24-11 - More WNV
Found - Neglected Pools May be to Blame
Are you Neglecting Your Pool? We're Looking For You!
West Nile Virus Found in San Gabriel Valley
8-20-10 - More WNV Found in San
7-02-10 - West Nile Virus
Found in Covina Crow
Canine Heartworm Risk Increased in San Gabriel Valley
7-23-09 - West
Nile Virus Found in La Verne and La Puente Birds
5-21-09 - Day in the
District - Open House May 29, 2009
Mosquito Control Services Now Available to Baldwin Park Residents
Risk of WNV Remains High - Stay Safe Over Labor Day Weekend
Southern California Vector Control Districts Band Together to Fight WNV
7-09-08 - Elevated WNV Risk
in Several San Gabriel Valley Cities
5-29-08 - First
Identification of WNV in 2008 - Arcadia & Temple City Crows Test Positive
Mosquitoes From San Gabriel Test Positive
West Nile Found in West Covina Mosquitoes
First Infected Mosquitoes Found in Covina
Additional Birds Infected with WNV Detected
8-03-07 - West Nile
Virus Detected in West Covina
Battling West Nile Virus From the Air
3-08-07 - West Nile
Virus Detected in El Monte Crow
2-16-07 - West Nile Virus
Detected in Monterey Park
8-07-06 - KTLA
Aids in West Nile Virus Fight
5-03-06 - Foothill Air Support
Team and Vector Control Take to the Skies in Search for Green Swimming Pools
2-08-06 - District Hosts Open
9-13-05 - Vector Control Aids
in Hurricane Relief
7-21-05 - Vector
Control to Ground Adulticide for mosquitoes
- New West Nile Virus Awareness insert available here
Warming Trend Brings Increased Evidence of West Nile Virus in San Gabriel Valley
West Nile Virus Identified in Valley
07-11-05 - Vector
Control Needs the Public's help
5-31-05 - Pasadena Police
Helicopters Join Fight Against West Nile Virus
01-21-05 - Mosquito Concerns on
08-05-04 - District
Services Expand Due to West Nile Virus
Additional Fogging at Arboretum Unnecessary
Increased West Nile Activity Triggers Localized Fogging
More West Nile virus Found in Southern California
Nile virus Resurfaces in San Gabriel Valley
09-15-03 - West Nile virus Found in Arcadia
Hidden Dangers in Your Backyard
09-06-02 - State Health Director Announces Probable Case of West Nile Virus
06-28-02 - Mosquito & Vector Control Services Now Available to Altadena & Kinneloa Residents
06-12-02 - Emerging
Diseases... Are we Prepared?
News & Updates -
District Information -
What is Vector Control? -
Vectors of Concern
Disease Surveillance -
Public Education -
Resources for Teachers -
For Kids! -
© San Gabriel Valley Mosquito & Vector Control District.
1145 N. Azusa Canyon Road - West Covina, CA 91790 - 626.814.9466