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
8.31.12 UPDATE: Significant Asian tiger mosquito activity
continues to be found in the city of El Monte. Hot days and high humidity
provide ideal conditions for its survival and spread. PLEASE CHECK YOUR
PROPERTY AGAIN FOR ANY STANDING WATER - ESPECIALLY AFTER THE RECENT RAINS!
Remove all unnecessary containers from your yard, and immediately report any
tiny, day-biting mosquitoes to the District. We will inspect and treat your
property as needed at NO COST!
7.18.12 UPDATE: Under a cooperative partnership, District staff were
joined on July 10th by employees from neighboring Districts to assist with Asian
tiger mosquito treatments. We were able to successfully treat more than 70
properties in and around known problem sites. Management and District
Trustees are deeply appreciative of the assistance of Greater Los Angeles County
Vector Control District, Northwest Mosquito & Vector Control District, Orange
County Vector Control District, and West Valley Mosquito & Vector control
7.3.12 UPDATE: The District
will conduct additional treatments on Friday, July 6th, for adult and larval
mosquitoes by truck-mounted foggers between the hours of 1am - 4:30am.
Adult mosquitoes will be targeted using an ultra-low volume (ULV) application of
DUET. A second vehicle will apply ALTOSID as a low-volume (LV) mist to
treat larval mosquitoes in hidden backyard water sources. Read our
RELEASE for specifics on the area scheduled for treatment and additional
information about the products being used.
6.21.12 UPDATE: On Friday,
June 22 between the hours of 3:30am and 5;30am, Vector Control personnel will
treat an approximate 1/4 mile area for adult Asian tiger mosquitoes.
Surveillance efforts over the past week have identified an increase in mosquito
populations in this area requiring more intensive efforts. Please read our
press release for details:
Fogging Scheduled to Combat Asian Tiger Mosquito Infestation
Increase in Asian tiger mosquito activity seen in southeastern portion of El
Monte this past week.
Late last week, both this District
and the Greater Los Angeles County Vector Control District identified Asian
tiger mosquitoes in the cities of El Monte and South El Monte respectively.
This is the first confirmed activity this year. PLEASE HELP US BY REMOVING
SOURCES OF STANDING WATER AND REPORTING DAY-BITING MOSQUITOES IMMEDIATELY.
Read our latest
The District inspected nearly 700 properties last month and we are happy to
report that we have not identified any tiger mosquitoes this year. The
season is just beginning so keep your eyes open and make sure you check your
yard and get rid of containers that filled up with rainwater! If you think
you have seen them or would like us to inspect your yard,
contact us today.
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.
View Asian Tiger Mosquitoes in the San Gabriel Valley in a larger map
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
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.
10.8.12 UPDATE: Cooler weather in the forecast. Thankfully, we are
nearing the end of our WNV transmission season. While we continue to get
reports of human cases, most of those are from September exposure. This
year, WNV activity has been identified in nearly every city in the San Gabriel
Valley. There are currently 231 human cases (10 deaths) in
California, 47 from Los Angeles
8.31.12 UPDATE: WNV activity increase dramatically in SGV. In the
past week, the District has detected significant levels of activity in birds,
mosquitoes and sentinel chickens. Read the PRESS
RELEASE here. There are 8 human cases confirmed in
Los Angeles County by
the Department of Public Health this year. In
California, there are 56 human cases
and two deaths.
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:
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